"no a hairdryer will never ever be possible, as that's 2kw right there" You don't mention the model of Xantrex inverter but the 813-3000-UL is a 3 KW model. I

"no a hairdryer will never ever be possible, as that's 2kw right there" You don't mention the model of Xantrex inverter but the 813-3000-UL is a 3 KW model. I'm old enough that when I was young inverters and switching DC-DC and power supplies in general cost about a buck a watt, now its ten cents and dropping. That would have been $4000+ decades ago, now its about $300 delivered. That's not the only cost, of course, 3 KW at 12 V is a non-trivial DC current, and two hundred aH isn't going to run that hair dryer for hours, but how much hair do you have to dry anyway?