Re: [electricboats] Maximum input voltage for outboard?

That is a decent battery in terms of energy density!

I'm just surprised to see such a high voltage on an LFP battery after sitting for what I'm guessing is many days.  The BMS must not draw very much.

I looked more closely at your pictures, and now see what I suspect is a Star Trek reference in your boat's name.  (We sometimes call our Nissan Leaf the Shuttle Craft.)

According to SOC tables I have, 54V resting voltage is 99% SOC, and 99.5% SOC comes in at 55.2V.  So if you have the option of turning your charger down somewhat, that should alleviate any concern of damaging the Karvin.

Or you could put a small load on the battery for a bit after fully charging to 58.4V.  You only need to bleed off half a percent or so of capacity (~20Wh).  A 75-ohm, 50-watt resistor would do it in just under half an hour (but would likely get pretty hot).

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