Magnum Energy MS-AEJ Series User Manual

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2.3.4 Wiring the Battery Bank

WARNING: Lethal currents will be present if the positive and negative cables attached to

the battery bank touch each other. During the installation and wiring process, ensure the

cable ends are insulated or covered to prevent touching/shorting the cables.
Info: DO NOT connect the DC wires from the battery bank to the inverter until 1) all DC

and AC wiring is complete, 2) the correct DC and AC overcurrent protection has been in-

stalled and 3) the correct DC voltage and polarity have been verifi ed.
Info: For the MS-AE Series inverter/charger to perform optimally, a minimum battery

bank of 200 AH is recommended for moderate loads (<1000W) and greater than 400 AH

for heavy loads (≥1000W).

Depending upon the type of batteries you use in the installation (6 or 12 VDC), the batteries

must be wired in series, parallel or series-parallel to provide the correct voltage (see Appendix B

- Battery Information, for guidance on wiring batteries together). The interconnecting DC wires

must be sized and rated exactly the same as those that are used between the battery bank and

the inverter.
Place the batteries as close as practical to the inverter, preferably in an insulated and ventilated

enclosure. Allow adequate space above the batteries to access the terminals and vent caps (as

applicable). Also allow at least 1” of space between the batteries to provide good air fl ow. DO

NOT mount the batteries directly under the inverter.

Info: To ensure the best performance from your inverter system, batteries should be of the

same size, type, rating and age. Do not use old or untested batteries.
CAUTION: Install batteries in a well ventilated area. Batteries can produce explosive gas-

ses. For compartment or enclosure installations, always vent batteries to the outside.

2.3.5 Battery Temperature Sensor Installation and Wiring
The Battery Temperature Sensor (shown in fi gure 2-11) provides the inverter with precise battery

temperature information to automatically adjusts the battery charger’s BULK, ABSORB and FLOAT

voltage setpoints This allows the batteries to be correctly charged under extreme temperature

changes. If the temperature sensor is NOT installed and if the batteries are subjected to large

temperature changes, the battery life may be shortened.
To install the BTS:
Attach the ring terminal end of the Battery Temperature Sensor to the negative battery terminal;

see fi gure 2-9 for proper connection to the battery terminal.
Route the sensor’s cable to the inverter following existing wire runs.
Connect the RJ11 connector end of the BTS cable to the BTS port (yellow label) on the inverter.

Figure 2-11, Battery Temperature Sensor

Installation