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2.3.c Connecting DC Wires/PV Panels

WARNING:

Before proceeding with the DC wiring, completely cover the

surface of all PV-arrays with dark material to avoid the production of electrical
current.

WARNING:

Make sure the polarity and the PV panel voltage between the +

and the – cable connectors of the PV panels are correct. Then connect the
panels to the DC terminal block on the power distribution board.

The PV panel open circuit voltage should be at or below the listed voltages in Figure 9
under all circumstances. Each DC input to the DC terminal block must be less than the

voltages listed in Figure 9.

StarInverter

Model

PV Panel Open Circuit

Voltage

DC Input to DC
Terminal Block

PVP1800 360V

360V

PVP2800 450V

450V

Figure 9: PV open circuit voltages.

To wire the DC inputs from the PV panels to the StarInverter (refer Figure 9):

Note: Each DC input connection must carry the same input voltage. The StarInverter

allows up to three connections for both the + and the – pole.

1. Calculate the maximum open circuit (no load) for each series panel connection.

FOR ALL TEMPERATURE CONDITIONS, THE OPEN CIRCUIT VOLTAGE

FOR EACH SERIES CONNECTION MUST TOTAL LESS THAN THE OPEN
CIRCUIT VOLTAGE INDICATED IN FIGURE 9 FOR THE CORRESPONDING
STARINVERTER MODEL. Review your panel’s data sheet for operating

temperature ranges.

2. Keep track of the array positive and negative leads and mark them clearly.

3. Route the PV array leads through the far right opening in the StarInverter.

4. Connect each series positive DC lead to the positive terminals of the power

distribution board.

5. Connect negative DC leads directly to the negative terminal on the power

distribution board.

6. Connect the ground wire(s) to the ground lug.

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