Yingke Solar Power Frequency Hybrid Inverter (6.3KW / 8KW / 10KW) is designed for off-grid solar systems with high efficiency and stable performance. It features pure sine wave output, strong overload capacity, and intelligent battery charging management.Suitable for residential, commercial, and industrial solar energy storage systems. Features: Pure sine wave output Self design PCB board and cooling system MPPT efficiency max 98% Optional built-in MPPT controller High Efficiency Design & 'Power Saving Mode' to Conserve Energy Auto Restart when Ac in recovering Parallel Function Up to Maximum 9 Units Selectable charging current based on applications AC start-up voltage auto restart voltage Supports lithium battery communication and external WIFI