4.3 Electrical Connections
Before marking wire connections, unscrew the four screws on both sides of the wiring box,
then remove the cover.
Figure 4.8 Bottom Side of Inverter
Press on the wiring box cover while loosening the screws. This action will help to
avoid damaging the screw threads.
Screwdriver
4. Installation
4. Installation
.15.
.14.
Before making electrical connections, double check to ensure the steps below are strictly
followed:
a. Switch the Grid Supply Main Switch (AC) OFF.
b. Switch the DC Switch OFF.
Please see figure 4.9,there are four knockouts in the wiring box. The two knockouts on the
left (bottom and side) are for the DC conduit entry. The two knockouts on the right (bottom
and side) are for the AC conduit entry. All knockouts in the wiring box can accept trade size
1 inch (ID) conduit.
Terminal A
Terminal B
Figure 4.9 Connection Area of Inverter
Warning
Before connecting inverter, ensure the PV array open circuit voltage is
within the limit of the inverter. Otherwise the inverter could be damaged.
DO NOT connect the PV array positive or negative to ground.
This can cause serious damage to the inverter.
Strip the end of the wire ¾” minimum to 1” maximum. Use a slotted (flat-blade) screwdriver,
insert the screwdriver in Terminal A (top) and insert the wire into Terminal B (bottom) of the
Rapid Termination wiring block. While holding the wire in place, remove the screwdriver
and the Rapid Termination spring terminal block will fix the wire in place. Use the labels on
the Rapid Termination wiring block to ensure proper polarity.
4.3.2 Connect PV Side of Inverter
4.3.1 Terminal Connections
The inverter cannot accept PV strings wired in parallel.
Before connection, ensure the PV array strings are correct polarity
and match the proper “DC+” and “DC-“ symbols you will connect them to.
Use qualified DC cable for PV system.
