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5 Commissioning
Before powering up the PV system it is important to check the installation for any
hazards that may be present. For convenience, a commissioning checklist is
included in this manual and can be found in the Appendix.
5.1 Mechanical Installation check
▪ Make sure that the mounting bracket is secure, and all screws have been
tightened to the specified torque values. (Refer to 3.2 Mechanical
Installation).
▪ Confirm all knockouts are sealed and conduit is securely attached to the
inverter, creating a water-tight seal.
5.2 Conductor Connections check
▪ Make sure all conductors are connected to the right terminals and properly
labeled.
▪ The appropriate cable management is important to avoid physical damage.
No sharp edges from cable ties exist.
▪ Check polarity of DC input conductors. The DC Switch should be in the
“OFF” position. (Refer to 3.3 Electrical Installation).
5.3 Electrical Check
▪ Make sure that the AC circuit breaker is appropriately sized.
▪ Test whether the AC voltage is within the normal operating range.
▪ Confirm the DC open circuit voltage of input strings is less than 1000V.
Note: If APS RSD products are installed and in the OFF position, each
module will measure ~0.6Vdc. Ensure the DC open circuit voltage of input
strings will be less than 1000V when power is supplied to the Rapid
Shutdown transmitter, if applicable.
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