[3 in one power inverter charger] The inverter transforms 48V DC power stored by batteries to AC electricity that can power the tools and appliances. Built-in 40 amp battery charger which help the grid or generator to recharge the battery. Automatically switch between shore power and battery power within 10 mili seconds..[4000W 48v split phase inverter] It requires 240VAC input and can provide 120V/240VAC output power for the appliances with output 50 or 60Hz, come along with low frequency, low idle current, BTS cable, remote control, making this inverter perfect for home and business applications.[AC/Battery Priority] Our solar inverter is designed with AC priority by default, The inverter feature auto generator start to start up a generator when battery voltage goes low. and turn the generator off after battery charging is finished..[Compatible with various batteries] Work with Gel USA, AGM, Lithium, LiFePO4, LFP batteries.The max charge current can be adjusted from 0%-100% by the charge current control knob. It is helpful if you use the inverter to charge a small capacity battery bank..[Pure sine wave solar inverter]This inverter charger is capable of delivering full rated 4000 watts with an exceptional 300% surge capacity for 20 seconds, which can effective power your electronic devices, household appliance and power tools, especially the tools and appliances with startup surges, such as refrigerator, freezer, microwave.