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Old 09-28-2017, 04:10 PM   #1
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Replaced Old Roof Solar Panels?

I own a 2000 National RV Tradewind and I was wondering if anyone has tried to replace the two 20W solar panels on the roof AC covers with higher wattage panels? I heard that the 20W panels will maintain a charge but are too small to actually charge the batteries. Will I need to go with a separate panel or two with a charge controller system to be able to charge the batteries? Thanks for your thoughts.
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Old 09-28-2017, 05:32 PM   #2
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Just leave the old alone and in place. Doing anything with them is a waste of time and money. If you want storage battery charging - add one it two 100w panels and a good quality PWM controller such as from Morningstar. If you want solar for dry camping, then it's larger ststem of at least several hundred watts, MPPT controller, etc.

I have 1500 watts on the RV roof. Plus 200 watts portable / storage.
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Old 09-28-2017, 07:08 PM   #3
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The first mod I did on my Dolphin was to install a 100w Monocrystalline panel just to maintain the batteries while stored and it works well. Buy a kit it will come with a controller you don't need a fancy expensive controller for one panel.
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