1.5 Shunt (BCS)
The Shunt is an optional component and it is required for the AIMS MPPT+ to achieve the optimal
operation levels. It also functions as a hub for connecting measurement sensors. The main purpose of
the shunt is to allow the AIMS MPPT+ to measure current drawing into and out of the battery bank.
DC load centers are where the AIMS MPPT+ Shunt is recommended to be placed. Installing it in an
electrical enclosure is also acceptable. Locating the Shunt is essential for safety. Please note that the
capacity of the Shunt is 50mV, 500Amp.
See page 2-3 for wiring connection terminal.
1.6 Battery Temperature Sensor (BTS-3)
The battery temperature sensor BTS-3 is used to compensate charging by adjusting charging voltage up
or down according to the temperature detected by the sensor.
See page 2-3 for wiring connection terminal.
The AIMS MPPT+ requires BTS-3 to be connected for all charging features to be available. AIMS
MPPT+ is able to operate without the sensor, but Absorption Trigger set points will be lower and
equalization stage will be disabled. BTS-3 can be mounted on the battery posts.
1.7 Battery Voltage Sensing (BVS)
Connect the red wire to a battery positive bus and the black wire to a battery negative bus within the
DC load center. See page 2-3 for wiring connection terminal. Two sense wires may be connected to
compensate possible battery cable loss during charging. Be sure to observe correct polarity when
installing voltage sense wires or damage will result.
1.8 Wiring Diagram
Before starting to initiate the AIMS MPPT+, keep all breakers in the OFF position. When you are ready
to start the AIMS MPPT+, turn on ONLY the Battery breaker. Do NOT turn on the PV breaker until the
instruction on LCD shows during AIMS MPPT+ initialization. The internal electric circuit of the AIMS
MPPT+ can only be powered by the batteries.
The installation environment of AIMS MPPT+ should be in an area of good ventilation. Never locate
the AIMS MPPT+ in a poorly ventilated battery area because batteries emit explosive gases. Do not
locate the AIMS MPPT+ within 1 meter of the batteries to ensure a safe distance.
See next page for the wiring diagram of SCC40MPPT as an example.
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