Have You Installed a Residential Fridge and Inverter in TT?

I would step down to the TL RV1012ULHW with just two batteries. Logistics of wiring are easier too and every post I read says 1000 watts is plenty.

http://www.tripplite.com/sku/RV1012ULHW

Box is fine for a couple group 27 and should operate fine on the five hour+ drive.

I always recommend 100 watts roof solar to keep the batteries maintained when off grid. This is mostly for storage and would not be enough to run the fridge alone. Would still provide a good supplement to the vehicle charge while in transit.