Studer NEXT3 Tech Manual
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Studer NEXT3 Tech Manual

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Accessories:
Remote control and communication....
Battery temperature sensor....................
Cables for communication..................
Studer Innotec SA 2021
4O9B
V 1.2

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  • Page 1 Accessories: Remote control and communication…. Battery temperature sensor…....Cables for communication……………… Studer Innotec SA 2021 V 1.2 4O9B...

  • Page 2: Table Of Contents

    Storage ............................9 Dimensions ............................9 4.3.1 Dimensions of wall mounted next3 ..................9 4.3.2 Dimensions of the 19’’ rack next3 ..................10 4.3.3 Dimensions of the nx-interface ....................11 Unpacking and mounting ......................12 4.4.1 Mounting place ........................12 4.4.2...
  • Page 3 Update ............................69 7.3.3 Installation Configuration......................71 7.3.4 Monitoring & dataloging ......................73 CONFIGURATION AND OPERATION OF THE NEXT3 ENERGY SYSTEM ..........77 Essentials to know about a next3 system .................. 77 8.1.1 Understand the General Energy Strategy ................78 8.1.2 Standard use cases .........................

  • Page 4: Introduction

    The next3 is available in models without the solar charger or without the AC- transfer to fit in various types of systems.

  • Page 5: Glossary

    AC source, or for a use as a controlled secondary AC loads. • AC-Transfer: with “transfer” we mean the fact that the AC-Source is connected to the AC- Loads with the internal relays of the next3. • PE: Protective Earth •...

  • Page 6: General Information

    IEC/EN 62477 for power converters used in general systems. General information that can help you for system design can be found in the Studer System Design Book. Schematics and explanations for various specific cases can be found in “ next3 Systems design : Application notes, typical configurations and schematics”.

  • Page 7: Important Safety Instructions

    (CH). The warranty for this equipment depends upon the strict application of the instructions in this manual. The next3 inverter has a six (6) years warranty (starting from the date of purchase) against material and manufacturing defaults. The defective product will be either repaired or replaced at the discretion of Studer Innotec.

  • Page 8: Exclusion Of Liability

    Studer Innotec reserves the right to make any modifications to the product without prior notification. Studer Innotec is not liable for incidental, direct or indirect damages of any kind, including any profit loss, revenue loss or damages caused to equipment or goods due to defective equipment.

  • Page 9: Handling And Mounting

    Never lift the device by handling the plastic cover part! If the next3 is installed in a closed cabinet, it must have a sufficient ventilation to guarantee that the ambient temperature is kept within the operating limits of the next3.

  • Page 10: Dimensions Of The 19'' Rack Next3

    Studer Innotec SA next3 4.3.2 Dimensions of the 19’’ rack next3 This is a preliminary view, subject to changes. V 1.3 © Studer-Innotec SA next3 Tech manual...

  • Page 11: Dimensions Of The Nx-Interface

    The nx-interface can be fixed on the inverter with dedicated mounting frame or remotely wall mounted. It can also be integrated on a control panel. See the mounting section for details of installation. See the Wiring chapter for cabling of communication. Technical user manual V1.3 © Studer-Innotec SA...

  • Page 12: Unpacking And Mounting

    Temperature sensor nx-tempSensor (with male connector) • Mounting plate (for wall mounted version) with 1 screw for fixing on the body of the next3. The screws for the wall are not provided. Choose the appropriate screws for your wall. •...

  • Page 13: Unpacking And Mounting Process

    4.4.2 Unpacking and mounting process 1. Unscrew the 8 screws situated on the side of the casing. 2. Remove top cover. 3. Take the manual, the fixation structure, check the content. Technical user manual V1.3 © Studer-Innotec SA...
  • Page 14 4. Remove the external casing 5. cut the strings maintaining the next 3 to the bottom of the casing. 6. fix the 4 handles on the two sides of the next3 and remove the loops if you don’t need them to move the next3.
  • Page 15 The diameter of the holes in the plate are meant for 8mm screws. In vehicles (road or marine), or when the support undergoes significant vibrations, the next3 is to be mounted on anti-vibration elements. The fixing belt use is mandatory in those cases.
  • Page 16 Studer Innotec SA next3 The next3 is a heavy equipment (~60kg) and must be mounted to a support/structure designed to bear such a load. It is imperative to ensure a complete and safe fastening of the equipment. If simply hung, it may fall down and cause severe damages.
  • Page 17 The ethernet cable (LAN) goes on the right. See the wiring sections for details. Special installation on the wall or in a cabinet is shown in the following chapter below. 12. Open the bottom panel and proceed to wiring. Technical user manual V1.3 © Studer-Innotec SA...
  • Page 18 Use suitable screws and buffers. maximum diameter of the screws is 8mm. Maintain a space of 3mm between the screw head and the wall. V 1.3 © Studer-Innotec SA next3 Tech manual...
  • Page 19 You can buy your own ethernet cable for communication; it must be ethernet cat5 with 26AWG. The maximal distance between the inverter and the nx-interface depends then on the rest of the cabling. The total communication cable length in one system for the Studer-nx-bus is 75m. Technical user manual V1.3 © Studer-Innotec SA...
  • Page 20 Observe the maximum tightening torque of the fastening screws of the mounting elements otherwise they may be damaged. Tighten the fastening screws of the mounting elements to a maximum Torque of 0.2Nm. V 1.3 © Studer-Innotec SA next3 Tech manual...

  • Page 21: Wiring

    Studer Innotec SA next3 5 WIRING This chapter covers the wiring/cabling of the next3 installation before powering it ! 5.1 G ENERAL OVERVIEW 5.1.1 System block diagram The general schematic diagram of the next3 st is given below: Technical user manual...

  • Page 22: General Recommendations

    The next3 falls within protection class I. It has a PE connection terminal. It is mandatory that a protective earth is connected to the AC-Source and/or AC-Loads PE terminals. An additional protective earth is located at the bottom of the unit.

  • Page 23: Connections Overview

    Open the connection compartment by removing front cover: AC-Loads AC-Flex L1-L2-L3-N L1-L2-L3-N AC-Source BAT+ L1-L2-L3-N BAT- AC PE earth Button connection battery clock (RTC) Technical user manual V1.3 © Studer-Innotec SA...
  • Page 24 Sunclix PV connectors Button 3.3 V (CR-2032) lithium-ion type Used as a permanent supply for the battery for battery socket internal clock to keep time when the next3 is not connected to a battery. V 1.3 © Studer-Innotec SA next3 Tech manual...
  • Page 25 Communication and I/O connections: See corresponding chapter for detailed wiring and protocol in use. Pos. Denomination Description Comment Connector for the battery Only connect the original Studer nx- tempSensor temperature sensor. tempSensor. Two connectors for internal Only nx-bus compatible device can be communication between connected.

  • Page 26: Tightening Torques

    / Cable gland Max -Min Section DC [mm2] 2x 95 - 2x 70 / M32 / Cable gland Max section auxiliary relay, digital input, CAN and RS485 [mm2] Max PV cable [mm2] for Sunclix V 1.3 © Studer-Innotec SA next3 Tech manual...

  • Page 27: Connecting The Battery

    The next3 is a device which DC (battery) connection is to be connected exclusively to a 48V battery. Due to high power of the next3, the battery cables are separated in two entries in parallel to have a more convenient handling. The recommended battery cable size is 70mm2 for a total of 140mm2 with two cables in parallel.

  • Page 28: Dimensioning The Battery

    As rule of thumb, the maximum power of a lead acid battery is given with the capacity divided by five (C/5), in that case if all the power of the next3 is wanted (16kW), the capacity of the battery should be at least16000*5/48=1666 Ah.

  • Page 29: Battery Cable Cross-Section, Dc Protective And Disconnection Devices

    For lead acid batteries, an individual measurement of each cell is recommended. Any divergent values can be a sign of problem. To avoid any further loss and protection redundancy, the next3 does not have an internal fuse. The battery cables must be protected by one of the following measures:...
  • Page 30 Insufficient tightening may cause dangerous heating at the connection point. During the first start of the unit, it is necessary to check that the parameter values of the next3 are consistent with the recommendations of the battery manufacturer. Non- conforming values may be dangerous and/or seriously damage the batteries.

  • Page 31: Earthing Of Battery

    For ungrounded battery systems, always check that they are not inadvertently grounded before starting to work on the batteries. Always carefully follow the instructions of the battery manufacturer. Technical user manual V1.3 © Studer-Innotec SA...

  • Page 32: Battery Temperature Sensor Connection (Nx-Tempsensor)

    BMS. The nx-tempSensor temperature is recorded in the datalog. V 1.3 © Studer-Innotec SA next3 Tech manual...

  • Page 33: Battery With Communicating Bms: Can Connection

    For a point-to-point connection, the bus termination should be set to T (Terminated). If the device is in the middle of a daisy chain, the termination is set to O (Open). Generally, the next3 is connected point to point to the BMS and the termination should be on T. Technical user manual...

  • Page 34: Connecting The Ac (Alternative Current)

    AC-Loads: connection for the loads, that are supplied by the inverter. The 230 V and 400V consumers must be connected on the "AC-Loads" connection terminals with the wire cross- section conforming to the standards regarding the rated current at the next3 output. •...

  • Page 35: Sizing Of Ac Protective Devices

    The next3 is protected against overload and short-circuit and will stop in those cases. When connected to a source, the upstream protection must stop short-circuits currents from the grid/genset.
  • Page 36 If the AC-source is not used the protective device will be sized equal or smaller than the smaller value indicated on the nameplate. The next3 is intended to be supplied by alternative voltage sources such as the grid or a generator. Check that the rated voltage of the source corresponds to the rated voltage of the next3 model specified on the nameplate on the side of the next3.

  • Page 37: Ac Neutral And Earthing System

    5.3.2 AC Neutral and Earthing system The next3 is a unit with protection class I, which is intended for cabling in a grid type TT, TN-S or TNC- S. Its metal case must be earthed. The earthing of the neutral conductor is carried out at a sole installation point, upstream of the RCD circuit breaker (in domestic application, generally type A, 30 mAac).
  • Page 38 In a stationary installation where the neutral is connected to the earth at a single installation point upstream of the next3, it is permissible to carry out a connection of the neutrals to preserve an unchanged earthing system downstream, independent of the operating mode of the next3. This is called “Solid Neutral”.
  • Page 39 All sockets and protection class I devices connected downstream of the next3 must be properly connected to the earth (earthed socket). The cabling rules above remain valid, including in installations, in all cases where the next3 input is connected to the grid via a plug connector.

  • Page 40: Connecting The Photovoltaic Generator

    ONNECTING THE HOTOVOLTAIC GENERATOR The next3 has an internal solar charge controller made of two independent MPPTs. Each MPPT can support up to 22Adc of photovoltaic (PV) current in operation. For this reason, each MPPT has 2 inputs and up to 4 strings can be connected to the device. The two inputs of the top (MPPT1) are connected internally, as well as the two at the bottom (MPPT2).
  • Page 41 In any case, the next3 will limit the PV current and/or the charging current (battery) to the rated and/or programmed currents. All those limitations are automatically managed by the next3 and there is no risk in case of over dimensioning the PV input power/current.

  • Page 42: Connection

    These combinations in series and in parallel must be carried out according to the voltage and current limits of the next3 MPPT inputs. An example is provided below for a single MPPT string (example with 310W modules, 60 cells, 41Voc).

  • Page 43: Earthing Of Pv

    The MPPT topology is non-isolated for best efficiency, so the poles of the PV must not be grounded. The electronics was designed to avoid fluctuating voltages on the PV poles. In operation, there is a Technical user manual V1.3 © Studer-Innotec SA...

  • Page 44: Cables And Cross-Section

    5.4.4 Cables and cross-section The next3 is build from factory with Phoenix Sunclix connectors for the PV inputs of the MPPTs. There are4 pairs of Sunclix connectors provided with the unit to assemble on your PV wires arriving to the unit.

  • Page 45: Protection Devices

    If you wish to install two PV strings in parallel for one MPPT, this can be assembled as well out of the Next3, for example in the junction box on the roof. This can minimize the number of cables used.

  • Page 46: Connecting The Studer Communications Cables

    O (open) position. If one of the two connectors is not in use, the termination switch will be in position T. In a system comprising a single next3, the connection of the nx-interface or nx-gateway units may be conducted without stopping the next3 (hot plug).

  • Page 47: Connection Of The Nx-Interface

    Studer nx bus Termination The state of the Studer nx bus termination on the nx-interface can be seen on the screen, this is only for the connectors situated on the nx-interface. Note: the RS-485i and the CANi on the nx-interface are unused for the moment.
  • Page 48 Studer Innotec SA next3 V 1.3 © Studer-Innotec SA next3 Tech manual...

  • Page 49: Connection To Internet

    The connection to your LAN and internet is done exclusively in the nx-interface on the Ethernet port. In remote area, you can find your own GSM 3G/4G/5G router (not provided). Studer-Innotec is not responsible for the proper operation of those devices and of your internet connection.

  • Page 50: Wiring Auxiliary I/O

    There are two reversing contacts that are potential-free available in nx3 unit. Various settings are available to give activation conditions to each contact. To program functions to these contacts, please refer to the chapter about the configuration of the next3 and the section about the auxiliary contact in this manual.

  • Page 51: Command Inputs

    (in1 or in2) Entry impedance is 10kOhm 5.7.3 RS485i A communication to accessories will be available in the future, keep updated… Technical user manual V1.3 © Studer-Innotec SA...

  • Page 52: Multi-Unit Configurations

    ULTI UNIT CONFIGURATIONS Up to three next3 units may be used on the same battery bank to create a high-power inverter-charger system. In multi-unit systems, next3 are interconnected via a communication bus that uses the “Studer nx communication bus”. Units should be close to each other (in the same room).

  • Page 53: Power-Up Of The Equipment

    (but it’s not advised). To power ON the next3 and all its functions: push the front panel button until you hear the first beep (or use the ON/OFF button of the nx-interface). After this, your next3 installation is in the following state (please note that it takes ~5sec to start all converters): •...

  • Page 54: Front Panel Led Indicator

    6.3 F RONT PANEL INDICATOR The front panel has the necessary information to understand the state of the next3 with the LED lights. ON-OFF The table hereunder describes the information or type of error according to the number of times an indicator flashes.
  • Page 55 LEDs. • When powering up the next3 with the battery, all LEDs blink once during the start check. • All LEDs can blink at the same time in an identification procedure (with nx-interface). It is...

  • Page 56: Beep Indicator (Buzzer)

    6.4 B EEP INDICATOR UZZER The sound produced by the next3 buzzer uses the same beep sequence as the central “!” red light flashing sequence. This buzzer can be deactivated/activated with the nx-interface This buzzer can also be deactivated/activated with the ne[xt] button of the front panel. The button must be pushed for 5 seconds <...

  • Page 57: Hmi: Use Of Nx-Interface

    This avoid mistakes and is the preferred way to configure the device. Individual settings are also accessible for each part of the next3. The factory values of these settings are reported in the table at the end of this manual.

  • Page 58: General Navigation And Use

    Example for the information screen of solar: Back on upper level Access to solar settings Access to solar list of (here the synoptic info view) Main menu Swipe to other MPP inputs (here are 20 inputs) V 1.3 © Studer-Innotec SA next3 Tech manual...

  • Page 59: Screens Map

    • LEVEL2: Information about each component (AC-source, Battery, solar,…) Many detailed information that can be obtained from the next3 about the inverters operation. For example the AC-reactive power of the phase 2 on the AC-source connection can be seen by going on the AC-source from the main synoptic.
  • Page 60 Full list of settings is in appendix of this manual. See the following chapter to have details about each component of the energy system (the solar, the AC-source, the AC-Flex, the battery, …). V 1.3 © Studer-Innotec SA next3 Tech manual...

  • Page 61: Embedded Documentation

    The full list of information and settings with their default values, units, ranges and explanations can be found in appendix at the end of this manual. The full list of messages is also in appendix of this manual. The same documentation is embedded in the nx-interface. Technical user manual V1.3 © Studer-Innotec SA...

  • Page 62: Accessibility

    The modification of the user level is done with codes in the nx-interface, in the remote control screen and then on View 000000 the configuration menu ( → Only: The codes are beside: Basic 815566 Expert professionals only V 1.3 © Studer-Innotec SA next3 Tech manual...
  • Page 63 The activation of this code is done in the remote control screen and then on the configuration menu ( ). It is available for experts only. → The unlock code can be freely chosen. Technical user manual V1.3 © Studer-Innotec SA...

  • Page 64: Displaying The State Of The Energy System On The Nx-Interface

    Power fluxes and state of the battery can be seen. In one blink you know what your production is, consumption and general state of the system. All powers are the sum of all devices and all phases. The same general overview is on the “locked screen”. V 1.3 © Studer-Innotec SA next3 Tech manual...

  • Page 65: Synoptic

    An important alert on one of the components can be seen with a change of color. It is associated with a warning or error and with a message explaining what happens. Technical user manual V1.3 © Studer-Innotec SA...

  • Page 66: Simple Chart

    In the gamma version the daily energies are shown in one bar graph. Power and battery timeseries will appear with future updates. 7.2.4 Messages List of messages/ events that happened to the system. V 1.3 © Studer-Innotec SA next3 Tech manual...

  • Page 67: The Nx-Interface Functionalities

    • Configuration of the installation: the wizard configuration is performed here. • Monitoring and internet: set connection to the Studer webportal and manage the datalog on the usb-key. 7.3.1 Remote Control This menu is for the nx-interface itself (Language, user level, brightness of the screen, …). The physical connections are also shown, with the positions of the bus terminations on the nx-interface: very useful to find them as they are a little bit hidden under the nx-interface.
  • Page 68 7.3.1.1 Date and time The next3 features a real time clock that allows among others to have a correct date and hour for the datalogging records. This clock must be set using the remote control nx-interface. Thanks to an internal battery, this setting is retained even when the equipment is disconnected from its voltage source (battery or PV).

  • Page 69: Update

    • Internet: The update via internet is not available and is a future feature for the next3. A new button will appear when ready. Press “search” for the source you want to use.
  • Page 70 Studer Innotec SA next3 When multiple elements are connected to the nx-interface I and to the next3 by the communication bus, it is possible that the software versions are not compatible. It is highly recommended to update the software of all components in the system to guarantee all functionalities.

  • Page 71: Installation Configuration

    7.3.3.1 Wizard The standard configuration of the next3 energy system is done with a configuration wizard. It is possible to modify single settings individually later the pages dedicated to each topic of the converter. On the first commissioning of the next3, the wizard will be automatically started, and all steps must be followed.
  • Page 72 Note: if the configuration of the system is different (different types of devices, not the same number of devices, …), the restauration of a configuration is not possible and config files will be refused. In that case you must start a new configuration with the wizard. V 1.3 © Studer-Innotec SA next3 Tech manual...

  • Page 73: Monitoring & Dataloging

    – Studer Easy Monitoring App is a simple and intuitive way to see the status of the system and its history. It is available in IOs and Android. The Easy Monitoring APP uses the webportal as backend and accounts must be created on the portal to use the APP.
  • Page 74 The internal memory of the next3 is limited and stores the data for a limited timeframe. The quantity of log data that can be stored in a next3 device depends on the type of next3 device (-s, -t, -st, …). Here is an indication of the data that can be stored in the next3: •...
  • Page 75 Studer Innotec SA next3 When removing the USB storage, always wait for the end of the data transfer and use the “eject” button for a proper end of operation. Technical user manual V1.3 © Studer-Innotec SA...
  • Page 76 7.3.4.2 Remote Monitoring (Internet) To come, not available in this version. The remote monitoring is done via the Studer Monitoring Portal: https://portal.studer-innotec.com To connect an installation on the web portal, you’ll need a to perform a pairing, which means you have to identify an installation and make the link to your portal account.

  • Page 77: Configuration And Operation Of The Next3 Energy System

    ▪ wizard configuration process. The next3 is an “offline UPS”, that means the AC main is supplied directly to the load with the internal transfer switch (no double conversion). This implicate that the voltage and frequency of the grid is the same on the loads side.

  • Page 78: Understand The General Energy Strategy

    The programming is done for each phase L1, L2 and L3 independently. That means for a multi-unit system with 3 next3, there can be up to 9 single phase controllable loads used.
  • Page 79 Note: in expert mode, it is possible to change the value of the “SOC for backup” setting. Battery is loaded up to the SOC for grid feeding level. SOC for grid feeding is 100% by default but it can be modified in advanced mode. Technical user manual V1.3 © Studer-Innotec SA...
  • Page 80 +2% higher. That means the battery will go down to the SOC you adjusted but keeping that minimum voltage to reduce the discharging current. The SOC for grid feeding must be set higher than the SOC for backup. V 1.3 © Studer-Innotec SA next3 Tech manual...

  • Page 81: Standard Use Cases

    Studer Innotec SA next3 8.1.2 Standard use cases Illustrations are provided below for the 4 basic use cases of the next3. Grid connected installation with grid feeding allowed and use of battery for self-consumption optimization: Typical answers in the Wizard: •...
  • Page 82 During operation, all the limits and constraints are automatically managed by the NX3. Power production and storage is optimally dispatched in the system due to the OPFD technology (Optimal Power Flow Dispatcher). V 1.3 © Studer-Innotec SA next3 Tech manual...

  • Page 83: Configuration

    When an inverter/converter setting is modified using the remote control (nx- interface), it is sent to the next3 and stored in the device permanently. If the nx-interface is removed from the system, this parameter continues to be used by the next3 with this modified value.
  • Page 84 ‘O’ in between (when there are 2 communication cables to the device). In the next step, the system checks that 2 impdances are activated: The termination switch is at the bottom of the next3: set T for terminated and O for open And on the nx interface: V 1.3 ©...
  • Page 85 Those values cannot be changed later except with a complete reset of the system. In a multi-system, you must indicate which device is physically connected to the grid as there is only one device/transfer used per system. The selected device is blinking for a visual check. Technical user manual V1.3 © Studer-Innotec SA...
  • Page 86 Studer Innotec SA next3 • Then comes the genset question to know if there’s one in the system: V 1.3 © Studer-Innotec SA next3 Tech manual...
  • Page 87 230Vac. • All AC-flex that are not explicitly given as AC inputs will be configured as loads, even if there is no specific question asking for it. Technical user manual V1.3 © Studer-Innotec SA...
  • Page 88 Ex. for 500Ah: 500/5 = 100A. See manufacturer indication for details. If the battery has a communication BMS (typically for lithium battery), you’ll have to choose the manufacturer in the list for the next3 to use the proper communication protocol. Verify that the manufacturer is in the compatible list.
  • Page 89 Ah. Convert with the following formula: Capacity in kWh *1000/Battery voltage =Capacity in Ah For example, a 10kWh at 50V battery has 200Ah. At the end is the second important question for the energy strategy: Technical user manual V1.3 © Studer-Innotec SA...
  • Page 90 Final check: a summary of the installation is given and the configuration process is finished. Press “Start using the system!” After the first configuration with the wizard, the next3 is ready to be used. V 1.3 © Studer-Innotec SA next3 Tech manual...

  • Page 91: Ac-Source

    OURCE 8.3.1 General information The next3 is a hybrid inverter charger, that can work in a stand-alone (offgrid) mode or connected to an external AC source, being a grid or a generator. The next3 has a connection named “AC-Source” where the main AC source is connected: the grid or a generator.
  • Page 92 Similar view is given if a genset was configured for the AC-source: The full list of available information is accessible with the ‘+’ and is described in the appendix. Unique identification numbers are used to clearly identify each information value. V 1.3 © Studer-Innotec SA next3 Tech manual...

  • Page 93: Ac-Source Settings For Grid

    Concerning the grid code, the functions Q fix, Q(U), cosφ fix and cosφ(P) are implemented and can be configured, if necessary, after the wizard. The anti-islanding function implemented is based on the “vector shift” method. P(Q) diagram for grid feeding: Technical user manual V1.3 © Studer-Innotec SA...

  • Page 94: Ac-Source Settings For Genset

    The Observation Time can be understood as a delay for the genset to warmup. The tolerances on the voltage fluctuations of the genset can be adapted: V 1.3 © Studer-Innotec SA next3 Tech manual...
  • Page 95 Studer Innotec SA next3 Technical user manual V1.3 © Studer-Innotec SA...

  • Page 96: Solar Pv

    8.4.1 General information The next3 is a renewable energy friendly converter and always try to optimize the solar part in the system. For a standard user, there is nothing/little to modify for the solar converter: as soon as there is solar energy, the next tries to use it first.
  • Page 97 The total energy is the recorded since the first start of the next The saved fuel is computed on the base of a standard genset efficiency in hybrid systems (25% efficiency on diesel). Technical user manual V1.3 © Studer-Innotec SA...

  • Page 98: Solar Settings

    8.4.3 Solar Settings There is no “wizard screen” for solar part as the next3 is “plug n play” for standard applications. Connect PV modules with proper voltages according to the next3 specifications and as soon as there is sun, the solar charger works automatically.
  • Page 99 Enable Depolarisation: activation of a recovery process to eliminate Potentially Induced Degradation (PID). A negative voltage is set on the modules during the night. This effect happens only on the modules with crystalline silicon with back contacts. Technical user manual V1.3 © Studer-Innotec SA...

  • Page 100: Battery

    The next3 is a fully automatic charger designed to guarantee an optimum charge for the most used battery types: lead (liquid acid, gel or AGM), and Lithium among others. The next3 charger will use the energy either from solar or from the grid/genset. The choice of the battery type is done during the wizard at commissioning and cannot be changed during operation.

  • Page 101: Battery Settings

    BMS data is used in priority. The power and current shown in this display is correct only if there are only next3 compatible devices in the system or if there is a shunt measurement on the battery (not available yet, nx- shunt-BMS to come).
  • Page 102 SOC for Backup The grid is used to recharge the battery to this level to guarantee a minimal energy backup The battery cycle settings are useful and shown only for non-communicating batteries. V 1.3 © Studer-Innotec SA next3 Tech manual...

  • Page 103: Battery: Additional Explanations

    For this reason, the user will not be able to constantly discharge the battery without at least having recharged it. 8.5.4 Battery: additional explanations 8.5.4.1 Battery Cycle Technical user manual V1.3 © Studer-Innotec SA...
  • Page 104 1. Bulk phase The bulk phase is the stage where the next3 applies the maximum charging current (if there is enough energy available on solar and/or AC source) to charge the battery. This will lead to an increase of the battery voltage up to the next phase voltage limit; absorption, equalisation or floating, depending on the charging profile adjusted.
  • Page 105 By default, the equalization phase is forbidden because it is incompatible with gel and AGM batteries and these are the most used batteries in the field. It can be activated/deactivated by the dedicated parameter in the battery cycle settings. Technical user manual V1.3 © Studer-Innotec SA...
  • Page 106 For a floating voltage value set to 54.4V, the effective floating voltage (compensated) will be 54.04V at 30°C. Another example with 5°C, the compensation will be (5-25)*(-0.072) = +1.44V, so a floating voltage that goes from 54.4V to 55.84V. V 1.3 © Studer-Innotec SA next3 Tech manual...

  • Page 107: Ac-Loads

    AC-coupling of grid inverters is not permitted for the moment. 8.6.2 AC-Loads Information The general information on output is seen on the synoptic: Clicking on the component AC-loads give you access to the level 2 and see the details about AC- loads. Technical user manual V1.3 © Studer-Innotec SA...

  • Page 108: Ac-Loads Settings

    Normally there is only to activate this one. • Behaviour In overload: Number of restart attempts • Standby: to spare energy, the inverter will deliver a voltage pulse once per second. This allow V 1.3 © Studer-Innotec SA next3 Tech manual...
  • Page 109 The sensitivity of load detection can be set from 0.1% of the nominal power (15W) up to 1% (150W). Technical user manual V1.3 © Studer-Innotec SA...
  • Page 110 Studer Innotec SA next3 8.6.3.1 Detailed AC-Loads settings list The full list (expert level) of settings (Read/Write) and information (only Read) with their description are available in the appendix of this manual. V 1.3 © Studer-Innotec SA next3 Tech manual...

  • Page 111: Ac-Flex

    Studer Innotec SA next3 8.7 AC-F 8.7.1 General information The next3 has an AC connection that can be freely programmed as: • A second AC-Source, for example for Grid /genset in hybrid installations with grid and a generator backup that don’t require grid connections securities.
  • Page 112 Studer Innotec SA next3 V 1.3 © Studer-Innotec SA next3 Tech manual...

  • Page 113: Ac-Flex As Load; Settings

    Scheduled time: chose a time frame during the day to activate the contact. On-grid: This is used for example to connect some loads when connected to an AC- source if you don’t want to have them running on the batteries. Technical user manual V1.3 © Studer-Innotec SA...
  • Page 114 Battery charging state AC-Flex load relay is energized when the current battery charging state corresponds to one of the selected states in the following list: • None • Bulk • Reduced Floating • Floating V 1.3 © Studer-Innotec SA next3 Tech manual...
  • Page 115 Studer Innotec SA next3 • Periodical Absorption • Absorption • Equalization Multiple states can be selected. Technical user manual V1.3 © Studer-Innotec SA...
  • Page 116 Deactivation threshold Power [W] If the measured total active power load exceeds this value, the relay is deactivated. These 2 values are the boundaries of a hysteresis function. V 1.3 © Studer-Innotec SA next3 Tech manual...
  • Page 117 The hysteresis is given by 2 values configurable by the user: Activation threshold and deactivation threshold. According to the numerical values set into the 2 thresholds, the hysteresis can follow 2 distinct behaviours (figure below). Having a value attributed to activation threshold higher than the Technical user manual V1.3 © Studer-Innotec SA...
  • Page 118 Below an example of temporal restriction applied to a pre-set condition: Parameters: Activation Min. Delay 1 [sec] Deactivation Min. Delay 2 [sec] Activation Min. Time 4 [sec] Deactivation Min. Time 4 [sec] Activation Max. Time 15 [sec] Activation Hour Allow1 12 :00 V 1.3 © Studer-Innotec SA next3 Tech manual...
  • Page 119 Use this parameter with care and only as a security. 8.7.4.14 Detailed AC-FLEX settings list The full list (expert level) of settings and information with their description are available is in appendix of this manual. Technical user manual V1.3 © Studer-Innotec SA...

  • Page 120: Device And I/O: Aux Contacts, Inputs And Communication

    There are as many screens as the number of next that can be accessed with the left/right slide: 8.8.1 General points One next3 inverter is equipped with following interfaces: • 2 AUX-contacts: The auxiliary contacts are useful for simple automation tasks in energy systems such as load management, automatic start of generator, simple self-consumption optimisation, …...

  • Page 121: Device Information

    AUTO: some activation/deactivations conditions are used. This list of possibilities are exactly the same as for the Flex load and will not be repeated below. One setting is specific to AUX relays. It it is the Ext bypass for External bypass control. Technical user manual V1.3 © Studer-Innotec SA...
  • Page 122 Studer Innotec SA next3 This is related to the control of and set of relay providing redundancy between the grid and the next3 as seen on the schematic below: The implemented logic is: V 1.3 © Studer-Innotec SA next3 Tech manual...

  • Page 123: In-Cmd Settings

    The CmdEntry selection index gives which entry is taken into account. 8.8.5 RS485i Settings The RS485i connection is unused for the moment. Functionalities will be added in the future software updates. Keep in touch… Technical user manual V1.3 © Studer-Innotec SA...

  • Page 124: System Settings

    In any case, the protective earth must be connected in accordance with local standards and regulations in force. To do this, the next3 with transfer is equipped with a programmable earthing relay able to bond the Neutral wire (on Load side) to the earth (case of the device).

  • Page 125: Source Priority

    Automatic selection: the first AC source with voltage and frequency in the allowed range is used. • Main AC-source or grid: the AC-source connection has priority when configured for the grid (in multi-unit system the AC-source of an inverter can be configured as grid and another for Technical user manual V1.3 © Studer-Innotec SA...
  • Page 126 Studer Innotec SA next3 genset). • Secondary AC-source or genset • None: all are disabled V 1.3 © Studer-Innotec SA next3 Tech manual...

  • Page 127: Maintenance Of The Installation

    See battery manufacturer for specific advice on battery maintenance. • Clean regularly you PV panel to optimize the production, check the general state. The monitoring/datalogging of the next3 will help you to understand what happens in the system. Technical user manual...

  • Page 128: Technical Data

    Studer Innotec SA next3 10 TECHNICAL DATA V 1.3 © Studer-Innotec SA next3 Tech manual...
  • Page 129 Studer Innotec SA next3 Technical user manual V1.3 © Studer-Innotec SA...
  • Page 130 Studer Innotec SA next3 V 1.3 © Studer-Innotec SA next3 Tech manual...

  • Page 131: Product Recycling

    12 CONFORMITY The inverter charger next3 described in this manual has been designed and manufactured in accordance with the following European directives : Low Voltage Directive (LVD) 2014/35/EU...
  • Page 132 Studer Innotec SA next3 © copyright Studer-Innotec STUDER Innotec SA Rue des Casernes 57 1950 Sion – Switzerland Tél +41(0) 27 205 60 80 +41(0) 27 205 60 88 info@studer-innotec.com www.studer-innotec.com V 1.3 © Studer-Innotec SA next3 Tech manual...
  • Page 133 STUDER Innotec SA Rue des Casernes 57 1950 Sion – Switzerland Tél +41(0) 27 205 60 80 +41(0) 27 205 60 88 info@studer-innotec.com www.studer-innotec.com...

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