User Manual Q&AAnswer
Jan 29, 2025 - 09:08 PM
To connect the PV strings to the GOODWE GW20K-ET Solar Inverter Three-Phase, follow these steps:
1. Ensure that the component frames and the bracket system of the PV modules are securely grounded.
2. Connect the DC cables using the delivered PV connectors. It is important to use the provided connectors to avoid equipment damage.
3. Make sure that the DC cables are connected tightly, securely, and correctly. Poor wiring can cause poor contacts or high impedances, which can damage the inverter.
4. Measure the DC cable using a multimeter to avoid reverse polarity connection. The voltage should also be under the maximum DC input voltage specified. Reverse connection and extremely high voltage can cause damage, so it is important to follow these precautions.
5. Before connecting the PV string to the inverter, ensure that the minimum insulation resistance of the PV string to the ground meets the minimum insulation resistance requirements. The formula to calculate the minimum insulation resistance is R=Max. Input Voltage (V)/30mA.
6. The PV modules used with the inverter must have an IEC61730 class A rating.
Please refer to the user manual for more detailed instructions and illustrations on how to connect the PV strings to the GOODWE GW20K-ET Solar Inverter Three-Phase.
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