Hi Jim,

Good points.. I guess topping off is a relative term between a production EV and what I'm doing. Does "90%" mean the same thing car to car? I don't know the answer to that. What I meant by it was that I would keep it ready to go with a full charge since it won't be a daily driver - but I was basing that on what my e-bike says to do (also lithium-ion batteries). You're supposed to keep it charged at full unless you plan on long term non-use. But, I also don't know where the charge cut-off is set for that. I have a high voltage cut off value of 4.2V per cell for my EV packs that I was thinking was the safe max charge point for the batteries - and EV West had my charger programmed for that value (382V total). What you mentioned makes me think I should verify that assumption though. I don't have a % charge readout yet so I'll need to go by cell voltage. I can also adjust that cut off value in the BMS so that it would trigger a fault that cuts off the charger before it hits 4.2V per cell.

I'll look into that more. Thanks for the post!