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diy solar

diy solar

Lifepo4 prismatic cells as starter battery

TimE

Solar Enthusiast
Joined
Mar 19, 2022
Messages
247
So, thinking aloud here. If I take my spare 210Ah 12v diy battery and wire the perkins 10hp twin cylinder genset to the positive and negative terminals rather than via the jk bms, what will be the downside? The BMS cannot cut off the battery for sure but the balancer can still balance the cells. The starter motor is a tiny 900w job at 12v. Theoretically 80A. I could wire the starter through the 200A JK BMS but it may trip on high inrush current from the starter motor. The cells are Eve grade A 105Ah from 18650 battery store. Any thoughts?
The battery is surplus to requirements so trying to think of a use. It's only done 50 cycles so as new condition
 
I would recommend running the genset through the BMS for the safety of the battery and your own safety. The BMS is often last line of defense between a safe shutoff and a fire.
Please try starting the generator several times through the BMS. The BMS usually has a surge rating to accommodate loads like a motor. Alternatively, you can have the BMS switched output control a contactor which can have a much higher current rating than the BMS.
 

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