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Delta M100A 280 Flex Installation And Operation Manual
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Delta M100A 280 Flex Installation And Operation Manual

Delta M100A 280 Flex Installation And Operation Manual

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M100A_280 Flex (RPI104M280xxx)
Installation and Operation Manual
Europe
Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18

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  • Page 1 M100A_280 Flex (RPI104M280xxx) Installation and Operation Manual Europe Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 2 Delta Electronics (Netherlands) B.V hereby declares that this device complies with the radio equipment Directive 2014/53/EU. The Delta part number can be found on the type plate of the The full text of the EU Declaration of Conformity is available at: inverter.
  • Page 3 Table of Contents Sections underlined in blue have changed compared to the previous version of this document. An overview of the changes can be found in Section „1.1 Information about the versions of this manual“ on page 7. Table of Contents 1.
  • Page 4 Connection of a DC1 data collector from Delta ....... . .
  • Page 5 Commissioning with the Delta Service Software (DSS) ........
  • Page 6 Delta Customer Service ........
  • Page 7 Store this manual in a safe place in the vicinity of the inverter so that it is always quickly available when working on the inverter. Delta Electronics is not responsible for damage resulting from failure to follow the safety and operating instructions set out in this manual.
  • Page 8 1 About this manual Warning notices and warning symbols Writing and labeling conventions This manual uses the following warning notices and symbols Some sections in this manual are specially labeled. to describe potential dangers and the measures necessary for Labeling of work instructions reducing these dangers.
  • Page 9 2 Basic safety instructions Basic safety instructions WARNING Electric shock The IP66 protection degree is no longer guaran- DANGER teed when the door is open. ► Only open the door when the inverter is Electric shock Potentially fatal voltages are present in the disconnected from the power supply.
  • Page 10 ● All repair work on the inverter must be carried out by Delta Electronics. Otherwise the warranty will be void. ● Warning notices, warning symbols and other markings attached to the inverter by Delta Electronics must not be removed.
  • Page 11 3 Intended purpose Intended purpose The inverter may be used only for the specified intended pur- pose. The intended purpose of the inverter is defined as follows: ● Use in stationary solar systems that are connected to the public grid. For conversion of the DC power that is generat- ed by the solar modules of the solar system into AC power which is fed into the local power grid.
  • Page 12 4 Product overview Unpacking the inverter Product overview Unpacking the inverter WARNING Heavy weight The inverter is very heavy (see “16. Technical Data”, page 192). ► Lift and move the inverter with at least 2 people or a suitable lifting device. Fig.
  • Page 13 4 Product overview Unpacking the inverter Scope of delivery ► Check that the package is complete and check all components for damage before starting installation work. ► Do not use any damaged components. ► Keep the packaging. Q'ty Naming Description Inverter For mounting the inverter to the wall Mounting plate...
  • Page 14 Installatiehandleiding Instrukcja instalacji Instruções de instalação Installationsanvisning Delta Solar Inverter M100A_280 QIG BOX EU V2.0 XX 2023-09-15 Test report Installation instructions for China (not valid for Europe) Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 15 4 Product overview Accessories to be ordered separately Accessories to be ordered separately 4.3.1 Floor mounting kit Delta part number: 313792800-S. The floor mounting kit consists of the following components. Q'ty Naming Description 120 mm feet for ground mounting of the inverter...
  • Page 16 4 Product overview Overview of components and connections Overview of components and connections Fig. 4.2: Overview of external components and connections Air outlet PE cable feed-through Label for assigning module strands to terminals AC cable feed-through DC isolating switch 1+2 COMM cable feed-through for RS485, digital inputs, dry contacts, external power-off DC connection panel...
  • Page 17 4 Product overview Overview of components and connections Fig. 4.3: Overview of internal components with protective covers removed 1 Type 2 DC surge protection devices (optional type 1+2 com- AC connection terminals bined DC surge protection devices) 2 Internal fan 1 Internal fan 2 3 Type 2 AC surge protection devices Connection terminals for RS485, digital inputs, dry contacts...
  • Page 18 4 Product overview LEDs LEDs Grid Grid LED: green Alarm Alarm LED: red / yellow Comm. Communication LED: red / yellow / green Table 4.1.: Use and color of the LEDs LED is off. LED flashes yellow in the speci- LED is illuminated yellow.
  • Page 19 4 Product overview LEDs Grid Alarm Explanation 1s/1s Boot sequence. The inverter is connected to the grid. Inverter failure. Power-off via external signal. 1s/1s Inverter warning. 1s/1s Solar panel system failure. 1s/1s Solar system warning. 5s/10s No DC. Also appears when both DC disconnectors are open. 0.25s 0.25s DC problem.
  • Page 20 4 Product overview AC-side components 4.6.3 AC surge protection devices AC-side components Related topics “6.5 Planning the grid connection (AC)”, page 59 “8.8 Connecting the grid (AC)”, page 100 4.6.1 AC cable feed-through Fig. 4.6: View of type 2 AC surge protection devices with the cover removed The inverter has replaceable type-2 AC surge protection devices (EN 61463-11) which protect the inverter against excessive volt-...
  • Page 21 4 Product overview DC-side components DC-side components Related topics “6.6 Planning the connection of the solar modules (DC)”, page “8.9 Connecting the solar modules (DC)”, page 107 4.7.1 DC connection panel Fig. 4.9: DC connector panel with mounted support brackets The support brackets absorb the weight of the DC cables, pro- tecting the connectors from excessive mechanical stress.
  • Page 22 4 Product overview DC-side components 4.7.2 DC disconnectors Fig. 4.13: Both DC isolating switches in theON position = the connection to the solar modules is closed Fig. 4.11: DC disconnector The connection between the inverter and the solar modules The DC disconnectors are marked on the inverter with the words isclosed when both DC isolating switches are in the ON position.
  • Page 23 4 Product overview Communication connection Communication connection Connection Connector type 2 x RS485 (DATA+ and DATA–) Terminal block 1 x VCC (12 V, 0.5 A) Terminal block Related topics 6 x digital inputs Terminal block “5. Planning the device communication and plant monitoring”, 2 x dry contacts Terminal block page 30...
  • Page 24 4 Product overview Grounding connection Grounding connection Related topics “6.5.6 Grounding the inverter housing”, page 60 “8.5 Grounding the inverter housing via the external ground con- nection”, page 80 4.9.1 Grounding the inverter housing The inverter housing can be grounded both mounting holes. Fig.
  • Page 25 4 Product overview Cooling system 4.10.2 Internal fans 4.10 Cooling system The internal fans circulate the air inside the inverter to prevent heat buildup. Related topics “6.1 Lifting and transporting the inverter”, page 45 “12.5 Cleaning/replacing the fan module”, page 157 “12.6 Cleaning the air outlet”, page 161 4.10.1 Air inlet, air outlet and fan module Fig.
  • Page 26 4 Product overview Cooling system 4.10.3 Internal heat sinks Fig. 4.23: Internal heat sinks with rear cover plate removed The rear cover plate can be removed to gain access to the inter- nal heat sinks. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 27 Ingress Protection Operating Temperature Range -25 ~ +60°C Non-isolated inverter * MAX: output power can be selected during initial setting Made in Taiwan Authorized representative Delta Electronics (Netherlands) B.V. Zandsteen 15, 2132 MZ Hoofddorp The Netherlands E-S,EMC V63595-BSMI J3ACa3A3N0016 Date: 2023-10 60 sec.
  • Page 28 Made in Taiwan Device made in Taiwan. CE mark. By applying this mark, Delta declares that the inverter satisfies the provisions of the applicable EU directives. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 29 4 Product overview Type plate and markings Symbols on the rating plate Meaning This symbol is valid for Taiwan. E-S,EMC V63595-BSMI WEEE mark The inverter must not be disposed of as standard household waste, but in accor- dance with the applicable electronic waste disposal regulations of your country or region.
  • Page 30 The commissioning instructions apply to all of these inverters, espe- cially if they are combined in one solar system. Solar inverters from Delta provide you with several options for implementing commissioning, device communication and plant monitoring.
  • Page 31 Checkpoint Description Solution approach Windows PC with Delta Service Software (DSS). The inverters must be connected to each other via RS485. The PC is inte- grated into the RS485 bus as master using standard USB-RS485 How many inverters of this type A smartphone with the DeltaSo- adapter.
  • Page 32 ● DeltaSolar app for mobile devices (smartphone or tablet) with iOS and Android ● Delta Service Software (DSS) for Windows PC. Download partnerportal.delta-emea.com (registration required). Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 33 5 Planning the device communication and plant monitoring Communication hardware 5.4.2.2 Specification of the communication cable Communication hardware Shielded and twisted pair cable Cable type (CAT5 or CAT6) 5.4.1 Bluetooth interface Cable diameter 7.2 / 8 / 10 mm The inverter has an integrated Bluetooth antenna for wireless Wire cross-section 0.25 to 1.5 mm connection to a mobile device (smartphone or tablet).
  • Page 34 5 Planning the device communication and plant monitoring Connecting a data logger 5.5.2 Connecting a single inverter to a data log- Connecting a data logger Abschlusswiderstand = ON 5.5.1 Introduction Abschlusswiderstand = ON RS485 Datenlogger Fig. 5.4: Connection between a single inverter and a data logger ►...
  • Page 35 5 Planning the device communication and plant monitoring Connecting a data logger 5.5.3 Connecting multiple inverters to a data logger 5.5.3.1 General notes ► Set a different inverter ID for each inverter. Otherwise the data logger cannot identify the individual inverters. ►...
  • Page 36 5 Planning the device communication and plant monitoring Connecting a data logger The data logger is located in the middle of the RS485 bus Abschlusswiderstand Abschlusswiderstand = OFF Datenlogger RS485 Fig. 5.6: Connection of multiple inverters with a data logger in the middle of the RS485 bus ►...
  • Page 37 Fig. 5.7: RS485 for connection of a data logger The data logger and the inverter are connected via RS485. Data is transferred via Delta protocol with Modbus RTU. Take the following sections into account for ensuring a stable data connection.
  • Page 38 5 Planning the device communication and plant monitoring Connection of a DC1 data collector from Delta 5.6.3 Connecting multiple inverters to the DC1 5.6.3.1 General notes ► Make sure that both cables are connected to the RS485-1 connection on the DC1! ►...
  • Page 39 5 Planning the device communication and plant monitoring Connection of a DC1 data collector from Delta The data logger is located in the middle of the RS485 bus Abschlusswiderstand RS485 Fig. 5.10: Connection of multiple inverters with the DC1 within the RS485 bus ►...
  • Page 40 5 Planning the device communication and plant monitoring External alarm devices External alarm devices Fig. 5.11: Dry contacts and 12-VDC power supply The inverter has two relays with dry contacts (1), each for an external acoustic or visual alarm device. The RS485 terminal block has a 12-VDC power supply (2).
  • Page 41 5 Planning the device communication and plant monitoring Ripple control receiver Ripple control receiver Fig. 5.12: Terminal block with digital inputs The inverter has 4 digital inputs (1) for connecting a ripple control receiver. Naming Short cir- Assigned action cuit External power-off (EPO) V1 + K0 Maximum active power lim-...
  • Page 42 5 Planning the device communication and plant monitoring External power-off External power-off Fig. 5.13: Terminal block with digital inputs To disconnect the inverter AC-side from the grid connection point, a switching signal can be sent via digital input K0 (1). The relay is designed at the factory as a normally open con- tact.
  • Page 43 5 Planning the device communication and plant monitoring Grounding the RS485 cable 5.10 Grounding the RS485 cable IMPORTANT Unwanted currents In some installation variants, unwanted currents can flow when multiple inverters are connected via RS485. ► Do not use GND and VCC on the communi- cation card.
  • Page 44 5 Planning the device communication and plant monitoring Connecting a Windows PC 5.11 Connecting a Windows PC To use the Delta Service Software (DSS), connect a Windows PC to the RS485 bus. This requires the following accessories. Accessories Description Standard RS485 to USB...
  • Page 45 6 Planning the installation Lifting and transporting the inverter Planning the installation This chapter describes only the planning of the installation work. The execution of the instal- lation work and the associated dangers are described in “8. Installation”, page 72. Lifting and transporting the inverter ►...
  • Page 46 6 Planning the installation Installation location 6.2.2 Installation height Installation location ► Mount the inverter so that the LEDs are always visible and all components are easily accessible. Related topics “8.4 Mounting the inverter”, page 75 6.2.1 Requirements for the wall, floor and mounting system ►...
  • Page 47 6 Planning the installation Installation location 6.2.3 Installation position Fig. 6.2: Installation position Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 48 6 Planning the installation Installation location 6.2.4 Outdoor installations Fig. 6.3: For outdoor installations, protect the inverter from direct sun, UV radiation, rain and snow The inverter has a protection degree of IP66 and can be installed indoors and outdoors. Despite this, the inverter should be pro- tected by a roof against direct sun, UV radiation, rain and snow.
  • Page 49 6 Planning the installation Installation location 6.2.5 Installation clearances and air circulation > 600 > 300 > 300 and air circulation Fig. 6.4: Mounting distances and air circulation, variant 1 (in mm) > 300 > 300 > 300 ... 600 and air circulation Fig.
  • Page 50 6 Planning the installation Installation location > 50 > 300 > 300 and air circulation Fig. 6.6: Mounting distances and air circulation, variant 3 (in ► Ensure sufficient air circulation. There must not be heat buildup around the inverter. For installation clearances of 30 to 60 cm between two inverters, install a separation plate (A) between the inverters.
  • Page 51 6 Planning the installation Dimensions Dimensions 144,5 263,4 Fig. 6.7: Inverter with mounting plate, dimensions without antennae (in mm) Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 52 6 Planning the installation Dimensions Feet for floor mounting. Dimensions (in mm) Fig. 6.8: Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 53 6 Planning the installation Characteristic curves Characteristic curves Note: Full reactive power up to 900 V VOC available. Restart at a hysteresis value of 850 V. = 400 V = 100 kW) cos ϕ = 1,0 110% 100% 90 % 80 % 550 V 70 %...
  • Page 54 6 Planning the installation Characteristic curves [kW] = 400 cos ϕ = 1,0 Ambient temperature 25 °C 30 °C 40 °C 50 °C 1000 PV Voltage [V Characteristic curve "Active power control depending on the PV voltage; cos φ = 1.0; AC voltage = 400 V Fig.
  • Page 55 6 Planning the installation Characteristic curves [kW] = 480 cos ϕ = 1,0 Ambient temperature 30 °C 40 °C 50 °C 1000 PV Voltage [V Characteristic curve "Active power control depending on the PV voltage; cos φ = 1.0; AC voltage = 480 V Fig.
  • Page 56 6 Planning the installation Characteristic curves Efficiency [%] = 400 V 100% 610 V 550 V 840 V 100% AC Output power P/P = 100 kW Efficiency characteristic curve; AC voltage = 380/400 V Fig. 6.13: Efficiency [%] = 480 V 100% 550 V 720 V...
  • Page 57 6 Planning the installation Characteristic curves per MPP tracker [kW] 25,2 30,0 16,5 15,1 35,7 1002 with fan DC input voltage without fan Fig. 6.15: Characteristic curve "Max. DC power per MPP tracker depending on DC input voltage" Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 58 6 Planning the installation Characteristic curves per MPP tracker 0,028 1002 with fan DC input voltage without fan Fig. 6.16: Characteristic curve "Max. DC current per MPP tracker depending on DC input voltage" Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 59 This means that the inverter meets the require- ments of DIN VDE 0100-712. Possible error events were assessed by Delta in accordance with the current installation standards. The assessments showed that no hazards arise from operating the inverter in combination with an upstream, type A residual current circuit breaker (FI circuit breaker, RCD).
  • Page 60 6 Planning the installation Planning the grid connection (AC) 6.5.6 Grounding the inverter housing 6.5.7 Permissible grid voltages 3P3W Voltage range 3P4W Voltage range WARNING L1-L2 400/480 V ±20% L1-N 230 V ±20% Electric shock In the event of a fault, the inverter housing may L1-L3 400/480 V ±20%...
  • Page 61 6 Planning the installation Planning the grid connection (AC) 6.5.9.2 AC cable specifications The PE conductor can be connected as part of a cable with four or five conductors or as a sepa- rate cable with a single conductor. 280 mm 280 mm Fig.
  • Page 62 6 Planning the installation Planning the grid connection (AC) 6.5.9.3 Specification of the PE cable with single conductor PE bolt material: nickel-plated Cables Cable lug ● Copper, tin coated Copper ● Pure copper ● Aluminum, tin-coated Aluminum ● Al-Cu crimp connectors Table 6.5.: Material of the cable lugs for the PE conductor 6.5.9.5 Handling aluminum conductors during installation work...
  • Page 63 6 Planning the installation Planning the grid connection (AC) 6.5.9.6 Instructions for the use of sector-shaped aluminum cables When using sector-shaped aluminum cables without Al-Cu compression joints, insert each cable into the clamping point as shown in the picture. Fig. 6.26: Al-Cu compression joint and heat-shrink sleeving for sector-shaped aluminum cables Al se...
  • Page 64 6 Planning the installation Planning the connection of the solar modules (DC) Planning the connection of the solar modules (DC) Related topics “8.9 Connecting the solar modules (DC)”, page 107 The inverter has an integrated function for detecting reverse polarity on the DC side. If such reverse polarity is detected, the inverter triggers an error message.
  • Page 65 6 Planning the installation Planning the connection of the solar modules (DC) 6.6.3 Arrangement of the DC inputs on the DC 6.6.4 Functioning of integrated string monitoring connection panel The string is monitored via current sensors. Fig. 6.29 shows the distribution of the current sensors to the module strings of a DC The inverter has 6 DC inputs (DC1 to DC6), each with three DC input.
  • Page 66 6 Planning the installation Planning the connection of the solar modules (DC) 6.6.6 Specification for the DC cables 6.6.5 Use of string fuses A maximum of two module strings can be connected to a sin- The DC plugs for all DC connectors are supplied with the inverter. gle MPP tracker of this inverter.
  • Page 67 6 Planning the installation Planning the installation of type 1+2 DC combined surge protection devices Planning the installation of type 1+2 DC combined surge protection devices The inverter is supplied with pre-installed type 2 AC and DC surge protection devices. Type 1+2 combined DC surge protec- tion devices can be ordered as accessories.
  • Page 68 6 Planning the installation Grid and system protection Grid and system protection 1. The German standard VDE-AR-N 4105 requires external grid and system protection with a coupling switch for PV systems larger than 30 kVA. 2. Alternatively, VDE-AR-N 4105 allows the use of an inverter with an internal coupling switch when this switch discon- nects the inverter from the grid in less than 100 ms.
  • Page 69 7 Planning the Commissioning Prerequisites for commissioning Planning the Commissioning Commissioning is the same for M50A, M70A and M100A inverters. The commissioning instructions apply to all of these inverters, especially if they are combined in one solar system. Prerequisites for commissioning The inverter must be supplied with power (AC or DC) in order to carry out commissioning.
  • Page 70 ● Set all parameters of the inverter. ● Update the inverter firmware. 7.2.2 Delta Service Software (DSS) The Delta Service Software is available for Windows PCs. It can be downloaded from partnerportal.delta-emea.com (registration required). The PC is connected to the RS485 terminal block of an inverter in the RS485 bus, see “5.10 Grounding the RS485 cable”,...
  • Page 71 7 Planning the Commissioning Special Topics Special Topics 7.3.1 Commissioning several inverters If several inverters are installed in the solar system and these are all connected via RS485, commissioning is best carried out via the DSS. This allows parallel and simultaneous access to all inverters on the RS485 bus.
  • Page 72 8 Installation Safety instructions Installation WARNING Electric shock If the doors of the inverter are open, the IP66 ► Read chapter “6. Planning the installation”, degree of protection is no longer guaranteed. page 45 and this chapter in full before ►...
  • Page 73 8 Installation Sequence of installation and commissioning steps Sequence of installation and commis- sioning steps Install optional internal accessories such as type 1+2 AC and DC combined surge protection devices in a dry environment and before mount- ing the inverter. Step Notice Description in chapter...
  • Page 74 8 Installation Unpacking the inverter Unpacking the inverter WARNING Heavy weight The inverter is heavy. ► Lift and carry the inverter with at least 2 people. Fig. 8.1: Unpacking the inverter Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 75 8 Installation Mounting the inverter Mounting the inverter 8.4.1 Ground mounting (upright) WARNING Heavy weight The inverter is heavy. ► Lift and carry the inverter with at least 2 people. The feet for floor mounting must be ordered separately. 1. Screw the 2 feet for ground mounting onto the underside of the inverter (torque: 24.5 Nm).
  • Page 76 Delta Electronics. Always check with Delta Customer Service first if you intend to devi- ate from the instructions given in this section. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 77 8 Installation Mounting the inverter 144,5 263,4 Fig. 8.2: Dimensions for wall mounting Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 78 8 Installation Mounting the inverter 1. Install the inverter brackets at the specified distance. 2. Attach the mounting plate to the wall/mounting system with at least 8 M6 screws. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 79 8 Installation Mounting the inverter 3. Tighten the 8 points highlighted in the image at a mini- mum. 6,5 mm 4. Mount the inverter on the mounting plate. 5. Check that the inverter is correctly mounted on the mount- ing plate. If you want to use one of the mounting holes to 7 mm ground the inverter housing, observe the instruc-...
  • Page 80 8 Installation Grounding the inverter housing via the external ground connection Grounding the inverter housing via the external ground connection WARNING High current ► Always comply with local regulations relating to grounding cable requirements. ► To increase the safety of the system, always ground the inverter housing even when this is not required by the local regulations.
  • Page 81 8 Installation Preparing electrical installation Preparing electrical installation There is normally an isolating switch (for example in an equipment wiring box) between the inverter and the grid connection box and between the inverter and the solar modules. This isolates the inverter from all the AC and DC voltage sources and renders it de-energized.
  • Page 82 8 Installation Preparing electrical installation 5. Unscrew and open the lower door lock cover. 6. Open the upper and lower door lock. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 83 8 Installation Preparing electrical installation 7. Open the door and secure it on top with the Allen key. 8. Alternatively, the door can also be unhinged. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 84 8 Installation Connecting the communication card Connecting the communication card Connection Connection type 2x RS485 (DATA+ and DATA–) Terminal block The connections for RS485, the dry contacts, the 1x VCC (12 V, 0.5 A) Terminal block digital inputs and the external power-off (EPO) 6x digital inputs Terminal block are all on the communication card.
  • Page 85 8 Installation Connecting the communication card 8.7.2 Threading the communication cable 1. Unscrew the cable gland of the communication connection and remove the cable gland and seal. 2. Thread all communication cables through the cable gland and seal. 3. Insert the seal and cable gland of the communication con- nection and fasten the cable gland.
  • Page 86 8 Installation Connecting the communication card 8.7.3 Grounding the RS485 cable IMPORTANT Unwanted currents In some installation variants, unwanted currents can flow when multiple inverters are connected via RS485. ► Do not use GND and VCC on the communication card. ►...
  • Page 87 8 Installation Connecting the communication card 8.7.4 Connecting a single inverter to a data log- Termination resistor = ON ger or DC1 data collector RS485 120Ω Fig. 8.5: Connection between a single inverter and a data logger Fig. 8.3: RS485 terminals for connecting a data logger Abschlusswiderstand = ON Abschlusswiderstand = ON RS485...
  • Page 88 8 Installation Connecting the communication card 1. Connect the DATA+ wire to terminal 5 and the DATA– wire to terminal 6. 2. Switch on the RS485 termination resistor on the inverter. 3. Carry out one of the following steps: ► Switch the RS485 termination resistor of the data logger Termination resistor = ON RS485 Data logger...
  • Page 89 8 Installation Connecting the communication card 8.7.5 Connecting multiple inverters to a data log- ger or DC1 data collector 8.7.5.1 The data logger/DC1 is located at one of the two ends of the RS485 bus Data logger / DC1 1. Carry out one of the following steps: ►...
  • Page 90 8 Installation Connecting the communication card Data logger / DC1 2. On the cable coming from the data logger/DC1: Con- nect the DATA+ wire to terminal 5 and the DATA– wire to terminal 6. On the cable going to the second inverter: Connect the DATA+ wire to terminal 3 and the DATA–...
  • Page 91 8 Installation Connecting the communication card Data logger / DC1 4. On the cable coming from the previous inverter: Con- nect the DATA+ wire to terminal 5 and the DATA– wire to terminal 6. On the cable going to the next inverter: Connect the DATA+ wire to terminal 3 and the DATA–...
  • Page 92 8 Installation Connecting the communication card Data logger / DC1 6. Connect the DATA+ wire to terminal 5 and the DATA– wire to terminal 6. 7. Set the DIP switch for the RS485 termination resistor to the ON position. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 93 8 Installation Connecting the communication card 8.7.5.2 The data logger/DC1 is centrally located in the RS485 bus Data logger / DC1 1. On the cable going to the data logger/DC1: Connect the DATA+ wire to terminal 5 and the DATA– wire to terminal 2.
  • Page 94 8 Installation Connecting the communication card Data logger / DC1 1. Carry out one of the following steps: ► Switch the RS485 termination resistor of the data logger Termination resistor = ON off. RS485 Data logger ► On the DC1 data collector, connect both cables to termi-...
  • Page 95 8 Installation Connecting the communication card Data logger / DC1 2. On the cable coming from the data logger/DC1: Con- nect the DATA+ wire to terminal 5 and the DATA– wire to terminal 6. On the cable going to the next inverter: Connect the DATA+ wire to terminal 3 and the DATA–...
  • Page 96 8 Installation Connecting the communication card Data logger / DC1 4. Connect the DATA+ wire to terminal 5 and the DATA– wire to terminal 6. 5. Switch on the DIP switch for the RS485 termination resis- tor. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 97 12 V power supply to the dry contacts ► An event can be assigned to the dry contacts with Delta Service Software or the MyDeltaSolar app after commis- sioning. 8.7.6.2 Wiring for a single alarm unit with an internal 12 V...
  • Page 98 8 Installation Connecting the communication card ► An event can be assigned to the dry contacts with Delta Digital inputs Service Software or the MyDeltaSolar app after commis- sioning. V1 K0 K1 K2 K3 K4 K5 K6 8.7.7 Connecting a ripple control receiver...
  • Page 99 1. Connect the wires to the terminals V1 and K0. 2. After commissioning, the relay for the external power-off can be defined with Delta Service Software as a normally closed or normally open contact. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 100 8 Installation Connecting the grid (AC) Connecting the grid (AC) 30 mm ► Always observe the information in section “6.5 Planning the grid connection (AC)”, page 59! Fig. 8.14: Stripping length for phase and neutral conductors 8.8.1 General information 280 mm 280 mm Fig.
  • Page 101 8 Installation Connecting the grid (AC) 8.8.2 Information on routing the AC cable Feed the cable from the bottom or back. Insert the cable hori- zontally so that the sealing rings of the AC cable gland are tight. If the cable is inserted from above and tilted, water could enter. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 102 8 Installation Connecting the grid (AC) 8.8.3 Handling aluminum conductors during installation work ► The special properties of aluminum must be taken into con- sideration when using aluminum conductors: Aluminum "flows," i.e. it gives way under pressure. – – During stripping, a thin non-conductive oxide layer forms within a few minutes, which increases the contact resistance between the conductor and clamping point.
  • Page 103 8 Installation Connecting the grid (AC) 8.8.6 AC cable gland Fig. 8.19: Use of the parts of the AC cable glands depending on the cable diameter Cable diameter Torque 72 to 77 mm 10 Nm 6.5 to 4.5 mm 65 to 72 mm 12 Nm 6 to 3 mm 57 to 65 mm...
  • Page 104 8 Installation Connecting the grid (AC) 2. Pull the AC cable through the parts of the cable gland and route it into the inverter. 3. Insert and tighten the AC cable gland. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 105 8 Installation Connecting the grid (AC) 8.8.8 PE cable gland Fig. 8.20: Use of the parts of the PE cable gland depending on the cable diameter Cable diameter Torque 16 to 23 mm 3.5 to 5.2 Nm 1.5 to 5.0 mm 10 to 16 mm 3.5 Nm 1.5 to 5.0 mm...
  • Page 106 8 Installation Connecting the grid (AC) 2. Pull the PE cable through the parts of the cable gland. 3. Insert the PE cable gland and tighten it. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 107 8 Installation Connecting the solar modules (DC) Connecting the solar modules (DC) DANGER Electric shock Potentially fatal voltages are present at the DC cables of the inverter. When light falls on the so- lar modules, they immediately start to generate electricity.
  • Page 108 8 Installation Connecting the solar modules (DC) 1. Pull out the cover caps of the DC connections. 2. Insert the metal brackets to support the DC cables. 3. Plug in the DC cables. 4. The illustration on the left shows how the wiring should look when all DC connections are occupied.
  • Page 109 8 Installation Completing electrical installation 8.10 Completing electrical installation If you have connected a PC for commission- ing (see “8.7.9 Connecting a PC via RS485 (optional)”, page 99), you must disconnect the PC from the inverter again after commissioning! 1. Remove the Allen key from the top of the door. 2.
  • Page 110 8 Installation Completing electrical installation 3. Close the lower door latch and screw on the cover. 2,45 Nm 4. Insert the Allen key into the upper door lock. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 111 Setting all parameters. ● Updating the firmware. LED indicator 9.1.3 Delta Service Software (DSS) Grid Grid LED: green The Delta Service Software is available for Windows PCs. It can Alarm Alarm LED: red / yellow be downloaded from partnerportal.delta-emea.com (registration required). Comm.
  • Page 112 9 Commissioning LED indicator Grid Alarm Explanation 1s/1s Boot sequence. The inverter is connected to the grid. Inverter failure. Power-off via external signal. 1s/1s Inverter warning. 1s/1s Solar panel system failure. 1s/1s Solar system warning. 5s/10s No DC. Also appears when both DC disconnectors are open. 0.25s 0.25s DC problem.
  • Page 113 Once you have changed the RS485 protocol to SUNSPEC, you can no longer ac- cess the inverter with the DeltaSolar app! ► To reset the RS485 protocol to the DELTA, see “9.6.9 Changing the RS485 protocol to DELTA (optional)”, page 130.
  • Page 114 9 Commissioning Commissioning with the DeltaSolar app 9.6.2 Basic Settings Start the DeltaSolar app and enter your login details. Tap the Bluetooth icon. Create an account if you do not already have one. Tap the serial number of the inverter. Move closer to the The DeltaSolar app connects to the inverter.
  • Page 115 Tap Local Setting. Enter the service code and tap Submit. The service The grid settings of the inverter are loaded. code can be obtained from Delta Customer Service. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 116 9 Commissioning Commissioning with the DeltaSolar app In the Installation settings section, tap Select coun- Set the inverter ID and save . Each inverter in try. the PV system must have a different ID. To save the country or grid standard, tap Set in the Select the country or grid standard .
  • Page 117 9 Commissioning Commissioning with the DeltaSolar app The inverter is automatically set up according to the Acknowledge the message that appears after saving. selected country. If you wish to make further settings, stay in the Grid settings This completes the basic settings and the inverter goes into feed-in operation after a few seconds.
  • Page 118 9 Commissioning Commissioning with the DeltaSolar app 9.6.3 Arc detection (optional) Arc detection is deactivated at the factory. This section describes how to activate this feature with the DeltaSolar app and which setting options are available. The descriptions in this section apply to the M50A Flex, M70A Flex and M100A Flex inverters.
  • Page 119 9 Commissioning Commissioning with the DeltaSolar app To save, tap Set at the end of the ARC section. Acknowledge the message that appears after saving. Arc detection is activated. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 120 9 Commissioning Commissioning with the DeltaSolar app 9.6.4 AC connection (optional) The AC connection is set with a neutral conductor (3P4W) at the factory. If the AC connection is set without a neutral conductor (3P3W), the AC connection parameter must be changed.
  • Page 121 9 Commissioning Commissioning with the DeltaSolar app To save, tap Set at the end of the Installation settings Acknowledge the message that appears after saving. section. The setting of the AC connection is complete. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 122 9 Commissioning Commissioning with the DeltaSolar app 9.6.5 Anti-PID (optional) Potential-induced degradation (PID) occurs when high voltage How it works differences between PV cells and ground potential lead to a The function is active when a tripping time > 0 is set. When buildup of charge.
  • Page 123 9 Commissioning Commissioning with the DeltaSolar app To save, tap Set at the end of the PID section. Acknowledge the message that appears after saving. The setting of the anti-PID function is complete. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 124 9 Commissioning Commissioning with the DeltaSolar app External power off (EPO, emergency power off) 9.6.6 (optional) The relay for the external power off (emergency power off) can be defined as a normally closed or normally open contact. This parameter is located under Grid settings in the Installation set- tings section.
  • Page 125 9 Commissioning Commissioning with the DeltaSolar app To save, tap Set at the end of the Installation settings Acknowledge the message that appears after saving. section. The setting of the relay for the external power off is com- plete. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 126 Change this setting only after consultation with Delta customer service. Activate or deactivate the insulation mode and set the insulation resistance. These parameters are located under Grid settings in the Installation settings section.
  • Page 127 9 Commissioning Commissioning with the DeltaSolar app To save, tap Set at the end of the Installation settings Acknowledge the message that appears after saving. section. The setting of the insulation mode is complete. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 128 9 Commissioning Commissioning with the DeltaSolar app If you are not yet back in the Installation settings sec- 9.6.8 Changing the RS485 protocol to SUNSPEC tion, tap Back. (optional) The settings for the RS485 protocol can be found under the menu item Local settings > Mainte- nance >...
  • Page 129 9 Commissioning Commissioning with the DeltaSolar app Enter the service code and tap Submit. Tap Change to Sunspec protocol. Acknowledge the message that appears after saving. The SUNSPEC protocol is set. The DeltaSolar app sepa- rates from the inverter. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 130 Changing the RS485 protocol to DELTA (op- Tap the Bluetooth icon. tional) The RS485 protocol must be changed to DELTA protocol in order to be able to access the inverter with the DeltaSolar app. The settings for the RS485 protocol can be found under the menu item Local settings >...
  • Page 131 9 Commissioning Commissioning with the DeltaSolar app The changeover to the DELTA protocol is complete. Do not forget to switch back to SUNSPEC after completing the settings! See “9.6.8 Changing the RS485 protocol to SUNSPEC (optional)”, page 128. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 132 9 Commissioning Commissioning with the Delta Service Software (DSS) Commissioning with the Delta Service Software (DSS) 9.7.1 Prerequisites ● All inverters are supplied with power and switched on. ● All inverters in the system are connected with one another via RS485.
  • Page 133 9 Commissioning Commissioning with the Delta Service Software (DSS) 1. Select RS485 2. Under Monitor Mode , select the inverter type 3. Select Broadcast to access all inverters in the RS485 bus. 4. Select the COM port in which the USB/RS485 adapter is inserted It is usually the last entry.
  • Page 134 9 Commissioning Commissioning with the Delta Service Software (DSS) 8. Adjust the inverter IDs if necessary and save them by pressing Set 9. Select the country or grid type and save by pressing Set þ The standard commissioning with the Delta Service Software has been com- pleted.
  • Page 135 To read error messages or change parameter 1. Turn both DC isolating switches to the OFF settings, you need the Delta Service Software position. (DSS) or the DeltaSolar app. 2. Disconnect the inverter from all AC and DC...
  • Page 136 The grid connection of the inverter must be kept away from non-linear loads; if necessary, move it further away. Non-linear load in the grid and in the vicinity of the inverter. If this error occurs repeatedly, contact Delta Customer Service. AC cable is not connected correctly.
  • Page 137 The polarity of the DC string is reversed. Connect the DC strings correctly. The string monitoring circuit is defective. Contact Delta Customer Service. One or more fans are blocked. Clean or replace the fans if necessary. One or more fans are defective.
  • Page 138 10 Error events and troubleshooting Faults 10.4 Faults Fault num- Possible causes Suggestions for resolution The grid waveform is abnormal. Contact Delta Customer Service. F01, F02, Internal error. Contact Delta Customer Service. The ambient temperature is > 60°C. Check the system environment. F06, The ambient temperature is >...
  • Page 139 Check the grid waveform. The grid connection of the inverter must be kept away from non-linear loads; if neces- sary, move it further away. Internal error. Contact Delta Customer Service. Internal error. Contact Delta Customer Service. F60, F61, Internal error.
  • Page 140 11 Disconnecting the inverter from the power supply before working on it Disconnecting the inverter from IMPORTANT the power supply before working Handling aluminum cables on it To ensure safe and reliable contact with aluminum conduc- tors, always perform the following work steps: ►...
  • Page 141 11 Disconnecting the inverter from the power supply before working on it Procedure 11.2 Procedure 1. To shut off the inverter at the grid, open the load-break switch between the inverter and the grid connection point. Secure the load-break switch to prevent it from being switched back on.
  • Page 142 11 Disconnecting the inverter from the power supply before working on it Procedure 5. Remove the Allen key from the upper door lock. 6. Unscrew and open the upper door lock cover. 7. Unscrew and open the lower door lock cover. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 143 11 Disconnecting the inverter from the power supply before working on it Procedure 8. Open the upper and lower door lock. 9. Open the door and secure it on top with the Allen key. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 144 11 Disconnecting the inverter from the power supply before working on it Procedure 10. Use a voltmeter to check that there is no more voltage at the AC terminal block. → If you detect voltage, open the AC power external load isolating switch.
  • Page 145 11 Disconnecting the inverter from the power supply before working on it Procedure 12. Unscrew the conductors of the AC cable and pull out the AC cable. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 146 12 Replacing or cleaning components, installing accessories Safety instructions 12. Replacing or cleaning compo- nents, installing accessories 12.1 Safety instructions DANGER Electric shock Potentially fatal voltages are present in the inverter during operation. When the inverter is disconnected from all power sources, this voltage remains in the inverter for up to 60 seconds.
  • Page 147 12 Replacing or cleaning components, installing accessories General information 12.2 General information For the following work, the inverter must be disconnected from the power supply. ● Clean/replace internal fans ● Cleaning/replacing the fan module ● Replacing DC surge protection devices ●...
  • Page 148 12 Replacing or cleaning components, installing accessories Clean/replace internal fan 2 12.3 Clean/replace internal fan 2 DANGER Electric shock Potentially fatal voltages are present in the inverter during operation. When the inverter is disconnected from all power sources, this voltage remains in the inverter for up to 60 seconds.
  • Page 149 12 Replacing or cleaning components, installing accessories Clean/replace internal fan 2 2. Unscrew and pull out the cover. The fan is screwed onto the cover. This work step must only be carried out if the fan is to be replaced. The work step is not necessary for cleaning the fan.
  • Page 150 12 Replacing or cleaning components, installing accessories Clean/replace internal fan 2 4. Clean the fan and metal housing with compressed air or a firm brush. This work step must only be carried out if the fan is to be replaced. The work step is not necessary for cleaning the fan.
  • Page 151 12 Replacing or cleaning components, installing accessories Clean/replace internal fan 2 6. Insert the cover with the fan attached and screw the cover in place. 7. Plug in the power supply cable plug. 8. To complete the work, follow the instructions in the chapter “13.
  • Page 152 12 Replacing or cleaning components, installing accessories Clean/replace internal fan 1 12.4 Clean/replace internal fan 1 DANGER Electric shock Potentially fatal voltages are present in the inverter during operation. When the inverter is disconnected from all power sources, this voltage remains in the inverter for up to 60 seconds.
  • Page 153 12 Replacing or cleaning components, installing accessories Clean/replace internal fan 1 2. Pull out the power supply cable plug located on the bottom of the card with the DC surge protection devices. 3. Unscrew and pull out the cover. The fan is screwed onto the cover.
  • Page 154 12 Replacing or cleaning components, installing accessories Clean/replace internal fan 1 This work step must only be carried out if the fan is to be replaced. The work step is not necessary for cleaning the fan. ∫ 4. Unscrew the fan from the cover. 5.
  • Page 155 12 Replacing or cleaning components, installing accessories Clean/replace internal fan 1 This work step must only be carried out if the fan is to be replaced. The work step is not necessary for cleaning the fan. ∫ 6. Screw the fan to the cover by tightening both screws. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 156 12 Replacing or cleaning components, installing accessories Clean/replace internal fan 1 7. Insert the cover with the fan attached and screw the cover in place. 8. Plug in the power supply cable plug. 9. Insert the cover for the DC surge protection devices. 10.
  • Page 157 12 Replacing or cleaning components, installing accessories Cleaning/replacing the fan module 12.5 Cleaning/replacing the fan module DANGER Electric shock Potentially fatal voltages are present in the inverter during operation. When the inverter is disconnected from all power sources, this voltage remains in the inverter for up to 60 seconds.
  • Page 158 12 Replacing or cleaning components, installing accessories Cleaning/replacing the fan module 1. Unscrew and remove the fan module. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 159 12 Replacing or cleaning components, installing accessories Cleaning/replacing the fan module 2. Pull out the power supply cable plugs. 3. Clean the fan module with a compressed air cleaner or a firm brush. 4. Insert the plugs of the power supply cables until they snap into place.
  • Page 160 12 Replacing or cleaning components, installing accessories Cleaning/replacing the fan module 5. Insert the fan module so that the power cables are on the right side of the fan module. 6. Screw on the fan module. 7. To complete the work, follow the instructions in the chapter “13.
  • Page 161 12 Replacing or cleaning components, installing accessories Cleaning the air outlet 12.6 Cleaning the air outlet The air outlet can be removed and installed while the inverter is running. The screws are very small and can easily fall down. You should therefore use a magnetic screwdriver.
  • Page 162 12 Replacing or cleaning components, installing accessories Cleaning the air outlet 2. Clean the air outlet with a compressed air cleaner or a firm brush. 3. Insert and screw on the air outlet. The fins must be facing downward. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 163 12 Replacing or cleaning components, installing accessories Cleaning the air outlet 1,4 Nm 4. To complete the work, follow the instructions in the chapter “13. Recommissioning the inverter after work”, page 176. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 164 12 Replacing or cleaning components, installing accessories Installing/replacing DC surge protection devices 12.7 Installing/replacing DC surge protection devices DANGER Electric shock Potentially fatal voltages are present in the inverter during operation. When the inverter is disconnected from all power sources, this voltage remains in the inverter for up to 60 seconds.
  • Page 165 12 Replacing or cleaning components, installing accessories Installing/replacing DC surge protection devices 1. Remove the cover from the DC surge protection devices. 2. Pull out the three cables at the bottom end of the card. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 166 12 Replacing or cleaning components, installing accessories Installing/replacing DC surge protection devices The two mounting screws on the left are only pushed through and can easily fall down! The screws on the DC bus cannot fall out. 3. Loosen all screws and remove the card. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 167 12 Replacing or cleaning components, installing accessories Installing/replacing DC surge protection devices 12.7.2 Transfer the screws for the new DC surge protection devices 1. Unscrew the 10 screws on the right (for the DC bus) on the old DC surge protection devices. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 168 12 Replacing or cleaning components, installing accessories Installing/replacing DC surge protection devices Do not insert the two mounting screws on the left until the card is already screwed on! 2. Screw the 10 screws on the right (for the DC bus) includ- ing spring washers and washers into the new DC surge protection devices.
  • Page 169 12 Replacing or cleaning components, installing accessories Installing/replacing DC surge protection devices 12.7.3 Install DC surge protection devices It is best to first screw the card to the DC bus with the screws on the right. Then tighten the two mounting screws on the left. 1.
  • Page 170 12 Replacing or cleaning components, installing accessories Installing/replacing DC surge protection devices 2. Connect the three cables to the bottom end of the card. 3. Insert the cover for the DC surge protection devices. þ The replacement of the DC surge protection devices is complete.
  • Page 171 12 Replacing or cleaning components, installing accessories Replacing type 2 AC surge protection devices 12.8 Replacing type 2 AC surge protection devices 12.8.1 Notes DANGER Electric shock Potentially fatal voltages are present in the inverter during operation. When the inverter is disconnected from all power sources, this voltage remains in the inverter for up to 60 seconds.
  • Page 172 12 Replacing or cleaning components, installing accessories Replacing type 2 AC surge protection devices 2. Pull out both cables from the card. The two mounting screws on the right are only pushed through and can easily fall out 3. Loosen both screws and remove the card. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 173 12 Replacing or cleaning components, installing accessories Replacing type 2 AC surge protection devices Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 174 12 Replacing or cleaning components, installing accessories Replacing type 2 AC surge protection devices 12.8.3 Installing type 2 AC surge protection devices 1. Install the new card and tighten all screws. 0,8 Nm 2. Connect both cables to the card. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 175 12 Replacing or cleaning components, installing accessories Replacing type 2 AC surge protection devices 3. Install and screw on the cover. 0,8 Nm þ Installation of the type 2 AC surge protection devices is complete. 4. To complete the work, follow the instructions in the chapter “13.
  • Page 176 13 Recommissioning the inverter after work Safety and general instructions 13. Recommissioning the inverter IMPORTANT after work Working in freezing conditions In frosty conditions, the rubber seal of the front door can freeze to the enclosure, tear when opened and thus become leaky.
  • Page 177 13 Recommissioning the inverter after work When fitting the seals, make sure that the claws hook correctly into the groove of the largest sealing ring. Feed the cable from the bottom or back. Insert the cable hori- zontally so that the sealing rings of the AC cable gland are tight. If the cable is inserted from above and tilted, water could enter.
  • Page 178 13 Recommissioning the inverter after work Procedure 13.2 Procedure 1. Open the load-break switch between the inverter and the grid connection point. Secure the load-break switch to prevent it from being switched back on. 2. Turn both DC isolating switches to the OFF position. 3.
  • Page 179 13 Recommissioning the inverter after work Procedure 4. Tighten the AC cable gland. 5. Remove the Allen key from the top of the door. 6. Close the door. 7. Close the upper door latch and screw on the cover. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 180 13 Recommissioning the inverter after work Procedure 2,45 Nm 8. Close the lower door latch and screw on the cover. 2,45 Nm Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 181 13 Recommissioning the inverter after work Procedure 9. Insert the Allen key into the upper door lock. 10. Plug in the DC cables. 11. Close the isolating switch between the inverter and the grid connection point or inverter and the solar modules. 12.
  • Page 182 14 Replacing the inverter/taking out of operation 14. Replacing the inverter/taking out WARNING of operation Electric shock The IP66 protection degree is no longer guaran- teed when the door is open. ► Only open the door when absolutely DANGER necessary. Electric shock ►...
  • Page 183 ► Open the front door slowly. It is best to wait before removing the old inverter until you have received the replacement device from Delta Electronics. There is normally an isolating switch (for example in an equipment wiring box) between the inverter and the grid connection box and between the inverter and the solar modules.
  • Page 184 If you are continuing to use the components of the old inverter, attach the appropriate parts of the replacement device to the old inverter before returning it to Delta Electronics. This is also necessary to ensure that all openings of the inverter are properly closed and that no moisture can enter during transportation.
  • Page 185 14 Replacing the inverter/taking out of operation Sequence of work steps 14.2 Sequence of work steps Step Notice Description in chapter “14.4 Disconnecting the inverter from the grid (AC) Disconnect the inverter from AC and DC and solar modules (DC)”, page 186 Remove the communication cable “14.5 Remove the communication cable”, page 187 Dismantling the type 1+2 combined DC...
  • Page 186 14 Replacing the inverter/taking out of operation Disconnecting the inverter from the grid (AC) and solar modules (DC) 14.4 Disconnecting the inverter from the grid (AC) and solar modules (DC) ► Perform the instructions listed in chapter “11. Disconnect- ing the inverter from the power supply before working on it”, page 140 Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 187 14 Replacing the inverter/taking out of operation Remove the communication cable 14.5 Remove the communication cable 1. Remove all cables from the communication card. 2. Unscrew the cable gland of the communication connection and remove the cable, cable gland and seal. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...
  • Page 188 14 Replacing the inverter/taking out of operation Dismantling the type 1+2 combined DC surge protection device (optional) 14.6 Dismantling the type 1+2 combined DC surge protection device (optional) If you have installed the optional type 1+2 com- bined DC surge protection devices, you must remove them (see “12.7.1 Remove the DC surge protection device”, page 164) before returning the inverter.
  • Page 189 14 Replacing the inverter/taking out of operation Removing and packing the inverter 14.7 Removing and packing the inverter WARNING Heavy weight The inverter is heavy. ► Lift and carry the inverter with at least 2 people. 1. Unscrew the grounding cable on the inverter. 2.
  • Page 190 4. Place all components of the replacement device that will not be needed back into the box. 5. Package and ship the old inverter in accordance with the description received from Delta Customer Service. 6. Install and commission the new inverter in accordance with the installation instructions supplied.
  • Page 191 The battery is permanently installed in the inverter and must only be replaced by qualified electrical personnel. Qualified electrical personnel can contact Delta Customer Ser- vice for any questions regarding battery removal. You can find the contact information on the last page of this manual.
  • Page 192 16 Technical Data 16. Technical Data Input (DC) M100A 25.2 kW/110 kW Maximum input power (per MPP Tracker/total) 100 kW Rated power 200 to 1000 V Input voltage range for operation 1100 V Max. input voltage 610 V Nominal voltage 520 to 840 V MPP voltage range with maximum power Number of MPP trackers...
  • Page 193 RS485, Bluetooth® Communication Modbus RTU Communication protocols General specifications M100A M100A_280 Delta model name RPI104M280000 Delta part number -25 to +60°C Overall operating temperature range 0 to 100%, non-condensing Relative humidity 4000 m above sea level Max. operating height <...
  • Page 194 Other European countries +49 7641 455 549 © Copyright – Delta Electronics (Germany) GmbH – All rights reserved. All information and specifications can be modified without prior notice. Installation and Operating Manual for Solar Inverter M100A_280 Flex RPI104M280xxx EU V4.0 EN 2025-06-18...