Any solar panel that is rated 12W or higher requires the use of a charge controller to regulate the current and voltage to the battery. Charge controllers prevent 12V batteries from overcharging or discharging, and reduce overall maintenance to help prolong battery life. Choose this plug-n-play 28A charge controller with LCD digital readout and Pulse Width Modulation technology for higher efficiency charge for up to 420W of solar array. They work with all 12V batteries and solar panels.
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