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7 Commissioning
Commissioning is a critical part for a well-installed PV system, which can protect
against fires, injury and electrical shock.
7.1 Inspection before Commissioning
Before starting the inverter, you should check the following items.
1. Inverter unit is accessible for operation, maintenance and service.
2. Re-check that the inverter is firmly installed onto the wall.
3. Space for ventilation well is provided for one inverter or more than one
inverter.
4. Nothing is left on the top of the inverter unit.
5. Inverter and accessories are correctly connected.
6. Cables are routed in safe place or protected against mechanical damage.
7. Specification of AC circuit breaker is reasonable.
8. Terminals not used underneath the inverter are sealed.
9. Warning signs & labels are suitably affixed and durable.
7.2 Commissioning Procedure
If all checking items mentioned above meet the requirements, precede the
following procedures to start up the inverter for the first time.
Step 1 Close external AC circuit breaker.
Step 2 Rotate DC switch to “ON
position.
Step 3 Suppose there are sufficient sunlight and
enough DC power. PV arrays initialize and
supply DC power to inverter. The LCD display is
activated to check the validity first. If there is a
defect on the display, contact Sungrow.
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