FoxESS Solar Inverters

FoxESS is one of the youngest names in inverters. Fox ESS Co., Ltd. was set up in early 2019, is headquartered in Wenzhou, Zhejiang, and belongs to the Tsingshan group, one of the world’s largest stainless steel and nickel producers. It opened research centers in Wuxi, Shanghai and Wuhan and built a Wenzhou production base sized for a million inverters a year.

FoxESS has sales and service teams in markets from the UK, Poland and the Netherlands to Pakistan, South Africa, Brazil and Australia, and was rated a Tier 1 inverter brand by BloombergNEF in 2024. In 2025 it filed for a stock market listing.

FoxESS inverter range

Storage is the focus. The single-phase H1 G2 hybrids cover 3 to 6 kW, the EVO and PowerCube PQ1 models reach 12 kW, and the three-phase H3 Smart (5–15 kW) and H3 Pro (15–30 kW) serve larger homes and small businesses. H3 Plus hybrids of 50–125 kW handle commercial rooftops, and the KH series is built for Australia.

For systems without a battery there are the single-phase F series and the three-phase T series of 3–25 kW, now in its third generation (G3), plus M1 and Q1 microinverters up to 2.5 kW. The letter tells you the phase: H1 and F are single-phase, H3 and T three-phase.

What FoxESS is known for

Reviewers point to solid hardware: Clean Energy Reviews praised the build quality, the component choice and a rear heat sink with about 30% more surface area. FoxESS also makes its own batteries, so inverter and storage can come from one brand.

The flip side is a short track record: with a founding date of 2019 there is less long-term field data than for older brands, and service depends on the local FoxESS team and your installer.

Matching panels to a FoxESS inverter

The per-tracker current is the number to watch. Smaller T-G3 models (3–12 kW) and the F series take 14 A per maximum power point tracker (MPPT), and the H1 G2 hybrids 16 A. Panels with 182 mm or 210 mm cells often run at 13–18 A, so the inverter caps the current and some energy is lost; if a panel’s short-circuit current is above the limit, choose another model. The H3 Smart takes 20 A, the T15–T25 G3 28 A and the H3 Pro 32 A.

Voltage is simpler. Single-phase H1, EVO and F models allow 600 V and track between 80 and 550 V, so a string must stay under 600 V on the coldest morning your site records; the KH series tracks only up to 500 V. Three-phase models allow 1,000–1,100 V. The string calculator runs the cold-voltage, MPPT-window and current checks against the exact FoxESS model you pick.