Bev's Dad

I haven’t noticed any issues with a Canadian exit point although I guess that’d be on the wrong side of the Atlantic for ya.

You can absolutely accurately calculate the percentage of a lithium battery. I do so every day with solar setup I live on. Even after months floating between 20% and 80% the batteries stop charging at 99.5% and would shut off if I hit 0-1%

You just need to use a well calibrated shunt.