woodguru wrote:
I'll save you some heartache that can happen using multiple 12v batteries in series for 24v or 36v...there's nothing wrong with using them in series, but they like to be charged as separate batteries not connected. They will charge together, but what happens is that one battery can/will charge faster than the others, and the BMS will tell the charger the batteries are full even though two of them are not. Then as you are using these mismatched batteries, the one with the lowest charge will shut everything down based on the fact that one battery is depleted early. After many charges they start to charge really fast based on the full battery, and die really quickly based on the one that's depleted most. That crap screwed up an entire fishing season for me on a new boat. Now I use a disconnect switch and use two chargers, and then connect the batteries turning a heavy duty switch to get 24v....works like a charm.
I'll save you some heartache that can happen using... (
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Good point. Why I use a single 36 volt for tm an 12 volt for electronics. And a separate 12 volt for engine, bilge, power poles, lights and acc.
Thanks for your input.