3KW Heavy Duty Caravan Power Inverter

FI-3KW Low-Frequency Pure Sine Wave Inverter
Manufactured by Foshan Top One Power Technology Co., Ltd.
The FI-3KW is a 3000 W off-grid, low-frequency inverter from Foshan Top One Power Technology Co., Ltd., a Guangdong-based manufacturer of power conversion equipment established in 2003. The FI-3KW belongs to the FI Series, which covers models from 1KW to 6KW. It is designed for use with residential solar systems, in remote cabins and small workshops, and for backup power applications where reliable AC power is essential.

The FI-3KW's low-frequency design with a heavy toroidal transformer sets it apart. It delivers 3 kW of continuous power and can handle up to 9 kW in surges - three times the rated output. This additional power is important because motors, compressors, refrigerators and pumps draw several times more current when starting up than when running. The FI-3KW produces a pure sine wave with low harmonic distortion, enabling sensitive electronics such as computers, medical devices and audio equipment to operate without glitches or interference.

The unit runs on a 24 V DC battery system and accepts AC input from 165 V AC to 275 V AC, with automatic frequency detection for both 50 Hz and 60 Hz. Another practical feature of the FI-3KW is its adjustable AC charging current of up to 35A, which allows you to match the charge rate to your battery bank and extend battery life. It also has an automatic transfer switch that moves between battery and grid power in under 5 ms, ensuring that connected equipment continues to run without interruption. The inverter uses dual-MCU intelligent control for stable performance, and the LCD display clearly shows voltage, load, and system status.

Protection is provided against over-voltage, under-voltage, overload, short circuit and overheating. The FI-3KW supports multiple battery types, including sealed, AGM, gel and lithium. Backed by ISO 9001 and CE certifications from Foshan Top One Power Technology Co., Ltd., it is built for real-world use - straightforward, capable and dependable for anyone.

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