Installation Manual

Page 17

Installation

2.2.6 Wiring the Inverter to the Battery Bank

CAUTION: The inverter is NOT reverse polarity protected, if this happens the inverter

will be damaged and will not be covered under warranty. Before connecting the DC

wires from the batteries to the inverter, verify the correct battery voltage and polarity

using a voltmeter. If the positive terminal of the battery is connected to the negative

terminal of the inverter and vice versa, severe damage will result. If necessary, color

code the cables (with colored tape): RED for positive (+) and WHITE for negative (–)

to avoid polarity confusion.

Info: The DC overcurrent device (i.e., circuit breaker) must be placed in the positive

(red) DC cable line between the inverter’s positive DC terminal and the battery’s positive

terminal (red); as close to the battery as possible.

DC Ground Wire

Route an appropriately sized DC grounding wire (green or bare wire) from the inverter’s DC

equipment ground terminal (Figure 1-2, Item 7) to a dedicated system ground. Recommended

tightening torque is 45 in lbf (5.1 Nm). Refer to Section 2.4 for grounding information and sizing

the DC ground wires.

DC Negative Wire

Route an appropriately sized DC negative wire (white) from the negative terminal of the battery

bank to the inverter’s negative terminal (Figure 1-2, Item 11).

Info: If installing a battery monitor such as the ME-BMK, install a DC shunt in-line with

the negative battery cable.

DC Positive Wire

Mount the circuit breaker assembly as near as practical to the batteries, and then open the circuit

breaker.

WARNING: DO NOT close the DC circuit breaker to connect battery power to the

inverter at this time. This will occur in the Functional Test after the installation is

complete.

CAUTION: If connecting live battery cables to the inverter’s DC terminals, a brief spark

or arc may occur; this is normal and due to the inverter’s internal capacitors being

charged.

Route and connect an appropriately sized DC positive wire (red) from the inverter’s positive DC

terminal (Figure 1-2, Item 10) to one end of circuit breaker (or DC fuse block).

Connect a short wire (same rating as the DC wires) to the other side of the DC circuit breaker

and the other end of the short wire to the positive terminal of the battery bank (see Figure 2-1

for reference).

Ensure the DC wire connections (on the batteries, inverter, and DC circuit breaker) are ﬂ ush

on the surface of the DC terminals, and the hardware (lock washer and nut) used to hold these

connections are stacked correctly (see Figures 2-5 and 2-6). Verify all DC connections are torqued

from 10 to 12 ft lbf (13.6 to 16.3 Nm).

Once the DC connections are completely wired and tested, coat the terminals with an approved

anti-oxidizing spray.

Attach the red and black terminal covers over the inverter’s DC connectors, and then secure them

in place with the supplied screws (see Figure 1-2).

If the batteries are in an enclosure, perform a ﬁ nal check of the connections to the battery terminals,

then close and secure the battery enclosure.