Energy FOX ESS

FOX ESS: an energy system from Tsingshan Group

The FOX ESS brand: an industrial backbone

FOX ESS is a Chinese solar energy equipment manufacturer founded in 2019 in Wenzhou, part of Tsingshan Holding Group — one of the world's largest producers of nickel and stainless steel. That industrial parent-company background gave FOX ESS access to large-scale manufacturing and financial stability, which for a buyer of equipment with a decade-long service life means a lower risk of the manufacturer disappearing from the market before the warranty period ends.

Range in the "Energy" category

In the "Energy" category, FOX ESS is represented by a full cycle of equipment for off-grid and backup power: single- and three-phase hybrid inverters from 5 to 125 kW, AC-coupled inverters for retrofitting existing storage into already-installed solar systems, LiFePO4 storage systems in the P100 series, and battery management modules (BMS) for monitoring battery bank condition. This range lets a buyer assemble a complete energy system from a single manufacturer — from a private home to a small commercial facility.

Hybrid and AC-coupled inverters, FoxCloud

FOX ESS hybrid inverters (the H1 and KH series) combine solar conversion and storage management in a single unit: they simultaneously take DC power from solar panels, charge the battery, and power the home grid, automatically switching sources depending on sunlight availability and battery state of charge. The AC-coupled KA series, by contrast, connects on the AC side and is built for sites that already have a solar array without a hybrid inverter — a cheaper way to add storage without replacing existing equipment.

The proprietary FoxCloud monitoring platform lets you track generation, consumption and charge state remotely via a mobile app or web interface, receiving alerts about faults or deviations before they become noticeable to the homeowner. For a system meant to run unattended for years, remote monitoring isn't a luxury — it's a practical tool for catching problems early.

G2 technology, three-phase solutions and LiFePO4 safety

The H1 and KH hybrid inverter line-up is built on the second-generation (G2) platform, which compared to the first generation offers higher conversion efficiency and a wider operating voltage range for solar panels — meaning less sensitivity to imperfect installation conditions, such as partial array shading or a non-standard roof orientation. For a homeowner, that translates directly into more generated electricity from the same installed panel array.

The three-phase P3 series hybrid inverters, spanning 5 to 125 kW, target not just private households but commercial facilities too — small production sites, retail spaces or administrative buildings with three-phase grid connections. The Plus series models at 50-125 kW cover facilities with significantly higher consumption without switching to a different manufacturer or product line.

The P100 storage systems are built on lithium iron phosphate (LiFePO4) cells — chemistry that's substantially safer than traditional lithium-ion batteries under overheating or mechanical damage, since it isn't prone to thermal runaway. For a home installation located in a living space or basement, that safety margin has direct practical value, not just theoretical significance.

The BMS module in the CQ16 series adds another layer of protection specifically for the battery bank: it balances individual cell charge levels, cuts power on abnormal voltage or temperature readings, and reports cell-level diagnostics back through the same FoxCloud interface used for the inverter — so a fault gets flagged at the component level rather than showing up only once the whole storage system underperforms.

Choosing FOX ESS equipment means buying into a coherent ecosystem, where the inverter, storage and monitoring system are designed by one manufacturer to work together, reducing compatibility risk and simplifying warranty support compared to assembling a system from components of different brands. Compare the models in the catalogue by power and connection type, and put together a set that fully covers your site's electricity needs.