ECO-WORTHY 600W 110V MPPT Function Waterproof Grid Tie Inverter MC4 Quick Connect Pure Sine Wave Output---Use SPWM directly to make pure sine wave output. Power Automatically Locked (APL)--- automatically powers locked in maximum power point, made output Constant Current, Constant Power---constant current and output power, without any overload, over-cur High-Frequency High Conversion Rate--- Adapt high frequency converter, the output more efficient Maximum Power Point Tracking (MPPT)--- high-precision (MPPT) operation power, automatic and immedia