Functional characteristics: It has the function of segmented charging and discharging. Backflow prevention and grid connection function. Insulation resistance and leakage current detection function. Working without battery under special conditions. Lithium battery activation function, which can be triggered by mains or PV. Power saving mode, reduce no-load loss. .Four charging modes: PV Only, Mains Priority, PV Priority and PV&Mains hybrid charging. Two output modes: mains bypass and inverter output, with UPS function. 360 all-round protection. Allow lead-acid battery and lithium battery access. ON/OFF switch controls the inverter AC output Grid-connected mode can be set. Design characteristics: Adopting full-digital double closed loop control, combined with advanced SPWM.technology and pure sine wave output. Advanced MPPT technology with efficiency of 99.9. LCD screen and three LED indicator lights can clearly indicate the status and data. Intelligent and variable-speed fan, efficiently dissipate heat and extend system life. Multiple safety protection functions: short circuit protection, overload protection,reverse polarity protection and so on.