Field

What Field does

Field is a London-headquartered developer, owner, and operator of grid-scale battery energy storage systems (BESS), incorporated as Virmati Energy Ltd and trading as Field Energy. Founded in 2021, the company runs a fully integrated Develop-Build-Operate model covering site origination through long-term asset operation, with operational and in-construction projects across the UK, Italy, Germany, and Spain, and a development pipeline that has grown from an initial 4.5 GWh to roughly 11 GW including 1.6 GW qualified under Ofgem's long-duration storage scheme. Its operational portfolio includes the Oldham (20 MWh), Gerrards Cross (20 MWh), Newport (40 MWh), and Auchteraw (100 MWh) sites, with the 200 MW / 800 MWh Hartmoor project and three further 50 MW sites in construction. Field monetizes these assets through multiple stacked revenue streams: wholesale energy arbitrage, frequency response and dynamic containment services sold to system operators, UK capacity market payments, and where eligible, Ofgem's LDES cap-and-floor framework.

The company pairs its physical asset base with an in-house optimization platform called Gaia, which automates participation across intraday, wholesale, and balancing markets. Origin activities run through dedicated channels — direct landowner Option/Lease agreements, joint-development partnerships with other renewable developers, project acquisitions (notably the Holmston/Drum Farm transfer from RES and Hartmoor from Clearstone Energy), and direct relationships with TSOs/DSOs for grid connections. Capital access is institutional-grade: Field has raised over £250 million in equity across multiple rounds led by a £200 million commitment from DIF Capital Partners (DIF Infrastructure VII) in July 2023, supplemented by a £42 million senior non-recourse project loan from Rabobank and ING in May 2025. Customers of the grid-side services include the National Energy System Operator (NESO) and the wider UK electricity grid, with iterative product outcomes cited as over 3.9 million tonnes of CO2e displacement over the 20-year life of the operational portfolio.

The business is structured around a B2B, enterprise-field-sales motion: heavy project development cycles with landowners, regulators, and grid operators, executed by an organization of roughly 80-100 employees led by CEO Amit Gudka and a recently appointed CTO (Jochen Alt). Pricing is not publicly disclosed and is negotiated project-by-project given the bespoke nature of grid-scale storage development. The primary commercial risks are asset commissioning execution (most of the pipeline is not yet operational), concentration of UK grid-services revenue on NESO, regulatory exposure to Ofgem's evolving LDES and ancillary-services frameworks, and the working-capital intensity of moving an 11 GW pipeline through planning, grid-connection, and construction.

Name

Field

Legal name

Virmati Energy Ltd

Website

https://field.energy

Company type

Private

Founded year

2021

Operating status

Operating

Headcount range

51–100 employees

Short description

Field is a London-based developer, owner and operator of grid-scale battery energy storage systems serving electricity grid operators and wholesale markets across the UK, Italy, Germany, and Spain. It monetizes assets through energy arbitrage, frequency response, and capacity-market services.

Ownership category

akta.pro rank

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

BESS Operations, Maintenance & Asset Performance Management (APM) (EUAFAAAG), BESS EPC, Integration & Commissioning (EUAFAAAB), BESS Financing, Insurance & Contracting (Tax Equity, PPA/Tolling, Warranties) (EUAFAAAI)

Keywords

• Grid-scale battery storage
• Battery energy storage systems
• Renewable energy infrastructure
• Grid flexibility services
• Energy arbitrage trading

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices5 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Energy Arbitrage: Charging batteries when renewable energy output is high (low prices) and discharging during peak demand (high prices). Revenue generated from price differential in wholesale energy markets.
2. Frequency Response / Ancillary Services: Providing rapid response services to maintain grid frequency and stability. Includes dynamic containment and other frequency regulation services that replace traditional gas peaker plants.
3. Capacity Market / Grid Services: Revenue from capacity market auctions and providing balancing services to National Energy System Operator. Assets provide firm backup power during periods of lower renewable generation.
4. Long Duration Energy Storage (LDES) Cap-and-Floor: Revenue stabilization through Ofgem's LDES scheme cap-and-floor model for qualifying long-duration storage projects (8+ hours).
5. Asset Ownership and Operation: Field develops, builds, owns and operates battery storage assets. Revenue derived from full asset lifecycle including construction, operation, and optimization.

Go-to-market motion1 record

Distribution channels4 records

Marketing channels5 records

Core offering

Field develops, builds, owns, and operates grid-scale battery energy storage systems (BESS) across the UK and Europe, monetizing the assets by trading on wholesale, intraday, and balancing energy markets and providing frequency response and grid stability services. The company runs a proprietary in-house optimization platform (Gaia) that automates battery dispatch and asset management. Field also develops long-duration energy storage (LDES) projects under Ofgem's cap-and-floor framework.

Product overview

Field is a vertically integrated battery energy storage infrastructure company that develops, builds, and operates grid-scale battery energy storage systems (BESS) across the UK and Europe. The company operates a portfolio of battery storage projects including operational sites (Oldham 20 MWh, Newport 40 MWh, Gerrards Cross 20 MWh, Auchteraw 100 MWh) and projects in construction (Hartmoor 800 MWh, Whitebirk 50 MWh, Holmston 100 MWh, Drum Farm 100 MWh). Field's technology stack includes Gaia, an in-house flexibility platform that automates asset optimization in wholesale and balancing markets. The company has approximately 4.5 GWh in development pipeline and operates across the UK, Italy, Germany, and Spain.

Differentiator

Problem solved

Functional benefit

Brands

• Gaia: Field's in-house flexibility platform for optimising battery storage deployment, automating participation in intraday, wholesale and balancing markets.

Products and services

• Grid-Scale Battery Energy Storage Systems (BESS) Vertically integrated develop-build-own-operate (DBO) service for grid-scale battery storage assets in the UK and Europe. Field identifies sites, secures landowner agreements and planning consent, finances construction, builds the battery storage installation, owns the asset, and operates it across its lifecycle to provide grid balancing, frequency response, constraint cost reduction, and energy arbitrage. Customers/partners include landowners, developers, grid operators (NESO and TSOs/DSOs), and institutional investors. Operational portfolio: Oldham (20 MWh), Newport (40 MWh), Gerrards Cross (20 MWh), Auchteraw (100 MWh); pipeline 11 GW.
• Gaia Flexibility Platform Proprietary in-house software platform that automatically optimizes battery storage asset dispatch across intraday, wholesale, and balancing markets to maximize performance and revenue. First launched at the Oldham site in December 2024 and now used across Field's portfolio including the three projects financed by the Rabobank/ING loan. Provides automated market participation and asset management for grid-scale battery storage.
• Long Duration Energy Storage (LDES) Projects Long-duration energy storage projects qualifying under Ofgem's LDES cap-and-floor scheme (8+ hour storage duration). Field has five LDES sites totaling 1.6 GW that have progressed to Stage 2 under the Ofgem scheme, providing regulated revenue stabilization for long-duration battery storage deployment.

Quantifiable outcome

• 3,900,000 tonnes of CO2e avoided over 20-year operational period for 672 MWh operational portfolio by March 2026
• +5 more outcomes

Named customers2 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• PowersystemscoreImplementation/ SI/ Consulting Partner · 8 July 2025Construction partner delivering Field Holmston project in South Ayrshire. Powersystems responsible for electrical systems installation.
• Clarke EnergycoreImplementation/ SI/ Consulting Partner · 8 July 2025Construction partner delivering Field Drum Farm project near Keith, Scotland.
• Envision EnergycoreOthers · 8 July 2025Battery storage system supplier appointed for both Holmston and Drum Farm projects.
• Clearstone EnergycoreOthers · 18 November 2024Acquisition of 200 MW / 800 MWh Hartmoor battery storage project from Clearstone Energy. NESO worked with Clearstone to accelerate energisation date from 2033 to 2026.
• RES (Renewable Energy Systems)coreOthers · 23 January 2024Acquisition of Holmston and Drum Farm energy storage systems from RES, adding 200 MWh to Field's pipeline. First-time partnership between Field and RES for project transfer.
• RJ McLeod (OCU Group)minorImplementation/ SI/ Consulting PartnerEngineering and infrastructure works contractor for Auchteraw battery site, delivered prior to OCU Group acquisition.
• Natural PowerminorOthersProvided technical due diligence services to DIF Capital Partners for the £200m investment in Field.

Scale indicators11 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• Harmony Energy: UK-based developer, owner and operator of grid-scale battery energy storage assets, with operational projects competing directly against Field's sites in the Balancing Mechanism and ancillary services markets.
• Low Carbon: UK renewables and battery storage developer/owner-operator developing a multi-GW European BESS pipeline, comparable in geographic scope and project size to Field's 11 GW.
• Zenobe Energy: Vertically integrated developer and operator of grid-scale BESS and EV fleet infrastructure in the UK, with similar DBO economics and a multi-hundred-MWh pipeline competing in the same dynamic containment and capacity market auctions.
• Arenko: UK-based BESS developer and software-driven optimiser building vertically integrated storage assets, with a focus on trading and asset management platforms analogous to Field's Gaia.
• Anesco: UK-based renewable energy and battery storage developer/operator with operational BESS assets selling into the same wholesale and ancillary service markets as Field.
• Penso Power: UK grid-scale battery storage developer and operator backed by energy majors, competing with Field in the Balancing Mechanism and capacity market while developing multi-hundred-MWh projects.
• TagEnergy: International renewable and BESS developer with significant UK operations (including one of Europe's largest operational BESS projects), competing head-to-head with Field for grid connections and ancillary service contracts.

Broad incumbents

• Quinbrook Infrastructure Partners: Infrastructure investment firm backing a large UK and European BESS storage portfolio (e.g., through Habitat Energy and Connected Energy), operating in the same value chain as Field but from the capital-deployment side.
• Statkraft: Europe's largest renewable energy generator with a growing grid-scale BESS portfolio across the UK and continental markets; competes with Field in wholesale optimisation and ancillary services.

Others

• Alfen: Dutch provider of energy storage systems and grid equipment supplying BESS integrators across Europe; comparable as an adjacent hardware/infrastructure participant in the same value chain as Field's battery storage projects.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights6 records

Customer concentration

• Xx.com/field__energy
• LinkedInlinkedin.com/company/field-energy

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Funding overview

Funding rounds4 records

Investors5 records

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 Field