Join Date: Aug 2006
Location: Arlington, VA
Thanked 13 Times in 11 Posts
Rep Power: 12
Re: Inverter for hot water tank
Nothing, so long as you have a large battery bank and a large alternator and are able to provide the 140 amps charging current to maintain the battery SOC.
(Assumes 1500 watt element and an inverter draw of 1500/12 x 1.1)