You need a charge controller to charge a battery. This charge controller prevents reverse current which can flow from battery to solar cells. Solar charge controller work is to avoid battery over charge. A must for solar panel DIY project
Suitable for many types of batteries including lithium battery, iron phosphete, NIMh and other batteries Also suitable for charging home UPS batteries.
If you are using 6V battery then use 9V Solar panel and if you are using 12V battery use 18V solar panel. Selection of voltage is done automatically.
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