Hello everyone, great forum.
I have recently set up a solar system on my RV. It works great. It utilizes a 30 watt solar panel that feeds a solar charger. Here is where I'm stuck. The solar charger gets an input of about 22 volts on a sunny day. Furthermore, in a open circuit test the output is also about 22 volts. My question is, why would you charge a 12 volt battery with 22 volts? Could somebody give me a hand and explain how this works and why it is done this way? Also, does this mean I could charge the battery with a 22 volt power supply? I've always thought a 12 volt battery must be charged with 12 volts.
Any help would be greatly appreciated.
I have recently set up a solar system on my RV. It works great. It utilizes a 30 watt solar panel that feeds a solar charger. Here is where I'm stuck. The solar charger gets an input of about 22 volts on a sunny day. Furthermore, in a open circuit test the output is also about 22 volts. My question is, why would you charge a 12 volt battery with 22 volts? Could somebody give me a hand and explain how this works and why it is done this way? Also, does this mean I could charge the battery with a 22 volt power supply? I've always thought a 12 volt battery must be charged with 12 volts.
Any help would be greatly appreciated.
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