4KW Heavy Duty MPPT Solar Inverter

The FSI-402M60 low-frequency hybrid solar inverter is engineered by Foshan Top One Power Technology Co., Ltd.
The FSI-402M60 is a high-performance hybrid solar inverter manufactured by Foshan Top One Power Technology Co., Ltd., a National High-Tech Enterprise founded in 2003 that has over two decades of experience in providing new energy power conversion solutions. As the flagship model in the FSI series, it integrates solar charge control, inverter conversion and intelligent battery management in a single, compact unit. This makes it an ideal solution for residential off-grid systems, rural electrification projects, communication base stations and remote field operations.

At the core of the FSI-402M60 is a robust power-frequency toroidal transformer designed for stability and long-term reliability. This robust design delivers an exceptional surge capacity of 12 kW - three times its continuous 4 kW output - enabling the seamless start-up of high-inrush inductive loads, such as air conditioners, refrigerators, water pumps and industrial motors, without tripping the system or degrading its performance. The pure sine wave output maintains total harmonic distortion below 3%, ensuring clean, stable AC power to protect sensitive electronics, including medical devices, computers, and communication equipment.

The FSI-402M60 incorporates an advanced MPPT (maximum power point tracking) solar charge controller that dynamically adjusts to changing light conditions, boosting overall power generation efficiency by up to 25% compared to conventional PWM technology. Available with 30A or 50A MPPT options, the unit works in tandem with an intelligent, three-stage charging algorithm (constant current, equalisation and float) that extends battery cycle life while minimising losses from improper charging. The inverter supports 24V or 48V battery configurations and is compatible with lead-acid, AGM and gel battery types, offering exceptional system flexibility.

Hot Tags: 4kw heavy duty mppt solar inverter, China, manufacturers, suppliers, factory, customized, quotation, low price, buy discount, pricelist