The rule of thumb is one watt of Solar
for every AH of battery
capacity. After months of study I found the number to be 1.5 Watts of solar
(or more) for every AH in cloudy areas.
My goal was to recover a full charge on a bright overcast day. I know get 1-2 Amp of charge-- not much, but something, on dark heavy rain days. In this case it doesn't matter where your panels are pointing.
My point being that while there is a rule of thumb, someone full
Timing in a camper will always appreciate extra charging capabilities. Extra panels don't hurt.
Finally while I have a mix of flexible panels and rigid. The rigid are slightly more efficient charging, and provide shade for my camper, at the expense of increases wind drag while moving.
One 100 watt panel should provide for your Engel fried/ freezer and another for the house loads with the surplus helping with the fridge
. 200 Watts of panels and 200 AH @ 12V for the batteries. Add an extra solar panel
in a cloudy area. Leave room to expand as power is addictive and will prolong your battery
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