Page 51
光伏并网逆变器 Solar On- -Grid Inverter ST10KTL/ ST12KTL/ ST15 TL/ ST15KTL/ ST17KTL / ST20KTL User Manual User Manual Version Version 2.0 (EN)
Page 52
光伏并网逆变器 All rights to the content of this manual are owned by MOSO Power Supply All rights to the content of this manual are owned by MOSO Power Supply Technology Co., Ltd (hereinafter “MOSO MOSO”). No part of this document can be...
Page 53
Table of Contents USER MANUAL II VERSION 2.0 (EN) 1 ABOUT THIS MANUAL 3 1.1 A ......................3 PPLICABILITY 1.2 T ...................... 3 ARGET ROUP 1.3 S ......................... 3 AFETY 1.3.1 A ................... 3 PPROPRIATE SAGE 1.3.2 Safety Instructions..................4 1.3.3 Safety Symbols ...................
Page 54
8.1 S ....................... 26 AFETY 8.2 O ..............26 VERVIEW OF THE ONNECTION 8.3 C PV A (DC) ..............27 ONNECTION OF THE RRAY 8.3.1 Conditions for DC Connection ..............27 8.3.2 Assembling the DC Connectors ..............29 8.3.3 Connecting the PV Array (DC) ..............29 8.4 C (AC).............
Please read these instructions carefully before use and keep them for future reference. 1.1 Applicability This manual is applicable to the following inverter types. ST10KTL/ST12KTL/ST15KTL/ST17KTL/ST20KTL 1.2 Target Group This manual is intended for: Qualified personnel who are responsible for the installation and commissioning of the inverter;...
A. PV Strings B. ST5-8KTL C. AC Distribution Unit D. Low Voltage Grid Figure 1 Principle of a PV Plant with ST series inverter 1.3.2 Safety Instructions Safety symbols used in this manual, which highlight potential safety risks and important safety information, are listed as follows: CAUTION: Risk of electric shock.
Page 57
Warning! Please do not connect PV array positive or negative to ground, it could cause serious damage to the inverter. PV module used with inverter must have an IEC 61730 Class A rating. Warning! • Ensure that input DC voltage is less than max. DC voltage.
1.3.3 Safety Symbols This section gives a glossary of all the symbols shown on the inverter and the type label. · Symbols on the inverter Symbol Description Danger of high voltage! R esidual voltage will vanish in 5 minutes after the inverter disconnected.
Page 59
Equipment grounding conductor. AC voltage. You can operate the interface by tapping on it. • Tapping once: The background illumination switches • Tapping again: Updating information. You can operate the interface by pressing buttons. For more information on operating the buttons, refer to Section 7.2 ‘LCD display’.
2 Introduction 2.1 Overview The image shown here is for reference only. The actual product you receive may differ. Figure 2 Stereogram 2.2 Electrical Block Diagram · Electrical block diagram...
Figure 3 Electrical block diagram 2.3 Product Instruction Figure 4 Name Description The DC switch can disconnect DC Switch strings inverter safely ST Series Inverters PV Terminals have two independent MPP trackers PV1 and...
PV2. Per tracker has input terminals. Terminals connect the WiFi Terminal WiFi module or GPRS module. Terminals that connect RS485 Terminals RS485. Release press from Degassing internal. AC Terminals AC output The display shows the status information (e.g. working status, LCD Display power, input voltage) as well as errors and...
3 Packaging List · List Table2 Item Name Quantity Solar Inverter Mounting Frame expansion bolt PV connector plug bolt plug bolt RS485 connector User Manual The ST series inverter is shipped with the following items:...
Page 65
用户 手册 逆变器 用户手册 Figure 6 · Identifying the Inverter You can identify the inverter by the nameplate. The nameplate is located on the right-hand side of the housing. The inverter type (type/model), serial number (serial no.) and other device-specific characteristics are specified on the nameplate.
Max short-circuit current per MPPT 4.2 Output(AC) Table4 Inverter Model ST10KTL ST12KTL ST15KTL ST17KTL ST20KTL Rated output power 10 kW 12 kW 15 kW 17 kW 20 kW Rated output voltage 3/N/PE~230V/400V AC voltage range 310~480V(Conform to local standards) Rated AC grid...
Page 68
Table5 Inverter Model ST10KTL ST12KTL ST15KTL ST17KTL ST20KTL Efficiency Max efficiency 98.2% 98.2% 98.2% 98.2% 98.2% Euro efficiency 97.20% 97.30% 97.50% 97.50% 97.50% MPPT efficiency >99.9% >99.9% >99.9% >99.9% >99.9% Protection DC Switch DC reverse polarity protection DC surge protection...
4.4 General Data Table6 Inverter Model ST10KTL ST12KTL ST15KTL ST17KTL ST20KTL Operating temperature -25℃ ~ +60℃ range Relative operating 0% RH ~ 100% RH humidity Operating altitude 0~4,000 m (Derating above 2000 m) Cooling Fans Display LED + LCD Communication RS485/WiFi(opt.)/GPRS(opt.)
5 Function Description The basic functions of the inverter are as follows. 【Conversion function】 The inverter converts DC power from the PV array into grid-compliant AC power and feeds it into the utility grid. 【Data storage】 Inverter logs essential data including running information and error records.
6. Operation Mode Figure 7 NOTICE! The inverter output power decrease is usual in the condition of thermal protection, but if it occurs frequently, you need to check the heat sink or consider putting the inverter in the place where have better air flow, and if output power decreases caused by electrical problem, please ask for professional supports.
7 Installation 7.1 Safety Instructions DANGER! Improper installation may cause fire or explosion. • Do not install the inverter on flammable and explosive construction materials. • Make sure there is no electrical connection before installation. CAUTION! Improper carry may cause injury. •...
Page 73
The mounting and installation method must be appropriate for the inverter’s weight and dimensions. Mount on a solid surface. The environment temperature should not exceed the working temperature of the inverter(-25℃ to +60℃; derating between 45℃ to 60℃ ) ...
Page 74
• Do not expose the inverter to direct sunlight as this can cause excessive heating and thus power reduction. • In living areas, do not mount the unit on plasterboard walls or similar in order to avoid audible vibrations. When in use, the inverter emits noises which may be perceived as a nuisance in a living area.
7.3 Preparation Tools for installation. Figure 10 Installation Tools 7.4 Fixed the Mounting on the Wall Space for heat dissipation should be reserved while installing the inverter. Install the inverter with good ventilation condition. Figure 11...
Align the wall mounting bracket horizontally on the wall with the arrow upwards. Mark the position of the drill holes. Drill the marked holes. Use a drill with a diameter of 8mm and length of 40-45mm. Then install the wall-mounting bracket. Figure 12 7.5 Fix the Inverter on the Wall Mount the inverter to the bracket.
Page 77
Figure 13 Fasten the inverter into the T slot. Figure 14...
7.6 Check Inverter Installation Status • Check the upper straps of Inverter to ensure it fixed on to the bracket. • Check the secure mounting of the PV-Inverter by trying to raise it from the bottom. • The PV-Inverter should remain firmly attached. •...
Figure 15 Table 7 Object Description DC switch PV terminals RS485 WIFI Degassing AC terminals 8.3 Connection of the PV Array (DC) 8.3.1 Conditions for DC Connection The inverter has two PV input terminals, "PV1" and "PV2", each of them connects two strings. Up to four strings can be connected in total.
Page 80
Figure 1 Figure 16 • The inverter is equipped with a DC switc he inverter is equipped with a DC switch. An external DC breaker is recommended while installing. is recommended while installing. The open circuit voltage of the PV strings cannot exceed the The open circuit voltage of the PV strings cannot exceed the maximum input voltage of the inverter.
PV2 terminal, it is called a mixed connection. • One string can be only connected with one pair of PV terminals and can’t be connected with two pair of PV terminals at the same time. • Otherwise, the inverter will not comply with the requirements of the EMC directive (directive on the electromagnetic compatibility of devices), and will forfeit its operating license.
Page 82
accidentally. 2. Strip the insulation layer and protective sleeve of the cable, and leave the bare cooper conductor in 7mm. Figure 18 3. Insert the bare cooper conductor into the pin and make sure no bare cooper conductor is exposed outside. 4.
Page 83
Figure Figure 22 8. Using a wrench to take apart the connection when it is Using a wrench to take apart the connection when it is necessary. Figure Figure 23 DANGER! Danger to life due to high voltages. Danger to life due to high voltages. ...
Page 84
Steps for DC connection. Figure 24 Figure 24 Make sure the polarity of the output voltage of PV array matches Make sure the polarity of the output voltage of PV array matches the “DC+” and “DC-“symbols. symbols. Test with a multimeter to make sure the o Test with a multimeter to make sure the open-circuit voltage of the PV module is less than the maximum input voltage of the the maximum input voltage of the...
Figure 26 igure 26 All DC inputs should be connected with PV connectors or All DC inputs should be connected with PV connectors or sealed with plugs to make sure the protection degree of sealed with plugs to make sure the protection degree of IP65.
Page 86
Table 7 Cable and MCB Specification Model ST10KT ST12KT ST15KT ST17KT ST20KT Cable (Cu) ≥4mm ≥4mm ≥6mm ≥6mm ≥6mm Micro-Brea • Please use multi-core cable. The diameter of the cable (unstripped) should be 14- 25 mm. • Area of cross-section refers to Table 7. •...
DANGER! Danger to life due to fire. • When the inverter and a load are connected to the same MCB, the protection function of the MCB is not effective. If the load is in short circuit, the MCB can’t detect the current from inverter output and the protection will disable.
Page 88
Figure 27 Cable gland Figure 28 Cable through gland Unscrew the screws of AC terminals (see fig 28) Put the five-cored cable through the connecting box. Connect and lock the cables to corresponding terminals. Make sure the cables be connected correctly. ...
Page 89
Figure 30 Figure 31 NOTICE! Risk of fire if two conductors are connected. • If two conductors are connected to one terminal, this may result in a poor electrical contact which could pose a risk of overheating or fire. • Never connect more than one conductor per terminal. ...
8.1.1 LED1-Green Table 8 No DC input Blinking In waiting mode MPPT is working 8.1.2 LED2-Green Table 9 The inverter is not working Blinking In self-testing mode. Feed into grid 8.1.3 LED3-Red Table10 No Error occurs The inverter is in fault status Normally, after starting up, DC/DC LED and DC/AC LED will light which indicates that the Inverter is feeding electricity to the grid.
Page 92
Figure 33 The display on the inverter can be controlled by the buttons or tapping the front of LCD. To save power, the backlight of LCD will turn off automatically in 30 seconds(by default setting). Click any button or one tap will active it again.
Figure 34 Summary diagram 9.2.1 System Page Figure 35 Power: the present power feeding into the grid; Today: Energy exports to the grid in the present day, and updates the data every 10 minutes; Total: Sum of the energy exports to the grid, and updates the data every 10 minutes;...
Warning, and the report can be found in next page. Warning will be eliminated and the display in this page will be blank. 9.2.2 Message Page Figure 36 The system status is shown on the page of MESSAGE. The first line will show the operation mode like waiting mode, self-testing mode, on-grid mode, and fault mode.
DCI Gird over limit GFCI Fault Pv Config Set Wrong Unrecover Phase Sequence Fault HWAD Fault UnrecoverBoost1_ocp UnrecoverBoost2_ocp Relay Short Relay Open Comm Err Fan Fault 10 Setting up Communication 10.1 Communication Terminal Types MOSO ST10/12/815/17/20KTL can RS485 and WiFi communication.
10.2 Communication 10.2.1 RS485 · RS485 Communication (Applied to one inverter or multiple inverters) In general, RS485 can be used for the communication with up to 32 units. The length of cables should be within 1200 meters. Select high-quality network cable; peel the isolation surface, Select 8-wires (orange white, orange, green white, blue, blue white, green, brown white, brown), then follow the same order with the press pliers push into the 8-wire RJ45 crystal head.
Page 97
Orange white Orange Green white Blue Blue white Green Brown white Brown · Connection method between RS485 and Webbox Communication cables are used for connection among the ST inverters. A crossover cable is used to connect the inverter with the Webbox.
Figure 40 9.2.2Build-in WiFi (optional) The WiFi communication function is only applicable if the inverter has a WiFi module. The WiFi module is built-in and installed in the inverter before shipment from the manufacturer.
Figure 41 WiFi interface Figure 41 WiFi interface Please refer to the Please refer to the WiFi configuration instruction. 11 Troubleshooting Troubleshooting If the inverter is unable to work properly, please refer to the following nable to work properly, please refer to the following instructions before contacting your local service.
-Check if the PV string voltage exceeds the input voltage of the inverter. PV Overvoltage -Call the local service office. -Disconnect the PV (+), PV (-) with DC input, then reconnect them. DCI Gird over limit -Check L line and N line to see whether it has connection faults.
Please put the wasted inverters & packing materials to a place which is convenient for relevant department to dispose and recycle. 13 Warranty MOSO offers 5-year warranty starting from the inverters delivering from the manufacturer’s warehouse. Warranty certificate represents a five year warranty service for mentioned products since the date of purchase.
Page 102
(Only applicable for inverters under normal application, installation, use and service conditions.) ST Series Inverters warrants the above listed products to be free from defects and/or failure specified for a period not exceeding five years from the date of sale as shown in the roof of Purchase to the original purchaser.
Need help?
Do you have a question about the ST10KTL and is the answer not in the manual?
Questions and answers