No one has posted on this topic so I will. My wife and I do a lot of boondocking in our '08, 34' fifth wheel trailer. Boondocking is where you go off grid and have no hook-ups. I've put together a 250w solar system, 4 - 12v deep-cycle batteries (175amp hour ea.), a 1200w inverter, and a WindyNation 500w PMA generator that had to be designed so that it could be portable, including the 25' mast. I just do not believe that solar or wind are adequate by themselves. It requires both. Also, I've learned that DC systems require much larger wire size to over come line loss, that the AC PMA allows me to run smaller wire to the battery bank, and that the battery bank must be wired such that the input ( solar and wind) covers the entire bank (ie-+ to first battery and - to the last battery) and the output ( inverter for 120v ,trailer interior, pump for water, etc) comes off the bank in the opposite way. PS - There has been talk of WindyNation working on a solar tracker - any thing new here? I've looked at a few systems - one that uses LED lights and an old activator arm from obsolete sat. dish (the big ones). PPS - Do not buy batteries from Walmart!