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Old 09-28-2017, 04:10 PM   #1
National RV Owners Club
Freightliner Owners Club
Join Date: Jul 2009
Location: Indiana
Posts: 39
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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Fleetwood Owners Club
Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 14,581
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.

Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
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Old 09-28-2017, 07:08 PM   #3
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Location: St. Charles MO
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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.
2005 National Dolphin 6376LX, W-24, 8.1 Vortec, 2100 Allison MH 5 speed, Safe T Plus, Toyo tires, TireSafeGuard TPMS, 2019 Equinox 1.5L, Blue OX Aventa LX tow bar, Roadmaster EZ5 baseplate, SMI Stay-In-Play Duo
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ace, panel, replace, roof, solar, solar panel, solar panels

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