[BiggarView]

If you are using your system only part time, it would be very hard to justify LiFePO4 (lithium for the uninitiated) over more conventional battery types because the cost is simply prohibitive. Using them full time with a long time frame in mind, it is far easier to justify them. Money no object... then have at it. How maintenance oriented are you? if you are up on that game, then deep cycle lead acid batteries that you have to monitor would be the lowest cost option and possibly preferable for part time users. As JABURKHOLDER says... your choice is dictated by your needs. (I'd add the depth of your pockets)

We will be going the solar/battery/generator route soon, when we get our future home on wheels. We are leaning toward AGMs as has been suggested... known technology, reliable, flexible placement in the rig, yep more expensive than basic lead acid but more durable especially if treated well. Batteries don't die... they get murdered.

FWIW