Re: Battery bms shutoff
So the b- on the shunt is connected to the negative of one battery only and the negatives of the other batteries are connected to the p- of the shunt, effectively bypassing the shunt for those 5 batteries?
That’s the only way configuring with 18Ah will work. That is definitely the wrong way to configure it. Since the shunt is a low value resistor, the battery it is connected to will see less load than the other 5 batteries because it now has a higher cable resistance due to the added shunt. The current drawn will not be shared equally between batteries.
Are you able to rewire it as per the diagram above?
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