HSI MAX Series Hybrid Solar Inverter is our flagship toroidal low-frequency inverter designed for residential off-grid energy storage and household backup power, and this HSI MAX Series Hybrid Solar Inverter covers six complete power models ranging from 1.5KW to 6KW, including HSI-MAX-152, HSI-MAX-202, HSI-MAX-302, HSI-MAX-402, HSI-MAX-502 and HSI-MAX-602, fully matching diverse household power consumption demands. Equipped with premium industrial toroidal transformer, it delivers triple surge power from 4.5KW up to 18KW, effortlessly driving heavy inductive loads like air conditioners, water pumps and kitchen electrical appliances without overload shutdown. It outputs stable pure sine wave 220VAC with built-in AVR stabilizer, keeping voltage fluctuation within ±3% to well protect smart home devices and precision electronics, while transfer efficiency reaches over 85% to cut energy loss and boost solar utilization.

This all-in-one unit integrates adjustable AC charger and high-current MPPT solar charger, supporting wide PV open circuit voltage and large PV array input power up to 3400W on 48V models. It is widely compatible with 12V, 24V and 48V battery systems, perfectly adapting to Gel, SLA, AGM and lithium batteries, with 60-second delayed overcharge alarm protection to extend battery service life. Four intelligent switchable working modes, namely mains priority, ECO energy-saving, DC battery priority and unattended auto mode, satisfy all daily power usage habits, and the ≤4ms ultra-fast UPS transfer time ensures zero power interruption during sudden grid blackouts.

With a tough yellow alloy metal housing, it works stably under 0-60℃ operating temperature and 0-95% non-condensing humidity, suitable for rural off-grid homes, suburban villa energy storage, small workshop standby power and RV large solar systems. Every unit passes full-load aging test before delivery, featuring long service life and low failure rate. Compact structured size simplifies wall-mounted installation, and clear LCD display allows real-time monitoring of PV generation, battery status and load power for easy daily operation. It is a cost-effective, high-performance energy core solution for global solar installers and residential end users pursuing reliable off-grid power supply.