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Old 07-03-2014, 10:20 AM   #1
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30 watt solar charger enough ?

despite my fridge problems, gonna do a week of dry camping for the first time at lake powell. I bot 2 new 122 amp deep cycle batteries, one for the rv and one for a 55 watt cooling fan at nite for the wife, so she can sleep. is a 30 watt solar charger (with regulator) enough to keep them charged ? in the rv, will only use fridge, water pump and a few led lights, and the fan for nite time use only
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Old 07-03-2014, 10:49 AM   #2
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It will not take very much usage to out pace the 30 watt solar panel, you need to connect the batteries parallel to each other so they both see the same amount of load and by all means take a generator with you to help the solar charger. I would let the solar charge during daylight hours making sure you keep it facing the sun then use the generator as a charger to finish the charging in the evening when needed.
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Old 07-03-2014, 11:12 AM   #3
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A 30 watt panel will not keep up with the 55W fan. 55/12 = 4.6A draw. If you run the fan for 5 hrs that is 23 amp hours. If your panels give you 2 amps (very optimistic) it would take over 11.5 (23/2) hours just to recharge the battery for the fan, this does not include all the other current draws. I would think to keep up you would need about 150W solar panel.
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Old 07-03-2014, 11:42 AM   #4
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Quote:
Originally Posted by Batts-toy View Post
It will not take very much usage to out pace the 30 watt solar panel, you need to connect the batteries parallel to each other so they both see the same amount of load and by all means take a generator with you to help the solar charger. I would let the solar charge during daylight hours making sure you keep it facing the sun then use the generator as a charger to finish the charging in the evening when needed.
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