Check out www.donrowe.com. They have a 1000w KISAE pure sine wave for $189 this week. I bought one from them a couple of years ago to replace the factory installed msw. It runs our Samsung 19cf French door. It has worked flawlessly with our 2 6 volt batteries. Be sure to keep the run from the batteries to the inverter as short as possible and use the recommended wire size, which will be big stuff. Also, I got an automatic transfer switch as part of the package that automatically changes to the inverter when I unhook from shore power and vice versa. Mighty handy. I found them to be very helpful and knowledgeable when I called them. I think I saw the Xantrex 600 on sale also.