SunPowerCorporationDocument#001‐69178Rev**
12
The PV panel open circuit voltage should be at or below the listed voltages in Figure 8 under all
circumstances. Each DC input to the DC terminal block must be less than the voltages listed in
Figure 8.
To wire the DC inputs from the PV panels to the SunPower Inverter (Refer to Figure 9): Note:
Each DC input connection must carry the same input voltage. The SunPower Inverter 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 8 FOR THE SPR-5200, SPR-4600 SUNPOWER INVERTER
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 SunPower Inverter.
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.
7. Confirm that the DC disconnect is turned off and remove the material from the array.
With a voltmeter, check the PV array positive leads and confirm that the voltage is
positive when referenced to the negative leads. The reading should match your series
Voc total.
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