yueton Solar Controller 10a 12v/24v Solar Charge Controller Solar Panel Battery Regulator Safe Protection 12/24V Auto Switch Solar Controller,automatic detection of the voltage. Overloading & short-circuit protection.Reverse discharging & reverse-polarity protection. Under-voltage and over-charging protection. Prolong the battery life cycle and keep the load work well. Easy to set up and operate.Suitable for small solar energy system.