Here is a question submitted to OutsideSupply.com regarding RV Solar Battery Maintainer.
Q: We always leave our RV parked from May through August. The lot we park at does not have power. Every time I go to the RV at the start of the season the battery is dead, what can I use that is reliable and durable?
A: This is a very common problem with RV, Travel Trailers, Class A, Class B, and Class C campers. The battery in the vehicle often drain without some charging. It often take several months to drain on its own but this problem can be eliminated with a small RV Solar Trickle Charger. We offer a few different models of solar chargers that are perfect for this application.
Note these are not really strong enough for going Boondocking very much, you may want to look into a full rv solar kits for that purpose.
Here are a few panels I can recommend:
Go Power 10 Watt Solar Kit No Regulator Required
Go Power 20 Watt Solar Kit With 4.5 AMP Regulator
10 Watt Unbreakable Solar Module Panel 12 Volt
5 Watt Unbreakable Duralite Solar Panel
Unbreakable 20 Watt Solar Panel
On standard size batteries in vehicles it is a rule of thumb that solar charge controllers are only needed over 10 watts of charging power.
15 Watt Solar Charging Kit
Solar Car Battery Maintainer 1.8 Watt
5 Watt Solar Battery Trickle Charger
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