Max. Efficiency up to 98.2%. Up to110% phase unbalanced output available on both on-grid and back-up outputs Powerful load adaptability, support loads stable access.-oled display+App,two ways for data checking and management. 140-750V wide battery connection range to store more energy and optimize self-sufficiency rate. Arbitrary phase of back-up output allows up to 125%overloading ability. Maximum 200% back-up output overloading @60s. Uninterruptible power supply,switch to off-grid mod ewithin 10ms.