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1.
Plan where to put the BMS4S, the relay, the buzzer/alarm, the led for low SoC warning and
the push-button for simple adjustment of charge level and to wake up the Bluetooth
interface.
2.
Start with connecting the relay on the cable between the man panel and the LFP cells.
3.
Connect the relay to Load OFF and Load ON on the BMS4S, and to - (minus, ground).
4.
Connect the buzzer/alarm to 12V. Connect the other terminal Beep on the BMS4S.
5.
Connect the 12 V led to BMS4S.
6.
Connect the push-button between terminal Inpot and – (minus, ground)
7.
Move the (often yellow) voltage sense cable from the generator to the Gvolt terminal on
BMS4S.
8.
Prepare five cables between the LFP cells and the BMS4S, and press on connectors on the
battery side. Mark the cables on the battery side with labels: B12, B9, B6, B3, B0.
9.
Connect the cables on the BMS4S side first. Make sure the B12V cable is connected into the
B12 terminal etc.
10.
Connect the cables to the LFP cells. Make sure you place the cables on the right cell. Start
with B0.
11.
Now it is just to connect power to BMS4S via the ter12V and – (minus/ground)
12.
Now move the cables on the current distributor so they all are sitting on the same terminal
(unless you intend to keep a separate starter-battery).
13.
Test the installation as described in chapter Testing below.
14.
Start the engine and run it for a while. Test with a wet finger that the alternator does not
exceed 100 degrees. If it does it does probably not contain any protection against
overheating. See bullet 6 in chapter “Equipment connection description” on how to mitigate
that.
15.
To maximize the capacity and life-length of your LFP cells you shall always charge them fully
when they have been unused for a while. Do that now with the 3.6 V LFP charger, one cell at
the time. (But do not leave them fully charged if they will be unused for a while. Discharge
them then to below 80% SoC to maximize life-length.)
16.
Now you are ready to go. Enjoy a life with less worries about lack of electricity.
Equipment connection description