How do solar charge controllers work?
Time to read 1 min
Time to read 1 min
The charge controller sits between your solar panel and battery. Although it seems deceptively simple, it actually serves a crucial function in the performance of solar power setups. Want to learn more? Read on to understand more about the benefits of using a solar charge controller.
A charge controller is an essential part of battery-based solar energy systems. It regulates the current and/or voltage, protecting batteries from overcharging to keep them safe and efficient. Without a charge controller, a solar panel could continue to deliver power to a battery even if it’s fully charged. The result? Damage to the battery and the dangerous risk of overheating.
On a basic level, charge controllers block reverse current and prevent batteries from overcharging. Some models also prevent battery over-discharge, protect from electrical overload and can even display battery status and power flow.
At night, solar panels can cause a slight discharge from the battery by passing current in the reverse direction. The charge controller helps to prevent this, making sure the current only passes through in one direction.
If you continue to feed energy to a fully charged battery, this can cause it to degrade rapidly and even overheat. The charge controller helps to reduce the flow of energy once your battery reaches a specific voltage. If the voltage drops for any reason, the controller allows the maximum possible charge again to keep everything powered up.
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