solar controller CE certification maximum efficiency with MCUand PWM special anti-reverse protect waterproof function ... , overcharge, power full, power low, over-discharge, over load, out short circuit, load on/off, etc.Industry level production standard: wide temperature ... )Lower voltage indicate12.0V, ×2/24VOver discharge voltage11.1V(no load)- real-time modified voltage by the discharge rate; 2/24V ...