Protect your solar panels and batteries with this Nature Power 60 Amp MMT Solar Charge Controller. Advanced MPPT charge efficiency, 15% ~20% greater than traditional PWM. Rate Charging Current up to 60A, support multiple voltage systems so that all of your appliances are protected. Made of rugged aluminum alloy material, fast heat dissipation base and a built in fan this is an excellent built charge controller.Solar charge controllers are for permanent installation and should be installed close to the battery in a dry and ventilated area.