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100 w panel
I have 6 - 100 watt panels under test with fairly good instrumentation.
Only under perfect conditions will you ever get 100 watts output--
in my experience even under good conditions you can hope for 50 watts or maybe a little more... so you have to know the load you are trying to supply.
Incandescent lighting can draw a lot of power compared to LED lighting.
Suppose you have 4 batteries each being a top of the line AGM 12 v battery rated at say 250 amp hrs. These would be unusually big batteries for the typical Rv. First off you should normally not draw your batteries below 50% capacity or life span shortened significantly. SO best case 125 amp hrs x 4 batteries x 12 v = 6000 watt hrs. under best conditions. Consider your 100 w panel. under BEST conditions maybe 60w x 5 = 300 watts input to your battery. All batteries have some degree of self discharge. So single panel 100w panel is barely going to provide some lights and a refrigerator would be almost hopeless.... Just my 2 cents
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