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Solar Cell Battery

Clyde Said:

Charging a battery using a solar cell?

We Answered:

I had similar issues when building a UPS myself. What happened was I hooked up a volt meter to the batter, and then attached a series of relay gates so that when it achieved full charge, the power generated was routed to the load, or if there is no load connected, a series of heavy duty (for long life) resistors. This prevents the battery from over charging, it may not be the best way to do this, but it will work for a while.

If using SLA batteries, you may not even need the gate system.

Jordan Said:

Is it possible to charge a 12v battery with a solar cell that only puts out 4.5 volts?

We Answered:

A DC voltage booster, DC voltage multiplier, or DC-DC Step-Up Converter is a very useful tool which enables a low source DC voltage to be boosted (stepped up) to a higher output DC voltage which is more useful.

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