... ,EASY TO OPERATE 3.LONG WORKING TIME high quality lower price solar power system On-Grid,Off-Grid Solar Power ... acid battery, controller, breaker, bracket and pole. In installation, it utilizes independent power supply system, without buried cables, charging automatically, simple ... wave: Pure sine wavePrecision of output voltage: 220V±3%Precision of output frequency: 50HZ±0.1%False output wave of ...