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Battery Charging through Solar Panels

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Heya...

Can any one help me out in regulating the voltage from solar panel, so that i could charge the battery.
The chellenge is, the voltage from the Panel is fluctuating between the range (12V to 17V), but a need a regulated voltage of 12V(+2) for charging the 12V 20Ah battery.

Thanks
 
actually you need a regulated current to charge the battery. SLA batteries are only 10V when fully discharged. Get a charge regulator chip.

Dan
 
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