5. Connect the AC wires according to the labels on the terminal block.
Figure 13: AC connection
6. Tighten the screws of each AC terminal with a torque of 1.2-1.5 N*m / 0.88-1.1 lb*ft.
7. Check that the wires are fully inserted and cannot be pulled out easily.
8. Tighten the AC cable gland with a torque of 2.8-3.3 N*m / 2.0-2.4 lb*ft.
9. Verify that there are no unconnected wires to the inverter and that the unused
terminal screws are tightened.
Connecting the Strings to the Inverter
Connect the string to the DC input pairs. If required, connect additional strings in
parallel using an external combiner box/branch cables before connecting to the
inverter.
NOTE
Functional electrical earthing of DC-side negative or positive poles is prohibited
because the inverter has no transformer. Grounding (earth ground) of module
frames and mounting equipment of the PV array modules is acceptable.
NOTE
SolarEdge’s fixed input voltage architecture enables the parallel strings to be of
different lengths. Therefore, they do not need to have the same number of
power optimizers, as long as the length of each string is within the permitted
range.
Connect the DC connectors of each string to the DC+ and DC- connectors.
Single Phase Inverter with HD-Wave Technology Installation MAN-01-00540-1.0
28
Connecting the Strings to the Inverter
