Harmony Energy

What Harmony Energy does

Harmony Energy is a UK-based developer, owner, and operator of utility-scale battery energy storage systems (BESS), solar PV farms, and wind power sites. Founded in 2010 and headquartered in Knaresborough with a London office and wholly-owned subsidiaries in France, Germany, and Poland, the company has developed, built, and brought online 737 MW across 18 projects — including three of Europe's largest operational BESS facilities (Pillswood at 98 MW/196 MWh, Bumpers at 99 MW/198 MWh, and Cheviré at 100 MW/200 MWh). Its core technology stack centers on Tesla Megapack lithium-ion batteries managed through Tesla's Autobidder Energy Management System, which dispatches stored energy into wholesale and balancing markets.

The company's revenue mechanics span the full project lifecycle: it originates sites through land partnerships, secures planning consents and grid connections, develops and constructs projects (often in joint ventures with partners such as TagEnergy, FRV, and First Renewables), and then either retains the asset under long-term ownership, sells operational projects to institutional investors and strategic energy companies (HEIT/Foresight Group, Alpiq, EDF Renewables Polska), or continues to provide asset management services. Primary revenue streams are one-time project development and sale proceeds, recurring managed services on retained/sold portfolios, and joint venture equity returns. Operations span the UK, France, Germany, Poland, Italy, and New Zealand, with a stated global pipeline exceeding 12.7 GW.

Name

Harmony Energy

Legal name

Harmony Energy

Website

https://harmonyenergy.co.uk

Company type

Private

Founded year

2010

Operating status

Operating

Headcount range

51–100 employees

Short description

Harmony Energy is a UK-based developer, owner, and operator of utility-scale battery energy storage systems and renewable energy infrastructure, serving institutional investors, grid operators, and strategic energy companies across Europe and New Zealand.

Ownership category

akta.pro rank

Product category

Utility-Scale Battery Energy Storage Systems

NAICS

Electric Power Generation, Transmission and Distribution (2211)

SIC

Cogeneration Services & Small Power Producers (4991)

akta.pro primary industry

Utility-Scale BESS Project Development & Ownership (IPP/Developer) (EUAFAAAA)

akta.pro secondary industries

Utility-Scale BESS EPC & Integration (EUAEAEAA), BESS Operations, Maintenance & Asset Performance Management (APM) (EUAFAAAG)

Keywords

• Utility-scale battery storage
• Renewable energy development
• Solar PV projects
• Wind power development
• Energy infrastructure services

Headquarters

HQ city

Knaresborough

HQ country

United Kingdom

HQ region

Europe

Offices5 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Asset Development and Ownership: Harmony Energy develops, builds, owns and operates renewable energy infrastructure projects including BESS, solar, and wind. The company generates revenue through the full project lifecycle from development through construction to operation, and monetizes assets through sales to institutional investors (such as HEIT, Foresight Group) or strategic acquirers (such as Alpiq, EDF Renewables).
2. Asset Management Services: Harmony Energy provides asset management services for BESS projects they have developed, including operational management of projects owned by Harmony Energy Income Trust (HEIT) and other investors.
3. Joint Venture Partnerships: The company enters joint ventures with partners (such as TagEnergy, First Renewables, FRV) for project development, sharing investment and returns.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels8 records

Core offering

Harmony Energy develops, builds, owns, and operates utility-scale battery energy storage systems (BESS), solar PV farms, and wind power sites across Europe and New Zealand. The company delivers end-to-end project lifecycle services including site acquisition, planning consents, construction, and operational asset management. Its BESS projects, primarily powered by Tesla Megapack batteries with Autobidder EMS, store excess renewable energy and dispatch it to the grid to provide balancing, frequency response, and capacity services.

Product overview

Harmony Energy operates as a unified renewable energy infrastructure platform offering utility-scale battery energy storage systems (BESS), solar PV farms, and wind power sites. The company develops, builds, owns, and operates projects across Europe and New Zealand. Key BESS projects include Pillswood, Bumpers, and Cheviré (France's largest), managed through the company's asset management services division. The portfolio spans over 700 MW operational capacity across 18 projects with a global pipeline exceeding 12 GW.

Differentiator

Problem solved

Functional benefit

Products and services

• Battery Energy Storage Systems (BESS) Utility-scale battery energy storage systems that store electricity from renewable sources and dispatch it to the grid when needed, supporting grid stability, frequency response, and energy security. Deployed for grid operators and sold to institutional investors and energy companies.
• Solar PV Farms Large-scale solar photovoltaic farms developed, built, and operated by Harmony Energy for renewable energy generation, including the Tauhei Solar Farm joint venture in New Zealand.
• Wind Power Sites Wind power installations developed and operated by Harmony Energy; the company has built and operated 15 wind power sites in the UK, providing project and technical expertise.
• Asset Management Services Operations, maintenance, and management services for battery storage, solar, and wind projects owned by Harmony Energy and third-party investors across Europe.
• Cheviré BESS Project 100 MW / 200 MWh battery energy storage project located at the port of Nantes Saint-Nazaire in France, using Tesla Megapack batteries with Autobidder EMS. Capable of storing enough energy to power 170,000 homes for up to two hours.
• Pillswood BESS Project 98 MW / 196 MWh battery energy storage system in Cottingham, UK, one of Europe's largest BESS facilities and a multiple award-winning project.
• Bumpers BESS Project 99 MW / 198 MWh battery energy storage system in Buckinghamshire, UK, recognised as Europe's joint-largest battery energy storage system.
• Clay Tye BESS Project Joint venture project with FRV (Fotowatio Renewable Ventures) located in Upminster, recognised as Europe's joint-largest battery storage system by MWh.

Quantifiable outcome

• 737 MW developed, built, and operating across 18 projects
• +3 more outcomes

Named customers7 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Seven partnerships are on record, tiered core and minor.

• AlpiqcoreOthers · 27 January 2026Alpiq, Switzerland-based electricity producer, acquired Cheviré BESS project (100 MW/200 MWh) from Harmony Energy, located at port of Nantes Saint-Nazaire. Alpiq also acquired the Marronniers 100 MW BESS project. This is part of Alpiq's strategy to expand flexible power and storage portfolio across Europe.
• FRV (Fotowatio Renewable Ventures)coreStrategic or Co-development PartnerFRV partnered with Harmony Energy on the Clay Tye BESS project, Europe's joint largest battery storage system by MWh. This is a joint venture where both companies contribute to development and share project benefits.
• TagEnergycoreStrategic or Co-development PartnerTagEnergy entered joint ventures with Harmony Energy on multiple projects including Jamesfield (49 MW/98 MWh) in Scotland and Chapel Farm battery storage facility. Global clean energy enterprise TagEnergy collaborates on development, construction, and operation.
• First Renewables (Clarus)coreStrategic or Co-development PartnerHarmony Energy and First Renewables, part of Clarus, formed a joint venture for Tauhei Solar Farm - New Zealand's largest solar farm project. The joint venture partners have completed financial close and started construction.
• EDF Renewables PolskacoreOthersEDF Renewables acquired Harmony Energy's 200 MW / 400 MWh Battery Energy Storage System project in Poland, representing a successful project exit for Harmony Energy in the Polish market.
• TeslacoreTechnology or IntegrationTesla supplies Megapack batteries to Harmony Energy for major projects including Cheviré in France. Tesla's Autobidder EMS manages the output and dispatch of stored energy. Tesla's Energy division reported record 9.4 GWh deployment, with Harmony Energy projects contributing significantly.
• IAPsolutionsminorStrategic or Co-development PartnerHarmony Energy participates in an international consortium led by IAPsolutions (Spanish tech company) for an R&D project on intelligent thermal desalination powered by photovoltaic energy. The consortium includes Morocco's IAV Hassan II and applies AI and advanced control systems to water purification.

Scale indicators13 records

Recent moves10 records

Expansion highlights6 records

Direct peers

• Zenobe Energy: UK-based battery storage developer and owner with operational BESS assets and EV fleet electrification services. Directly competes in UK BESS development with similar technology approach and institutional investor backing.
• FRV (Fotowatio Renewable Ventures): Global renewable energy developer owned by Abdul Latif Jameel, with a major UK and European BESS development pipeline. A JV partner with Harmony on Clay Tye; competes in the same BESS development market while also operating as a co-developer.
• Gore Street Energy Storage Fund: UK-listed fund that develops, owns, and operates utility-scale battery energy storage systems. Directly comparable to Harmony Energy in business model (BESS development + asset ownership) and target markets (primarily UK with European expansion), competing for the same projects and institutional capital.
• Statera Energy: UK-based developer of utility-scale battery energy storage projects with operational assets and a development pipeline. Directly comparable to Harmony Energy in BESS project development and ownership model.
• Arenko: UK-based battery energy storage developer and software provider with operational BESS sites. Directly comparable to Harmony Energy in utility-scale BESS development and grid services.
• TagEnergy: Global clean energy enterprise developing renewable energy and storage projects, including JV partnerships with Harmony Energy on Jamesfield and Chapel Farm. Directly competes in UK and European BESS development.
• Enso Energy: UK-based developer of utility-scale battery storage projects with operational assets and a growing pipeline. Directly comparable to Harmony Energy in BESS development approach and UK market focus.

Broad incumbents

• EDF Renewables: Major European renewable energy developer and a strategic acquirer of Harmony Energy's Polish BESS project. Operates broadly across wind, solar, and storage as part of the EDF Group, with deep European market access.
• RWE: Major German utility with significant European battery energy storage operations and a large development pipeline. Operates broadly across renewables with BESS as one segment, competing for grid-scale storage projects in Germany and broader Europe.
• Vattenfall: Swedish state-owned utility with utility-scale battery storage projects in the UK and Europe. Operates broadly across generation, distribution, and storage; directly comparable BESS activities in markets Harmony targets.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xtwitter.com/Harmony_Energy_
• YouTubeyoutube.com/channel/UCTKp2E3HCz_-0Dc4R_3Z6Hg
• LinkedInlinkedin.com/company/harmony-energy

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Subsidiaries3 records

Funding overview

Funding rounds1 record

Investors1 record

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 Harmony Energy