Xantrex also makes the Freedom Xi series in 1,000 and 2,000 watt sizes that come with built-in 30-Amp transfer relays. I don't know much about them but would evaluate them if looking for an inverter in that size range. Apparently the larger one costs about $200 more than the 1,000-watt size.
These must be related to the new 1,200-watt inverter that was recently introduced by Xantrex to the RV industry in Louisville specifically for motorhomes with residential refrigerators. For now that size is not sold retail.
http://www.xantrex.com/documents/Pow...0Datasheet.pdf