Main Features: Beneficial to Solar or Wind System: On cloudy or windless when your battery gets low, it will automatically switch to grid power, your battery. Works like an opposite direction UPS: The controller will switch to grid power when batteries votagle are lower than cut off point,it will switch back to battery power when the batteries votagle are higher than point. Auto distinguish: DC 12/24/48V,AC 100-120V 60HZ / 220-240V 50HZ auto distinguish. can define the Cut-Off and Voltages. voltage must be higher than Cut-off voltage. Battery type: Suitable for Sealed,Gel,Lead-acid,Lithium battery and so on. as long as the voltage of your battery are within the voltage ranges in the followings.9-17V at 12V system;18-30V at 24V system; 30-60V at 48V system. Big Power: 5.5kw(110V) or 11KW(220v),Fast time:Inverter to public power 10ms,public power to inverter 16ms. Material: plastic Color: as shown LCD display: Battery real-time voltage;working status of public power,inverter and battery. Note: The controller needs to connect the battery, powered by the battery and battery power data. Package Contents: 1 x Solar Charge Controller Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.