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Sound about right to me.
I think they say most of the USA has about 5 good hours (on avg) for solar production but a 100 watt panel might only give you 90 watt per an hour, then if its cloudy or some shading, not tilted, dirty panels etc..... 3 hours sound realistic on what to expect on a mostly sunny day.
Maybe less than 3 in the winter - esp if not tilted.
Thats why I would go with 200 to 300 watts for just two batteries (200 amp hour total .... 50% = 100 amh useable) to max maximize charging and offset cloudy days, winter sun.... etc.
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2017 Axis / 25.4: Big Foot Levelers, Aims 1200 Watt inverter, Ceramic Window Tint, Full River AGM 6V batteries, Front Hellwig Sway bar / Rear Track Arm, Safe T Plus Steering Stabilizer, PD 4655 converter, Hard Wired Surge Guard, WEboost + WiFi Ranger, LED Headlights/Driving lights, TPMS, Surge tank, Tornado flush, Viair Compressor
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