© 2015 Sensata Technologies
Installation
17
CAUTION:
Install batteries in a well-ventilated area.
Batteries can produce explosive gasses. For compartment or
enclosure installations, always vent batteries to the outside.
2.3.6 Inverter to Battery Bank Wiring
WARNING
: Ensure all sources of DC power (i.e., batteries)
and AC power (utility/shorepower or AC generator) are de-
energized (i.e., breakers opened, fuses removed) before
proceeding.
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 or heat
shrink tubing—RED for positive (+) and BLACK for negative
(–) to avoid polarity confusion.
Info:
The DC overcurrent device (i.e., fuse/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 Ground Terminal (Figure 1-3, Item 8)
to a dedicated system ground. Torque to 45 in-lbs.
2.3.6.1 Wiring the Battery Bank to a MMSA1012 Inverter
Use the following information to safely connect the MMSA1012
inverter to your battery bank. Refer to Figure 2-1 before proceeding.
Inverter’s DC Positive and Negative Wires
The MMSA1012 inverter comes with the positive and negative DC
battery cables secured to the unit (and the red/black terminal covers
in place). The DC cables have an attached Anderson connector.
Important: You must supply a compatible Anderson connector (see
Figure 1-7) for the battery bank DC cable side (per Figure 2-1).
Battery Bank’s DC Positive Wire
1. Mount the DC fuse block (or circuit breaker assembly) and DC
disconnect as near as practical to the batteries, and then remove
the fuse (or open the circuit breaker).
WARNING
: DO NOT close the DC fuse/disconnect (or
close the DC circuit breaker) to enable battery power to the
inverter at this time. Wait for the
Functional Test
.
