Feature:  - New item release: The controller allows for trouble-free operation of inverters and AC mains in the same circuit. The controller switches automatically between inverter and AC mains while protecting the inverter against external voltage.  - Works like an UPS, But in opposite direction: The controller will switch to grid when batteried are low to cut off point, once the batteries are back to recovery point, it will switch back to battery power.  - Great for solar and wind: Automatically switches over to grid power on those cloudy or windless days and your batteries get low, Take charge over your battery bank.  - Auto distinguish for DC 12/24/48V, AC 110/220V.  - LCD display.  - Transfer Time: Less than 10ms.  - Adjustable battery cut off low voltage and recovery voltage.  - Wiring diagram: Click here   - User manual: Click here     Parameter:  Rated power: 11kw/5.5kw;  Input voltage: Auto distinguish: AC 100-120V or AC 220-240V;  Output voltage: Auto distinguish: AC 100-120V or AC 220-240V;  Transfer time: Inverter transfer to public power less than 10ms, Public power transfer to inverter less than 16ms;  LCD display: Woking status of Public power, inverter and battery;  System voltage: Auto Distinguish: 12V or 24V or 48V;  BAT. Low Cut-down: Default 11V/22V/44V, adjustable;  BAT. Low Recovery: Default 13.5V/27V/54V, Adjustable;  Application: Off-grid solar or wind system;  Product size: 19*17*7.25cm(7.4in*6.7in*2.8in);  N.W/PC: 1.26KG;  G.W/PC: 1.63KG;    Package included:  1 x Solar Charge Controller