Eelpower
Eelpower is a UK-based grid-scale battery energy storage developer that constructs, owns, and operates lithium-ion BESS assets providing frequency response, capacity market, and trading services to National Grid ESO and distribution network operators via institutional investor-backed joint ventures.
- Company typePrivate
- Founded2017
- HeadquartersLondon, United Kingdom
- Headcount11–50
- GTM typeB2B
- OfferingServices
What Eelpower does
Eelpower is a UK-based grid-scale battery energy storage system (BESS) developer and owner-operator, founded in 2017 by a team that had previously built the UK's first ground-mounted solar farm in 2010. The company constructs, owns, and operates lithium-ion battery storage assets ranging from 10MW to 50MW+ that provide grid balancing services to National Grid ESO and UK distribution network operators (WPD, UKPN, SSEN, SPEN). Headquartered in London with 11–50 employees, Eelpower has assembled one of the larger operating portfolios in the GB electricity storage market, with approximately 240MW energised or under construction as of late 2023 across four operational and three construction-stage sites.
The company's core technology centers on grid-scale lithium-ion BESS hardware from BYD and other manufacturers, orchestrated through its proprietary "Eel Dispatch Platform" developed in partnership with KrakenFlex (Octopus Energy Group). Eelpower pioneered battery co-location with solar generation in 2014 (Slepe Farm, Dorset) and with hydropower in 2017, creating hybrid configurations in which 60–70% of battery consumption is drawn from co-located renewables during grid services delivery. Its service portfolio encompasses the full suite of National Grid ESO frequency response products (Dynamic Containment, Regulation, and Moderation), T-4 Capacity Market participation, wholesale energy trading, and constraint management, with trading and optimization executed through long-dated route-to-market partnerships with EDF (Powershift, 7-year), Centrica (FlexPond, 7-year), and Habitat Energy (3-year).
Revenue is generated through multiple grid-services and energy-market streams, structured predominantly through joint ventures with institutional infrastructure investors. Eelpower has secured partnership capital commitments exceeding £800 million across SUSI Partners (150MW+ delivered), NextEnergy Solar Fund (two JVs totaling £300m for 865MW), Renewable Power Capital (1GW target, 240MW near-term pipeline), and most recently a £500m Eelpower Energy platform backed by Equitix, Aware Super, and the UK's National Wealth Fund. Under the August 2025 restructuring, Eelpower Limited holds a minority stake in Eelpower Energy while its management team transferred to the new platform, which targets over 1GW of new battery storage capacity and pursues opportunistic acquisitions from developers such as RES, evidenced by the May 2026 Stoneworthy (50MW/100MWh) purchase.
Eelpower firmographics
Firmographics- Name
- Eelpower
- Legal name
- Eelpower Limited
- Website
- https://eelpower.co.uk
- Company type
- Private
- Founded year
- 2017
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Eelpower is a UK-based grid-scale battery energy storage developer that constructs, owns, and operates lithium-ion BESS assets providing frequency response, capacity market, and trading services to National Grid ESO and distribution network operators via institutional investor-backed joint ventures.
- Ownership category
- akta.pro rank
Eelpower industry classification
Industry- Product category
- Grid-Scale Battery Energy Storage
- NAICS
- Electric Power Generation (22111)
- SIC
- Cogeneration Services & Small Power Producers (4991)
- akta.pro primary industry
- Utility-Scale BESS Project Development & Ownership (IPP/Developer) (EUAFAAAA)
- akta.pro secondary industries
- Energy Management Systems (EMS), SCADA & Dispatch/Optimization Software for Storage (EUAFAAAF), BESS Operations, Maintenance & Asset Performance Management (APM) (EUAFAAAG), BESS Financing, Insurance & Contracting (Tax Equity, PPA/Tolling, Warranties) (EUAFAAAI)
Keywords
Where Eelpower is headquartered
LocationHeadquarters
- HQ city
- London
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
Eelpower business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Supply Chain, Operations, Technology or R&D, Personnel, Infrastructure
Revenue model
- Grid Balancing Services: Eelpower owns and operates grid-scale batteries that provide frequency response and balancing services to National Grid ESO, including Dynamic Containment, Dynamic Regulation, and Dynamic Moderation services. Revenue is generated through contracts with the national grid operator for providing grid stability services.
- Capacity Market: Eelpower participates in T-4 Capacity Market auctions, securing 15-year contracts for capacity delivery. These contracts provide fixed revenue streams for making power available during peak demand periods.
- Energy Trading and Optimisation: Batteries are optimised through route-to-market partners (EDF, Centrica, Habitat Energy) for trading in wholesale markets, balancing mechanism, and ancillary services. Partners provide floor price guarantees with upside from market trading.
- Project Acquisition and Development: Eelpower acquires ready-to-build or operational battery storage projects from developers, then constructs, owns and operates them through joint venture structures with institutional investors.
Go-to-market motion2 records
Distribution channels3 records
Marketing channels3 records
Eelpower product offering
Product offeringCore offering
Eelpower constructs, owns and operates grid-scale battery energy storage systems (BESS) in the UK. The company delivers frequency response, dynamic containment, dynamic regulation, dynamic moderation, capacity market, and energy trading services to National Grid ESO and distribution network operators through its owned battery storage portfolio. Eelpower also develops and operates the proprietary Eel Dispatch platform for asset monitoring and optimisation.
Product overview
Eelpower is a pioneering UK energy storage company that constructs, owns, and operates grid-scale battery storage assets. The core offering is large-scale BESS (Battery Energy Storage Systems) providing grid balancing, frequency response, and flexibility services. Eelpower operates through multiple joint ventures (SUSI Partners, NextEnergy Solar Fund, Renewable Power Capital) and has launched Eelpower Energy, a £500m platform backed by Equitix/Aware Super/National Wealth Fund targeting 1GW+ capacity. Key supporting services include the proprietary Eel Dispatch platform for dispatch/monitoring, and dynamic frequency response services (Dynamic Containment, Regulation, and Moderation) for National Grid ESO.
Differentiator
Problem solved
Functional benefit
Products and services
- Grid-Scale Battery Storage Assets Grid-connected lithium-ion battery energy storage systems ranging from 10MW to 50MW+ capacity that deliver balancing, flexibility and grid stability services. Eelpower constructs, owns and operates these assets, with four operational sites and three in construction as of 2023.
- Dynamic Frequency Response Services Suite of National Grid ESO frequency response services including Dynamic Containment, Dynamic Regulation and Dynamic Moderation that Eelpower's battery assets deliver to support net zero electricity system operation.
- Capacity Market Services
Quantifiable outcome
- 97.5% availability over 5 years of operation at Leverton site
- +2 more outcomes
Companies that use Eelpower
Customer profileNamed customers7 records
Segments3 records
Ideal customer profiles3 records
Eelpower technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature2 records
Eelpower partnerships and signals
Strategic signalPartnerships
Ten partnerships are on record, tiered core and strategic.
- Renewable Power CapitalcoreJoint venture with RPC (pan-European renewable energy investment platform backed by CPP Investments) targeting 1GW of utility-scale storage capacity with near-term pipeline of 240MW. RPC's entry marks their battery storage market entry in Great Britain.
- Habitat Energycore3-year battery optimisation agreement covering two 50MW projects (Fordtown near Aberdeen and Halesworth in Suffolk) built as part of SUSI JV. Habitat manages schemes using Eelpower's Eel Dispatch platform. Fordtown provides grid services to SSEN and National Grid; Halesworth supports UKPN.
- NextEnergy Solar FundcoreTwo joint ventures: NPEP (£100m targeting 250MW) and NPEP2 (£200m with combined 865MW capacity). First JV acquired 50MW Fife project and 250MW East of England portfolio. Eelpower holds 30% stake with NESF owning 70%. JV provides framework for acquiring up to 500MW+ of battery storage opportunities.
- EDF Energy Tradingcore7-year optimisation contract with EDF to manage trading and optimisation of three batteries (80MW total) at Rock Farm, Winchester and Dunsinane. EDF uses Powershift platform for market access across ancillary services, balancing mechanism and wholesale optimisation with floor price guarantee.
- SUSI PartnerscoreJoint venture partnership for constructing and operating battery storage assets in the UK. SUSI acquired 40MW of Eelpower's existing assets and committed to new build projects including 50MW Dunsinane battery near Dundee, Scotland. The JV has delivered 150MW+ of storage capacity and represents SUSI's first investment in UK energy storage market.
- Centrica Business Solutionscore7-year contract for optimisation of Eelpower's 10MW Leverton asset using Centrica's FlexPond platform. Centrica takes multi-market optimisation approach from months ahead to real-time with fixed guaranteed return plus additional payments per battery cycle.
- BYDcoreBattery supplier relationship spanning 13+ years. Eelpower's first battery used BYD lithium-ion technology at Leverton. BYD provides vertical integration from raw material sourcing to battery production. Eelpower visited BYD's Nanning factory in 2023 as part of China battery tour.
- AnescostrategicEPC contractor that constructed Leverton, Rock Farm and other Eelpower batteries. Anesco is UK market leader in energy storage with revenue modelling capabilities. They provide O&M service through AnescoMeter for monitoring battery assets.
- National Grid ESOcorePrimary grid services customer for Eelpower's battery assets. National Grid ESO procures frequency response services (Dynamic Containment, Regulation, Moderation) and capacity market contracts from Eelpower's operational assets.
- Renewable Energy Systems (RES)strategicWorld's largest independent renewable energy company that sold the 50MW/100MWh Stoneworthy BESS project in Devon to Eelpower Energy. This was Eelpower's fourth asset acquisition since formation in September 2025, marking first transaction between the companies.
Scale indicators12 records
Recent moves8 records
Expansion highlights6 records
Eelpower competitors and assessment
Company assessmentDirect peers
- Harmony Energy: UK-based developer, owner and operator of utility-scale battery energy storage projects, with multi-GW pipeline and active BESS assets in Great Britain. Competes directly with Eelpower for grid-scale UK BESS opportunities and ancillary service revenue.
- Zenobe Energy: UK-headquartered battery storage developer and operator focused on grid-scale BESS and EV fleet electrification, with substantial operational UK assets. Directly comparable in targeting National Grid ESO services and DNOs.
- Gore Street Energy Storage Fund: London-listed investment fund investing in UK and international grid-scale battery storage projects. Operates a comparable portfolio of BESS assets providing ancillary services to National Grid ESO and competing in similar Capacity Market and Dynamic Response auctions.
- Gresham House Energy Storage Fund: UK-listed battery energy storage investment fund managed by Gresham House with operational UK BESS portfolio. Matthew Margot (now Eelpower's Head of Asset Management) previously led storage portfolio management at Gresham House, illustrating direct expertise overlap and competitive positioning.
- Field: UK battery energy storage developer/operator building utility-scale BESS across Great Britain. Competes with Eelpower in similar wholesale market trading, frequency response, and capacity market services.
- Statera Energy: UK-based developer of flexible generation and battery storage assets, including a multi-GW pipeline. Targets similar flexibility services and DNOs as Eelpower.
- Enso Energy: UK battery storage developer with operational and pipeline projects across Great Britain, providing grid balancing and frequency response services. Comparable BESS-only owner-operator model.
- Low Carbon: UK renewable energy developer with significant solar and battery storage portfolio including operational BESS assets supplying grid services. Overlaps with Eelpower's hybrid solar + storage co-location approach.
Broad incumbents
- Statkraft UK: European state-owned renewable energy major with UK BESS operations including large grid-scale batteries (e.g., at Keith, Ballyroddy). Larger incumbent with broader portfolio competing in ancillary service auctions and capacity markets.
Others
- Anesco: UK EPC contractor and O&M provider that built Leverton, Rock Farm and other Eelpower battery projects and provides ongoing asset monitoring via AnescoMeter. Adjacent ecosystem participant and counterparty rather than direct competitor, but a potential partner for similar developers.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Eelpower social profiles
Digital presenceEelpower financial estimates
Financial estimateRevenue estimate
Valuation estimate
Eelpower leadership team
Management profileNumber of profiles
Profiles1 record
Eelpower subsidiaries and ownership
Company hierarchySubsidiaries1 record
Eelpower funding detail
Funding detailFunding overview
Funding rounds2 records
Investors4 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Eelpower M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Eelpower
What does Eelpower do?
Eelpower constructs, owns and operates grid-scale battery energy storage systems (BESS) in the UK. The company delivers frequency response, dynamic containment, dynamic regulation, dynamic moderation, capacity market, and energy trading services to National Grid ESO and distribution network operators through its owned battery storage portfolio. Eelpower also develops and operates the proprietary Eel Dispatch platform for asset monitoring and optimisation.
Is Eelpower a public or private company?
Eelpower is a private company. It is classified as private equity controlled and is currently operating.
When was Eelpower founded?
Eelpower was founded in 2017. It employs 11 to 50 people.
Where is Eelpower based?
Eelpower is headquartered in London, United Kingdom, in the Europe region.
How does Eelpower make money?
Four revenue lines are on record. Grid Balancing Services are the primary driver. The others are capacity Market, energy Trading and Optimisation and project Acquisition and Development.
Who are Eelpower's main competitors?
Direct peers on record are Harmony Energy, Zenobe Energy, Gore Street Energy Storage Fund, Gresham House Energy Storage Fund, Field, Statera Energy, Enso Energy and Low Carbon. Statkraft UK is listed as a broad incumbent. Anesco is listed as an others.
Does Eelpower have an API?
No public API is recorded for Eelpower.
What industry is Eelpower in?
Eelpower's product category is Grid-Scale Battery Energy Storage. Its primary akta.pro industry code is EUAFAAAA, Utility-Scale BESS Project Development & Ownership (IPP/Developer), with a secondary code of EUAFAAAF, Energy Management Systems (EMS), SCADA & Dispatch/Optimization Software for Storage. Its NAICS code is 22111 and its SIC code is 4991.