SMAKN Solar Panel Charge Regulator Controller 15A 12V 24V Auto Switch Easy to set up and operate.Suitable for small solar energy system. 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.