SMA PVO-N-20 - Manual (Page 41)

SMA Solar Technology AG 8 Commissioning
Installation Manual PVO-BOX-IA-en-10 41
8 Commissioning
Requirements:
☐ SMA PV Offset Box is fixed firmly to the wall.
☐ Operating mode and output voltage are set correctly.
☐ AC cable is correctly connected.
☐ DC cables are correctly connected.
☐ Unnecessary AC terminals are closed with the corresponding sealing plugs.
☐ Unused DC inputs are closed with the corresponding DC connectors and sealing plugs
Commissioning for the operating modes "Continuous operation" or "Temporary
operation"
For the operating modes "Continuous operation" and "Temporary operation" of the
SMA PV Offset Box, the inverter must not yet be fully commissioned. The PV cables must be
connected to the inverter and the DC switch-disconnector closed so that the SMA PV Offset Box
can apply voltage to the PV modules. However, during continuous operation, the inverter must
not be connected to the electricity grid. The miniature circuit-breaker must be switched off.
After completion of continuous operation or after the first 10 days of temporary operation, the
inverter must be re-commissioned.
Operation of the SMA PV Offset Box with SMA multi-string inverters
In SMA multi-string inverters, the strings in the inverter are disconnected by the pulling the
Electronic Solar Switch (ESS) out.
If the SMA PV Offset Box is commissioned while the inverter remains disconnected (e.g. during
continuous operation), the SMA PV Offset Box will only apply voltage to one string.
• Prior to commissioning the SMA PV Offset Box with a disconnected SMA multi-string
inverter, re-plug the ESS on the inverter.