Magnum Energy MP Extension Box (MPX Series) - Manual (Page 41)

3.0 Installation
© 2011 Magnum Energy, Inc. 37
Battery Temperature Sensors (see Figures 3-21e)
The Battery Temperature Sensor provides the inverter with precise battery temperature informa-
tion that enables the batteries to be correctly charged under extreme temperature changes. If the
BTS is not installed and batteries are subjected to large temperature changes, battery life may be
shortened.
1. Using the supplied extension cables, route a cable from the each inverter through the MP en-
closure to a BTS.
Info: When the inverters are installed in a series, each inverter should have a BTS con-
nected to its Battery Temp Sensor port.
2. Connect one end of each extension cable to the Battery Temp Sensor port (yellow label) on each
inverter.
3. Connect the other end of each extension cable to the RJ-11 connector on a separate BTS.
Connecting the DC Cables from the MP Enclosure to the Battery Bank
Once all the wiring (AC, DC, and Comm) is completed, connect the DC cables from the MP enclosure
to the battery bank.
Connecting Remote Cables to Remotes (see Figure 3-21e)
1. Using the supplied RJ11 remote cables, route a cable from each inverter to each remote control
(or router).
2. Connect one end of each remote cable to the Remote port (blue label) on each installed inverter.
3. Connect the other end of each remote cable to a separate remote control.
Connecting Inverters Using Series Stacking Cable (see Figure 3-21e)
1. Using the supplied stacking cable, route the cable from the HOT 2/LEG 2 inverter’s Stack port
(red label) through the MPX and MP enclosure to the HOT 1/LEG 1 inverter’s Stack port.
2. Connect the two ends of the series stacking cable to the Stack port of the two installed inverters.
MPXS-60S Communication Wiring
Each MPXS-60S kit includes a remote cable and a stacking cable. The MP enclosure comes with an
extension cable for connecting the inverter to a Battery Temperature Sensor (BTS).
3. Route a DC negative battery cable (black) from the battery bank thru the bottom of the MP enclosure
for each inverter.
4. Connect the end of each DC negative battery cable (black) to the battery negative connection (DC
shunt’s bottom busbar).
5. Route an appropriately sized DC equipment ground wire from the ground terminal in the battery
bank enclosure to the DC ground terminal in the MP enclosure.
6. Route an appropriately sized DC grounding wire (green or bare wire) from the DC GROUND busbar
in the MP enclosure to the system ground (see the MP owner’s manual for information on sizing and
connecting the system ground wire).
7. Ensure the DC wire connections (to the inverter, DC circuit breaker, and DC shunt) are fl ush on the
surface of the DC terminals and the hardware used to hold these connections are stacked correctly
(see Figure 3-17); and then securely tighten these connections.
IMPORTANT: Only after the entire installation is complete and all connections are verifi ed,
should the DC circuit breaker be closed to provide power to the inverters.