Originally Posted by bkitchens
Thanks. I am looking at the XC2000 with a critical eye on where it would fit. There is not a lot of space in the BC. 2000W is as big as I can go with the 2 battery bank.
2KW is 16.7A at 120V. 3KW is 25A. At 100% efficiency, that would come out to 167A and 250A at 12V
into the inverter. Most 100AH lithium BMS setups are going to limit at 100A continuous. Their surge numbers (30 seconds maybe) *should* be higher than that.
If you want to run at 100% load full time, then indeed 2 batteries aren't quite enough for a 3KW unit. As long as you stay at more moderate loads or only "go high" for short periods, the 3KW would be fine.
Indeed the inverters are never 100% efficient. The battery may be at 13.5V rather than 12V
. There *will* be drop in the wires. All of that will make the final math a bit more messy.