Check out Renogy Solar... I'm copying this from my Lazy Daze owner's forum courtesy of Andy B.
"Solar rocks. Generators suck."
Amen!
"Our rig is too old to upgrade"
Perhaps you're thinking that you don't want to invest thousands of dollars (which is what a good solar power system used to cost in the Bad Old Days) in an older rig. But solar power no longer costs a mint. And as Huskerblue points out, with a suitcase-style system you can move the whole kit 'n' kaboodle to another rig at the drop of a hat. In short, I can't see why any rig would be too old for solar power.
If you want an off-the-shelf, no-installation-needed system, you can get a 100 W Renogy suitcase for about $265. Clip onto your batteries, set the panels out in the sun, and you're done. These suitcase systems are a great starter solution for someone with modest needs and a budget to match. You pay more per watt than if you put together a custom system, but for many people the convenience is worth it.
A step up is to get a couple of 100 W panels. For example, begin with Renogy's $170 Solar Bundle Kit, then add a second 100 W panel for another $140. For just over $300 you can have 200 watts of solar power. You can lay the panels out on the ground, which gives you flexibility (park in the shade but put the panels in the sun), at the cost of the minor hassle of putting them out and taking them in when you move. Or mount them on the roof and just let them work for you.
All the setups just mentioned use low-cost "PWM" (pulse width modulation) charging controllers. If you want to milk the maximum power from your panels, you can step up to an MPPT (maximum power point tracking) controller. There are affordable models from Blue Sky, Victron and others.
You get the point. There are plenty of solar options, starting at less than $300. You don't need to permanently install anything on your older rig. Unless you do all your camping at places with electric hookups, it's hard to imagine why you wouldn't go solar.
