Magicfly 20A 12V/24V Solar Charge Controller Solar Panel Battery Regulator Safe Protection Automatically manage the working of solar panel and battery in solar system. Overloading & short-circuit protection.Reverse discharging & reverse-polarity protection. Under-voltage and over-charging protection. Protection from lightning strike.Prolong the battery life cycle and keep the load work well. Easy to set up and operate.Suitable for small solar energy system.