[RedDevil]

Originally Posted by Hersbird

So may battery was totally dead and it said 12 hrs 45 mins. I had to leave at about 11 hours and it was at 91% I think.

They say the level two charger drops that to just 2.5 hours. Makes me think the factory box is just pretty amp limited. It says 12 amps 1440 watts that's at 120. So if i tried to use the factory box but with a 240 adaptor would it just run the same 12 amps but then 2880 watts? That means an actual 240 charger running the full 27.5 amps is needed to do the 6600 watts.

OK, I know you guys probably get this I'm just working it out in my head.

anyway even at 1440 watts a 16,000 watt battery should fully charge in 11.1 hours but I'm sure it ramps down a couple times as it approaches 100%

I bet the 2.5 hrs at 6.6 is a bit optimistic as well, probably more like 3 to hit 100%.

Also isn't 100% charging bad? I can't seem to set other limits. Maybe what they call 100% isn't actually 100%.

Mind that charging is not 100% efficient. Resistive losses, conversion to DC and pack voltage, charge monitoring and losses at the cell level reduce the actual efficiency to about 85%.

So while you may draw 1440 Watt from the panel only 1224 Watt goes into the pack. Then it would take just over 13 hours to fully charge an empty battery.

Also, the actual capacity of the battery will be bigger than it shows. Just like '100%' isn't entirely full, '0%' isn't completely drained. But while sitting uncharged it may well have dropped below the '0%' level...