Yingke Solar Power Off Grid Power Frequency Hybrid Inverter (1KW–4KW) delivers reliable pure sine wave output for residential and commercial solar systems. Designed for off-grid applications, it supports stable energy conversion, battery storage integration, and backup power solutions. Ideal for homes, farms, and remote installations. OEM and wholesale available. Features: Pure sine wave output Can support WIFI / GPRS MPPT efficiency max 98% Optional built-in MPPT/PWM30-60A controller DC start & automatic self-diagnostic function Automatically send signal to start generator High efficiency design for optimized battery performance Selectable charging current based on applications AC start-up voltage auto restart voltage Lead acid battery/Lithium battery