I'm trying to get to grips with LFP batteries and thought I could dip my toe in the water by installing a small pack to power my trolling motor.
I'm going to use the motor on a small tender, and would be quite happy with a full throttle duration of 20-30min- it''s just for getting to and from a mooring. The motor draws 64A at full power, so I reckon any battery over 20Ah will be big enough for me. I'll be taking it ashore, or aboard the yacht, to charge. Small and light is good- as is cheap, obviously!
There are plenty of 'drop in' type batteries on eBay at low prices, but it is the BMS which lets them down, with maximum discharge currents of 1C. So I would need a 64Ah battery, which is overkill.
Daft newbie question no 1: what if I took power directly from the cells, bypassing the inbuilt BMS? Could I still charge via the BMS, or would that not work? (Yes I know in this scenario there is no automatic low voltage cut off).
Question 2: I could buy a bare pack of balanced cells, no BMS, and draw power directly as above. Does the lack of BMS make charging it more difficult?
Thanks in advance
I'm going to use the motor on a small tender, and would be quite happy with a full throttle duration of 20-30min- it''s just for getting to and from a mooring. The motor draws 64A at full power, so I reckon any battery over 20Ah will be big enough for me. I'll be taking it ashore, or aboard the yacht, to charge. Small and light is good- as is cheap, obviously!
There are plenty of 'drop in' type batteries on eBay at low prices, but it is the BMS which lets them down, with maximum discharge currents of 1C. So I would need a 64Ah battery, which is overkill.
Daft newbie question no 1: what if I took power directly from the cells, bypassing the inbuilt BMS? Could I still charge via the BMS, or would that not work? (Yes I know in this scenario there is no automatic low voltage cut off).
Question 2: I could buy a bare pack of balanced cells, no BMS, and draw power directly as above. Does the lack of BMS make charging it more difficult?
Thanks in advance