Connecting The Strings - SolarEdge P300 Quick Installation Manual


Three phase inverter

For AC/DC Safety Switch: - Connect the Ground and Neutral wires to the
terminal blocks in the AC side of the switch. Connect the line wires to the
appropriate connectors according to the label located in the switch.

For DC Safety Switch: Use a standard flat-blade screwdriver to connect
the wires to the spring-clamp terminals
NOTE:
Three phase inverters require neutral connection at all times (only WYE type grids with neutral connection are supported).
3
Verify that there are no unconnected wires.

Connecting the Strings

1
Insert the DC conduit into the DC-side knockout that was opened.
2
Connect the DC equipment ground conductor to the equipment grounding terminal block.
NOTE:
Functional Electrical Earthing of DC-side negative or positive is prohibited because the inverter has no transformer. Earthing of module
frames and mounting equipment (equipotential bonding) is required per NEC.
3
Connect the DC wires, and check that they are fully inserted and cannot be pulled out easily. If the AC/DC Safety Switch has a pre-
assembled RGM (in single phase inverters), flip the RGM plate before making the connections, and then return the plate:

Single phase 3-6kW inverter - Connect the DC wires from the PV installation to the DC+ and DC- terminal blocks, according to the labels on
the terminals. Use a standard straight-bladed screwdriver to connect the wires to the spring-clamp terminals. Refer to the figures above.

Single phase 7.6-11.4kW inverter - Connect the DC wires from the PV installation to the DC+ and DC- terminal blocks, according to the
labels on the terminals. Use standard flat-blade screwdriver to connect the wires to the spring-clamp terminals as shown in the figures
above.

Three phase inverter

Safety switch version without terminal blocks on the DC side - Connect the DC wires from the PV
installation to the DC+ and DC- terminals on the switch, according to the labels.

Safety switch version with terminal blocks on the DC side - Connect the DC wires from the PV installation
to the DC+ and DC- terminal blocks.
CAUTION:
Ensure that the Plus (+) wire is connected to the Plus (+) terminal and that the Minus (-) wire is connected to the Minus (-) terminal.
Veillez à ce que le câble Plus (+) soit connecté au terminal Plus (+) et que le câble Minus (-) soit connecté au terminal Minus (-).
4
If more than two strings are required, they can be connected in parallel in an external combiner box before connecting to the switch.
NOTE:
If more than two strings are connected each should be properly fused on both DC+ and DC- according to NEC690.35(B).
5
If the Safety Switch has a pre-assembled RGM, flip the RGM plate upwards to its original position.
6
Close the switch cover.
Press here with a
screwdriver
Insert the conductor
4
- L1 L2 L3