Sorry, NOT the best ...
This unit will NOT operate under generator power. So, if you have any kind of power outage/failures, this is NOT the unit for you. EVEN if you put it on the back side of an APC UPS-XS model, which the documentation says is no problem .... it will NOT power on. THe APC UPS is supposed to clean the power OUT of the box, then the AC10 should work ... but this china junk just don't do the trick. If generator power is NEVER an option for you, then no problem ...it's OK, but even in a brown out, or weak power, the AC10 shuts off even on the 2000W APC UPS-XS ... so it's kinda POS from that standpoint ... otherwise, it's fine.