My system is only 50 watt, I would like a bigger system but bought my Hawk used and it was in place already. Right now we use the fridge on propane when off the grid and the solar keeps up with all my electrical needs, lights, fantastic fan plus another 12v fan, fridge coil fan. If that fridge ever takes a dump I will be going to a compressor fridge and will upgrade the solar at that time. I see high 14 volts and up to 15.1 on bright sunny days at the battery and always worried about over charging until I read what Bob was saying. Battery is a Optima AGM 4 plus yrs old, so I apparently the high input volts isn't hurting anything.