My reasons were simple. We were going for a trip to Colorado and we wanted to stay a sites that did not provide shore power. I hate the NOISE from generators, so my decision was easy. SOLAR it was! A hidden benefit is that the TT uses no shore power while sitting idle next to the house. With that being said, I also designed my system so that I can enhance it in the future by adding additional panels and batteries without having to replace the MorningStar MPPT 60 charge controller or the wiring.