Fox ESS

What Fox ESS does

Fox ESS Co., Ltd. is a Wenzhou, China-based, privately held renewable energy hardware company founded in 2019 that designs and manufactures solar PV inverters (S, G, F, T, R series), hybrid inverters (H1/AC1, H3/AC3, H3 PRO, KH/KA), lithium battery storage systems (EQ low-voltage, EP and CQ-series high-voltage), commercial and industrial storage (G-Max Plus, Power Beast), EV chargers (A and L series), and heat pumps (HP and HP BOX). The product stack is unified by the FoxCloud 2.0 monitoring platform and increasingly by joint silicon-carbide technology development with Infineon Technologies, which powers the next-generation PQ3-Ultra residential system. Cumulative installed base exceeds 890,000 PV inverters and 1,000,000 batteries across more than 70 countries, with the company's footprint anchored by a Phase II factory in Wenzhou (46,000 m², target 50 GW annual capacity) launched in June 2026.

Fox ESS generates revenue primarily through one-time hardware sales across four streams: residential energy storage, commercial and industrial storage, EV chargers, and heat pumps. The company operates a pure channel model — products are sold through authorized distributors (Solar Juice, OSW, GPC Europe, VDH Power, Koninklijke Oosterberg, DQA Solar), financing partners (ICBC Thai Leasing), and a certified Elite Installer network (initially Germany and UK), with end customers split between residential homeowners (the primary segment) and commercial and industrial buyers (G-Max Plus deployments). Pricing is quote-based through distribution and not publicly disclosed, with one disclosed UK retail price point of £500–£1,000 for the MiniQube plug-and-play battery. Recurring/optional revenue is emerging through Virtual Power Plant integrations with Origin Loop and Amber Electric, which allow installed batteries to participate in grid services.

The company's market position is anchored by No. 1 global market share in residential energy storage for 2025 per S&P Global Energy, top positions in Germany and the UK, a record 97% System Performance Index from HTW Berlin and AQUU Research, BNEF Tier 1 status (Q4 2024), and inclusion in the Hurun Global Unicorn Index 2024 (implying a $1B+ valuation). The customer base is broad-based — only two named enterprise references (Ovos da Terra poultry farm in Brazil, Shandong Goldencell Electronics in China) appear in the source data — with the bulk of volume driven by distributed SMB/residential sales through the installer channel. Recent strategic moves include the 10 GWh Australian distributor agreements, the Infineon PQ3-Ultra co-development, the Sydney regional office, the ICBC Thai financing partnership, and a comprehensive rebrand in May 2026.

Name

Fox ESS

Legal name

FOXESS CO., LTD.

Website

https://in.fox-ess.com

Company type

Private

Founded year

2019

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

Fox ESS designs and manufactures solar inverters, lithium battery storage systems, hybrid inverters, EV chargers, and heat pumps for residential and commercial customers across more than 70 countries. The company holds No. 1 global market share in residential energy storage (2025) and distributes primarily through authorized installer and distributor networks.

Ownership category

akta.pro rank

Product category

Solar Inverters and Energy Storage Systems

NAICS

Turbine and Turbine Generator Set Units Manufacturing (333611), Other Electric Power Generation (221118)

SIC

Switchgear & Switchboard Apparatus (3613), Electronic & Other Electrical Equipment (No Computer Equip) (3600), Electronic Coils, Transformers & Other Inductors (3677)

akta.pro industry

PRIMARYEUAMAHAB

Solar Inverters, Power Optimizers & MLPE Manufacturing

Energy, Utilities & Environment/Renewable Energy (Solar, Wind, Hydro & Geothermal)/Renewable Equipment & Component Manufacturing (Modules, Turbines, Inverters, Towers, Blades)

SECONDARYEUAMABAE

Solar Inverters, Power Electronics & MLPE (String/Central Inverters, Optimizers, Microinverters)

Energy, Utilities & Environment/Renewable Energy (Solar, Wind, Hydro & Geothermal)/Solar Energy (PV, CSP, Rooftop & Utility-Scale)

SECONDARYEUACAGAC

PV Balance of System (BOS) & Electrical Infrastructure (Inverters, Transformers, Cabling, Substations)

Energy, Utilities & Environment/Electric Power Generation/Solar Power Generation (Utility-Scale PV & CSP)

SECONDARYEUAFAIAH

Harmonic Filtering, Power Quality & Active Front-End (AFE) Solutions

Energy, Utilities & Environment/Energy Storage & Grid Flexibility (Batteries, Hydrogen Storage, Demand Response)/Grid-Forming Inverters, Power Electronics & PCS

SECONDARYEUADAPAF

Renewables Monitoring & Controls (Solar/Wind/Hydro Edge)

Energy, Utilities & Environment/Electric Transmission & Distribution (T&D)/Energy IoT & Smart Grid/Utilities Edge

SECONDARYEUAMAIAG

DERMS/ADMS & Grid Operations Software Integration (Dispatch, Constraint Mgmt)

Energy, Utilities & Environment/Renewable Energy (Solar, Wind, Hydro & Geothermal)/Renewable Grid Integration & Interconnection (Power Electronics, SCADA, Forecasting)

Keywords

• Solar inverters
• Energy storage systems
• Hybrid inverters
• Lithium-ion batteries
• Renewable energy hardware

Headquarters

HQ city

Wenzhou

HQ country

China

HQ region

Asia

Offices3 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Technology or R&D, Personnel, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Hardware Sales - Residential Energy Storage: Sale of residential battery storage systems, hybrid inverters, and related components to homeowners and installers. Products include PQ3-H3-Ultra, AVO28 Avocado micro storage, and EQ/EP battery series.
2. Hardware Sales - Commercial & Industrial Storage: Sale of C&I energy storage systems including G-Max Plus (125 kW nominal power, 241 kWh nominal energy) and Power Beast for commercial and industrial applications.
3. EV Chargers: Sale of A Series and L Series EV chargers (7.3kW/11kW/22kW) featuring smart charging, OCPP compliance, dynamic load balance, solar linkage, and multiple connectivity options.
4. Heat Pumps: HP Series and HP BOX Series heat pumps using R290 refrigerant with A+++ efficiency rating, capable of 75°C outlet temperature and stable operation at -25°C ambient temperature with EVI technology.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels5 records

Core offering

Fox ESS designs, manufactures, and sells integrated renewable energy hardware including solar PV inverters (single-phase and three-phase grid-tie), hybrid inverters, lithium-ion battery storage systems (low-voltage EQ and high-voltage EP/CQ series), commercial & industrial all-in-one BESS (G-Max Plus), residential all-in-one storage systems (PQ3 series, Power Q, AVO28), EV chargers (A/L/A-Lite series), and R290 heat pumps (HP/HP BOX series). Products are managed through the FoxCloud 2.0 smart monitoring platform and support Virtual Power Plant (VPP) integration with platforms such as Origin Loop and Amber Electric for grid services revenue.

Product overview

Fox ESS is a global renewable energy solutions provider offering a comprehensive, integrated energy ecosystem spanning residential, commercial & industrial (C&I), and utility-scale applications. The portfolio centers on five interconnected product domains: (1) PV grid-tie inverters (S, G, F, T, R series) for solar conversion; (2) Hybrid inverters (H1/AC1 single-phase, H3/AC3 and H3 PRO three-phase, KH/KA) that integrate solar generation with battery storage; (3) Lithium battery systems including the EQ low-voltage stackable series, EP high-voltage series, and newer CQ-series high-voltage batteries (CQ6, CQ7); (4) C&I storage solutions including the G-Max Plus all-in-one BESS and Power Beast (H3 Plus + CQ7); and (5) connected end-use products including A/L Series EV chargers and HP/HP BOX heat pumps. These hardware products are managed through the FoxCloud 2.0 smart monitoring and control platform, which also enables Virtual Power Plant (VPP) participation via integrations with platforms like Origin Energy Loop and Amber Electric. Fox ESS holds the No. 1 global market share in residential energy storage (per S&P Global Energy 2025) and a record 97% System Performance Index (per HTW Berlin / AQUU Research 2026), demonstrating leading efficiency across its inverter-battery ecosystem.

Differentiator

Problem solved

Functional benefit

Products and services

• S Series PV Inverter Single-phase grid-tie PV inverter series (S/G2 generation) for residential solar installations, part of Fox ESS's core inverter portfolio.
• G Series PV Inverter Single-phase grid-tie PV inverter series for residential solar installations.
• F Series PV Inverter Single-phase grid-tie PV inverter series (G2 generation) for residential PV installations.
• T Series PV Inverter Three-phase grid-tie PV inverter series (G3) for commercial solar installations.
• R Series PV Inverter Industrial and commercial core PV inverter series with 110 kW capacity for large-scale commercial installations (e.g., deployed at Shandong Goldencell Electronics with 5,088.26 kWp total capacity).
• H1/AC1 Hybrid Inverter Single-phase hybrid inverter series (G2) that integrates solar generation with battery storage for residential backup power and self-consumption optimization.
• H3/AC3 Hybrid Inverter Three-phase hybrid inverter series for residential and light commercial energy storage applications, enabling solar generation, battery storage, and grid interaction.
• H3 PRO Hybrid Inverter Three-phase hybrid inverter available in 15-30 kW models, supporting dual independent battery inputs and configurations from 23.96 kWh to 144 kWh. IP65 rated, VPP-compatible with Amber and Origin Loop platforms, built-in Wi-Fi and LAN, 10-year warranty.
• KH/KA Hybrid Inverter Series Hybrid inverter series for residential and commercial applications, complementing the H-series lineup.
• Microinverter Microinverter product line for module-level power electronics in residential solar installations.
• EQ Series Battery High-performance, scalable low-voltage battery storage system including EQ3300 (3.20 kWh), EQ4800 (4.66 kWh), and EQ5000 (4.92 kWh) models. Features 90% depth of discharge, stackable up to 7 modules in series, >95% charge/discharge efficiency, and operating temperature range of 0-55°C charge and -10-55°C discharge.
• EP Series Battery High voltage battery series including EP5 (scalable to 10.4 kWh) and EP11 (scalable to 20.8 kWh), with 90% depth of discharge, IP65 protection, and compact wall/floor-mount installation.
• CQ6 High Voltage Battery High-voltage modular battery energy storage system with individual units of 5.99 kWh capacity scalable to 83.86 kWh per stack, with system capacity reaching 251.58 kWh when paired with the H3 Plus inverter. Features >95% round-trip efficiency and 100% depth of discharge, qualifying for Australia's Cheaper Home Batteries Program.
• CQ7 Battery High voltage battery module used in combination with the H3 Plus inverter as part of the Power Beast commercial storage solution.
• G-Max Plus C&I Storage System All-in-one battery energy storage system (BESS) for commercial and industrial applications. 125 kW nominal power and 241 kWh nominal energy capacity using LFP (LiFePO4) batteries, integrating photovoltaic generation, storage, management, and critical load support.
• Three-Phase ESS (C&I Storage) Commercial and industrial energy storage systems in three-phase configurations for business and industrial facilities.
• Power Beast (H3 Plus + CQ7) Commercial and industrial energy storage solution combining the H3 Plus three-phase hybrid inverter with CQ7 battery modules for large-scale C&I deployments.
• PQ3-Ultra Residential Storage System Next-generation all-in-one residential energy storage system jointly developed with Infineon Technologies, using full-SiC solutions to achieve 98.78% PV grid-tied efficiency and 98.47% battery charge/discharge efficiency with 70% reduction in switching losses.
• PQ3-H3-Ultra Residential System Residential energy storage system achieving a record System Performance Index (SPI) of 97% — top-ranked by HTW Berlin and AQUU Research. Part of Fox ESS's flagship residential product line.
• AVO28 Avocado Micro Storage Residential micro storage solution unveiled at SNEC 2026 and Intersolar Europe 2026, designed for compact home energy storage applications.
• Power Q Series Residential energy storage system available in single-phase and three-phase configurations with LFP lithium-ion batteries. Delivers up to 89.6% round-trip efficiency, supports whole-house load backup with built-in 63 A gateway, and is designed for VPP applications with 5-second power scheduling.
• P100 All-in-One System Residential energy storage system (6 kW + 10 kWh) combining solar compatibility, battery storage, and smart monitoring to reduce electricity bills and maintain power during grid disruptions. Deployed in Malaysia, Thailand, and Vietnam through local partnerships.
• MiniQube Plug-and-Play Battery Plug-and-play residential battery designed to plug directly into a standard three-pin socket. Enables users to store cheap off-peak electricity for use during peak pricing hours. Estimated cost of £500-£1,000 each with potential annual savings of £125-£228.
• A Series EV Charger European standard AC EV charger available in 7.3kW/11kW/22kW power ratings with plug, socket, and shutter variants. Features smart charging, OCPP 1.6/2.0.1 compliance, dynamic load balancing, solar linkage, and scheduling via app.
• L Series EV Charger AC EV charger in 7.3kW/11kW variants with smart charging capabilities, OCPP compliance, and solar linkage for integrated home energy management.
• A-Lite EV Charger Series Lightweight EV charger series launched as part of Fox ESS's expanded EV charging product line, showcased at Intersolar Europe 2026 and The Smarter E Europe 2026.
• HP Series Heat Pump Heat pump system using R290 refrigerant with A+++ energy efficiency rating, capable of delivering water up to 75°C and operating stably at -25°C ambient temperature using EVI technology. Features full DC inverter technology and smart control with OTA updates and SG Ready compatibility.
• HP BOX Series Heat Pump Comprises Hydro Box and Hydro Module components for hydronic heating and domestic hot water applications, utilizing inverter technology and smart control for integration with solar storage systems.
• FoxCloud 2.0 Fox ESS's smart monitoring platform that enables remote monitoring and management of energy storage systems, PV inverters, and EV chargers via web portal or smartphone app, with OTA remote software upgrades and SG Ready compatibility for heat pump integration.

Quantifiable outcome

• 98.78% PV grid-tied efficiency achieved with PQ3-Ultra system
• +3 more outcomes

Named customers2 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

Feature4 records

Partnerships

Ten partnerships are on record, tiered core and minor.

• Solar JuicecoreChannel Partner/ Reseller/ Distributor · 12 June 2026Fox ESS signed 5 GWh strategic battery energy storage agreement with Solar Juice, one of Australia's leading renewable energy distributors, at SNEC exhibition in Shanghai. Agreement sets two-year supply target and extends partnership established in October 2025 when they signed first large-scale supply contract. Deal reinforces Fox ESS position as leading energy storage provider in Australia.
• OSWcoreChannel Partner/ Reseller/ Distributor · 12 June 2026Fox ESS signed 5 GWh strategic battery energy storage agreement with Australian distributor OSW at SNEC exhibition. Partnership sets two-year supply target for residential, commercial, and industrial energy storage solutions in Australia and potentially beyond, combining OSW's global distribution network with Fox ESS energy storage technology.
• Infineon TechnologiescoreStrategic or Co-development Partner · 8 June 2026Joint development partnership to create next-generation PQ3-Ultra residential storage system using Infineon's SMD full-SiC solutions achieving 98.78% PV grid-tied efficiency and 70% reduction in switching losses.
• ICBC (Thai) Leasing Company LimitedcoreStrategic or Co-development Partner · 8 April 2026Fox ESS and ICBC (Thai) Leasing Company Limited signed strategic cooperation agreement at Thailand New Product Launch Ceremony 2026 in Bangkok to provide financing options making solar and storage solutions more accessible to Thai customers.
• GPC EuropecoreChannel Partner/ Reseller/ Distributor · 16 March 2026Strategic partnership announced at Solar Solutions Amsterdam 2026 to expand distribution across Dutch market. Part of broader European market expansion strategy.
• VDH PowercoreChannel Partner/ Reseller/ Distributor · 16 March 2026Strategic partnership to expand sales and support in the Netherlands, announced at Solar Solutions Amsterdam 2026.
• Koninklijke OosterbergcoreChannel Partner/ Reseller/ Distributor · 16 March 2026Strategic partnership to expand distribution across the Dutch market and Europe, announced at Solar Solutions Amsterdam 2026.
• Origin EnergycoreStrategic or Co-development Partner · 16 February 2026Fox ESS partnered with Origin Energy enabling Australian owners of Fox ESS home battery storage systems to join Origin's Loop virtual power plant program. Integration connects Fox ESS batteries to Origin's automated VPP network managing distributed energy resources to provide grid services and generate participant revenue.
• Amber ElectricminorStrategic or Co-development Partner · 12 February 2026Fox ESS VPP partnership with Amber Electric enabling customers to participate in virtual power plant programs and earn credits towards energy bills by supporting the grid.
• DQA SolarminorChannel Partner/ Reseller/ DistributorFox ESS SEA partnership with local partner DQA Solar in Vietnam, conducting two-day solar roadshow to showcase Fox ESS SEA's latest technologies designed to improve system efficiency, reliability, and scalability in Vietnamese market.

Scale indicators10 records

Recent moves8 records

Expansion highlights8 records

Direct peers

• Sungrow Power Supply: Chinese-founded global leader in solar inverters and energy storage systems, directly competing with Fox ESS across residential, C&I, and utility-scale segments. Both companies target the same installer and distributor channels in Europe, Australia, and emerging markets.
• GoodWe: Chinese solar inverter and energy storage manufacturer with overlapping residential and C&I product lines. Competes with Fox ESS on hybrid inverters, batteries, and smart monitoring platforms across Europe, Australia, and Asia.
• SolarEdge Technologies: Israel-headquartered manufacturer of DC-optimized inverters and residential energy storage. Overlaps with Fox ESS in residential hybrid inverter and battery categories across European and Australian markets.
• Enphase Energy: US-headquartered leader in microinverters and home battery systems (IQ Battery). Competes with Fox ESS in residential solar-plus-storage, particularly in markets like the US, UK, and Australia, with a strong installer channel.
• SolaX Power: Zhejiang-based Chinese manufacturer of hybrid inverters and battery storage systems. Closely comparable to Fox ESS in product portfolio (hybrid inverters, lithium batteries) and go-to-market model (distributor-led) across European and Australian markets.
• BYD Energy Storage: Chinese vertically integrated battery and energy storage manufacturer with both cell manufacturing and system integration. Competes with Fox ESS in C&I and residential battery storage, often with cost advantages from internal cell production.
• Huawei Digital Power: Major Chinese competitor in smart PV and energy storage, particularly strong in utility-scale and C&I segments. Targets the same installer and developer channels as Fox ESS with string inverters and grid-forming storage solutions.
• SMA Solar Technology: German-headquartered inverter pioneer offering residential, commercial, and utility-scale inverters plus battery storage systems. Competes with Fox ESS particularly in the German and broader European residential storage market.
• Growatt: Shenzhen-headquartered manufacturer of solar inverters and battery storage solutions with strong residential and C&I presence. Competes directly with Fox ESS on price, distribution, and product range across global markets.

Broad incumbents

• Tesla Energy: Tesla's energy business (Powerwall, Powerpack, Megapack) is a direct competitor in residential and C&I storage. Tesla's broader EV, software, and brand position make it a scaled incumbent adjacent to Fox ESS's residential and commercial markets.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks7 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/foxess
• Xx.com/fox_ess_
• Facebookfacebook.com/FoxESSglobal

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Fox ESS