SUNGOLDPOWER 4000W Peak 12000W Pure Sine Wave Power Inverter, Low Frequency Inverter DC 48V AC 110V Converter, With 40A MPPT Solar Charger Controller *SP-PV Series Pure Sine Wave Inverter is a combination of an inverter, AC charger, Mppt solar charger and Auto-transfer switch into one complete system.It is packed with unique features and it is one of the most advanced inverter/chargers in the market today *Our Low Frequency Inverter is designed with AC priority by default. This means, when AC input is present, the battery will be charged first, and the inverter will transfer the input AC to power the load.The AC Priority and Battery Priority switch is SW4.When you choose battery priority, the inverter will inverting from battery despite the AC input *SP-PV Series Inverter is equipped with a powerful charger of up to 120Amp (depending on Model).The overload capacity is 300% of continuous output for up to 20 seconds to reliably support tools and equipment longer. the max chargecurrent can be adjusted from 0%-100% via a liner switch at the right of the battery type selector.This will be helpful if you are using our powerful charger on a small capacity battery bank * Features: Low Frequency Inverter, Smart Remote Control, Automatic Generator Starting (AGS), Support Solar Panel with MPPT Function. 8 pre Set Battery Type Selector plus De-sulphation for Totally Flat Batteries. 4-step Intelligent Battery Charging, PFC (Power Factor Correction) for Charger. 8 ms Typical Transfer Time Between Utility & Battery, Guarantees Power Continuity. 15s Delay Before Transfer when AC Resumes, Protection for Load when Used with Generator *Applicantion:for all the kinds of load:circular saws,drills,grinders,sanders,buffers,weed and hedge trimmers, air compressors.computers,printers,monitors,facsimile machines, scanners.vacuum cleaners, fans, fluorescent and incandescent lights,shavers, sewing machines.coffee makers, blenders,ice markers, toasters.metal halide lamp, high pressure sodium lamp.television, VCRs,video games, stereos,musical instruments, satellite equipment ect