Well, I will have to do a little more testing and documenting things like "under load" or not. I don't remember right now if the 11v episode was under load or not. I do know she was pushing out major watts like 80-90 and some serious amps like 24-30 when the sun started hitting the panels. The best thing is comparing it to the past when I would arrive at the desert on Saturday and by Wednesday things were starting to get dim without even running a furnace! I would have to start the tow rig and plug in to charge the batteries. This time we ran the furnace every night and the solar did all the work and we just stayed toasty warm.