Solar Panel Controller Schematic

i need schematics or circuit diagrams for solar charge controllers?

i have a solar panel that can give up to 20v dc supply…..i need to make a charging circuit that can charge a 12v gel cell battery….anyone know any site with useful circuit design??

I did two Google searches.
The first for [solar charge controller circuit diagram]

http://www.google.com/search?hl=en&q=solar+charge+controller+circuit+diagram&rlz=1R2GGLL_en&aq=2&oq=solar+charge+controller&aqi=g10

Did not see much there till I got to the bottom of the page.
Several links equaling other searches.
[solar battery charger circuit diagram]

http://www.google.com/search?hl=en&safe=off&rlz=1R2GGLL_en&newwindow=1&q=solar+battery+charger+circuit+diagram&revid=1321056361&ei=sSYtSo75IKXoswOQrqmCCw&sa=X&oi=revisions_inline&resnum=0&ct=broad-revision&cd=1

[solar wiring diagram]

http://www.google.com/search?hl=en&safe=off&rlz=1R2GGLL_en&newwindow=1&q=solar+wiring+diagram&revid=1690969710&ei=RigtStSUMp-ctgPxhZzmCg&sa=X&oi=revisions_inline&resnum=0&ct=broad-revision&cd=3

[solar battery charger circuit diagram]

http://www.google.com/search?hl=en&q=solar+charge+controller+circuit+diagram&rlz=1R2GGLL_en&aq=2&oq=solar+charge+controller&aqi=g10

This the most promising thing so far.
Voltage Doubler for Solar Battery Charger –
SolarFind out how to make a current controlled
solar battery charger using an LM317T …
Find out how to construct an AC voltage doubler circuit. …
Part way down the page is this link;
Solar Charge Controller
Find out more about Solar Charge Controllers
Article Last Modified: 15:43, 29th Jul 2008
solar | electronics | electric circuit

http://www.reuk.co.uk/Solar-Charge-Controller.htm

To another link:
Solar Charge Controller
Find out more about Solar Charge Controllers
solar | electronics | electric circuit

http://www.reuk.co.uk/electric-circuit.htm

Ok I quit, lots to look at though.
Next search [solar charge controller schematic]

http://www.google.com/search?hl=en&q=solar+charge+controller+schematic&rlz=1R2GGLL_en&aq=5&oq=solar+charge+controller+&aqi=g10

This again, most promising, several circuit projects and
schematics there.

You are only allowed 10 links in an answer here.
The last result is where I would start.
Sounds like an interesting project, best wishs to you.
Wingman

BEST SOLAR PANEL MANUAL


Sunforce 60032 30 Amp Digital Charge Controller


Sunforce 60032 30 Amp Digital Charge Controller


$78.52


Prevents overcharging of 12volt batteriesProtects battery from overcharge and dischargeFor use with 12 volt Solar Panels and batteries onlyHandles up to 30 Amps of Array currentHandles up to 500 Watts of solar powerMaintenance free protection of your solar panel and batteriesMaintains battery voltageMaintain 12 volt batteries in a fully charged state1 Year Warranty…


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