The trailer culture is still solidly lead-acid, for which most airstreams will support the weight. Lithiums are definitely better in theory, but they aren't th

The trailer culture is still solidly lead-acid, for which most airstreams will support the weight. Lithiums are definitely better in theory, but they aren't that much better volumetrically, and they're considerably less forgiving- you'll either pay through the nose for the intelligent battery management circuitry or end up with a ticking time bomb. I'd plan on sticking with lead acid to start. It's forgiving, good in the cold, and heat. With a 99+% recycling rate, it's not like you'll be killing the environment by doing so. Stick with AGM or gel lead-acids to eliminate the risk of acid spillover and failure from lack of maintenance. Since airstreams are shiny and curved, flat rigid solar panels are probably not going to be what you want. There are a number of thin film panels, and although most of them are less area-efficient than commodity silicon PV panels, you can compact them more easily and then deploy once parked. Thin films can easily win on weight-efficiency too. PV's are unfortunately, regardless of efficiency, not going to absorb enough sunlight to do much more than charge your laptop and maybe keep your batteries topped off and run a fan or minifridge. That is, unless, you have a ridiculously large number of PV modules taking up half your interior space, or you only camp in spots that are nice all year. Living requires heating/cooling, food, water, toilet, and bath/shower. Those are usually the hardest things to get right. Active climate control requires wall or truck power, or a genset (yuck!). Lastly, budget a lot for an airstream, and budget a lot of time and money for the renovations you want to do. People in the know may tut-tut the upgrades you want to do because they are purists when it comes to airstreams.