Specifications: Input Voltage: 22-50VDC Output Type: Single phase AC Size: 310 165 55mm Output Frequency: 50Hz /60Hz Output Voltage: 90-140VAC Output Current: 4.5A Directly connect to your solar panels do not need to connect the battery Pure Sine Wave Output. Automatic Sensing Function Solar Luminosity. Maximum Power Point Tracking MPPT. Constant Current, Constant Power. Automatically Shuts Down When There is a Power Output Fault. Current Limit Protection. Stack Multiple Machines. High Frequency High Conversion Rate.