When heading into town about a week ago, there was a man waiting in front of the grocery store. He said he had been waiting for me for about an hour. Never met him before, and first thought was was I still in shape to fight ! Well, turns out he is a very nice guy with no knowledge of solar at all. He is running 4 panels, and 8 - L16 batteries He can only tell me what kind of inverter he has by the color and size. He does not have enough power, so he asked me to come over and help him hook up his newest 4 panels and 8 more l-16 batteries. Does he know what size system he has ? No, He doesn't even know what voltage he is running. But the local solar store sold him 4 new panels, not even knowing if they will work for him. If he has a 12 volt system as I do, and most around here, and they sold him 24 volt panels, then he will either need to exchange them or up to an outback mx series charge controller for those 4 panels. And why on earth would they sell him 8 more l-16 batteries, when he told them his on line right now are only 1 year old ? These are just some of the reasons, I hate to see people just go into a store, listen the the used car salesmen and buy what they tell him to buy. Since he and his wife use a refer and only watch tv a couple of hours a day at most, their computer is a laptop, and only a light or two now and then, do you see the problems ? Without even looking , I can pretty much figure out that he doesn't have enough solar coming in to charge the batteries he has. My 2500 watt system would be hard pressed to keep them full. Right now, we are in the monsoon season, which means more clouds then sun. Stay away from the solar stores until you really know what your looking for. And even then, most everything needed can be found on line cheaper by far.