Xantrex used to be the top dog. Then they moved production from Canada to China.
Unfortunately, after the warranty period, there are no available parts. If it does fail during warranty they simply swap it out.
I would look at Victron and Outback.
I would consider a 24 or 48 volt battery bank for large inverters.
Magnum did stand up to the plate and replaced mine when it had a catastrophic failure.
I did not see a list of gfci's the Xantrex would work with.
If you don't need the charger and are willing to accept a throw away PSW inverter look at the Prowatt line. I think the 1800 watt is $350?
S Davis wrote:
How about this one, it is direct wire and lists gfic's that will work with it.
http://www.xantrex.com/power-products/power-inverters/freedom-xi.aspx