The 1970 Airstream Overlander International is a 27' dual axle shiny aluminum tiny home on wheels. I have installed a solar system that was designed with the help of the great guys at AM Solar in Springfield Oregon (www.amsolar.com) and am currently running three 100 watt Renogy panels on the roof and one 100 watt Renogy panel on a 50' tether in case I want to park in the shade. For the batteries I went with a 300ah lithium bank. The batteries weigh just about 70 pounds and take up the same footprint as the 200ah AGM battery that was in the trailer when I got it. They system was very easy to install and I enlisted the help of Capital Communications in Helena Montana to achieve a perfect installation. So far the system is operating flawlessly and generates more energy than I can use. The other modification that I made was to remove the black tank and toilet and install a Natures Head composting toilet. The unit uses peat moss and has a 12v fan incorporated into the design that keeps a negative pressure in the composting chamber. I am very happy with the results, there is no odor and the toilet is a breeze to maintain. the images below were taken with an older iphone so the quality isn't great but you can get an idea of how things were done.