Portable Solar Panel advice

Discussion in 'Power - Site Power/Batteries/Generators/Solar' started by Nephidoc, Apr 4, 2011.

  1. Nephidoc

    Nephidoc New Member

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    I'm headed off for the first trip in our new Baja.

    I wanted to augment our battery power with a solar panel.
    I'm using this as a learning opportunity. I know a smaller panel won't completely charge
    my battery. I don't want to fasten a panel to my new PUP. I also want a panel I can charge
    my ham radio battery with for field day.

    I have been thinking about the following prospects.
    Any advice, comments, detractions or plain heckling are invited.

    http://cgi.ebay.com/80W-Folding-Polycrystalline-SOLAR-PANEL-Portable-18V-/170621380327?pt=LH_DefaultDomain_0&hash=item27b9d3a6e7

    http://cgi.ebay.com/120W-Folding-Portable-solar-panel-w-s12V10A-controller-/270727273113?pt=LH_DefaultDomain_0&hash=item3f089a5a99

    http://www.amazon.com/Sunforce-50048-60-Watt-Solar-Charging/dp/B000CIADLG/ref=sr_1_44?ie=UTF8&qid=1301953567&sr=8-44

    Thanks for any help.

    Stan
     
  2. rabird

    rabird Howdy!

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    That 80 watt panel ought to make 20 ah or more a sunny day.
    I estimate my max battery usage @ 10 ah/day or ~ three hours of furnace use.
    My single LED light only uses 1 ah in 7 hours so I don't count it [;)]

    Have fun with your education. I've never understood the angle the folding panels are set to.

    I've used this Solar radiation map.
     
  3. windstar

    windstar New Member

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    .................. I've never understood the angle the folding panels are set to.

    I have learned from good sources that the angle of the panels should be equivalent to your latitude and and pointed to your true south.
    In my case:
    - true south is; 79W
    - latitude is: 43.4N
    don't use my numbers because i'm in canada, try to find yours and use mune as a reference.
    This way will give the best possible position to get the better of sun hours.
     
  4. bobhcs

    bobhcs Colorado Springs

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    I have an 85w panel which will keep the battery fully charged with about 4 hours of sunlight a day. I have all LED lights but use the furnace quite a bit. I made a spreadsheet to estimate my usage when I was choosing a panel and designed in quite a bit of margin for rainy days.
     
  5. ezduzit

    ezduzit New Member

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    If I had the bucks, I would buy flexible solar panels. Generally, Solar cells are very fragile.
    http://www.siliconsolar.com/flexible-solar-panels.html
     

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