Should have made this comparison earlier. Most modern cell phone chargers are 10 watts. The "fast chargers" are 15 watts. Most folks consider 100 watt dolar charger as a "minimum starting point" to maintain a 12 v battery. If you plan on drawing down the battery by using lights, water pump, fridge (on gas) , etc. then 200 watts is a starting point.
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Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
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