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12 Volt 20 Amp Solar Charge Controller

12 Volt 20 Amp Solar Charge Controller

It regulates the power flowing from a photovoltaic panel into a rechargeable battery. It features easy setup with one potentiometer for the float voltage adjustment, an equalize function for periodic overcharging, and automatic temperature compensation for better battery charging over a wide range of temperatures.
The design goals of this circuit were efficiency, simplicity, reliability, and the use of field replaceable parts. A medium power solar system can be built with the SCC3, a 12V solar panel that is rated from 100 milliamps to 20 amps, and a lead acid or other rechargeable battery that is rated from 500 milliamp hours to 400 amp hours of capacity.



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It is advisable to match the solar panel’s maximum current to the battery’s amp-hour rating (C), a typical battery charging current is C/20, so a 100 amp hour battery should have a solar panel rating of around 5 amps. Consult the battery manufacturer’s data sheets for the best rating

Specifications:

Maximum solar charging current: 20 Amps
Nominal battery voltage: 12V.
Night time battery current drain: 1.3ma

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