The HSI-501 is a compact and efficient hybrid solar inverter designed for small-scale backup power and off-grid applications. As a key model in the HSI series, it provides a rated power of 500 W and a surge capacity of 1500 W, making it ideal for powering essential electronics and small appliances. It features a pure sine wave output to ensure the safe and stable operation of sensitive devices such as laptops and medical equipment.

Operating on a 12V battery system, this model integrates a versatile charging system including an adjustable AC charger (up to 15A) and a 20A PWM solar controller. A notable advantage is its ultra-fast transfer time which functions like a UPS to provide uninterrupted backup power in the event of a mains failure. The unit is compatible with various battery types, including gel, SLA and lead-acid batteries, offering flexibility in system design.

The HSI-501 is equipped with multi-layer protection for comprehensive safety and long-term reliability. Its intelligent charging management system optimises battery life and performance. The inverter supports four distinct operating modes, like AC mains priority, ECO mode, DC battery priority and unattended mode , allowing users to customise its operation based on their specific needs.

solar inverter