PH1800 Plus series hybrid solar inverter, it can realize self-consumption and feed-in to the grid from solar energy with best solution according to your setting. During the daytime solar power can run your home appliances and if there is extra solar power it will feed-in to the grid or you can choose to save them on the battery to backup when power failure or nighttime. Features: Rated Power 2KW-5.5KW Pure sine wave output Self-consumption and Feed-in to the grid Programmable supply priority for PV, Battery or Grid User-adjustable battery charging current suits different types of batteries Programmable multiple operation modes: Grid-tie, off-grid and grid-tie with backup Multiple communication for USB, RS-485, Modbus Monitoring software & Wifi Kit for real-time status display and control Parallel operation up to 3 units