What Invinity Energy Systems Plc does

Invinity Energy Systems Plc is a UK-headquartered, AIM-listed (ticker: IES) manufacturer of vanadium flow battery (VFB) energy storage systems for utility-scale and commercial/industrial customers. The company's core technology stores electrical energy in a water-based vanadium electrolyte held in external tanks, decoupled from the fuel cell stack where charging and discharging occur — enabling independent scaling of power (MW) and energy (MWh). Current-generation products include Endurium (utility-scale, 3-100+ MW, 4-18+ hours duration) and Endurium Enterprise (C&I, 1-20 MW), succeeding the earlier VS3 platform, with a next-generation product (Mistral) under development.

The company's revenue model is primarily project-based capital equipment sales of battery hardware to utilities, developers, C&I operators, government agencies, and tribal enterprises, supplemented by project-specific government grants and ongoing services/support. Distribution combines direct enterprise sales in core geographies (UK, US, Canada) with a network of channel partners and resellers in Taiwan (Everdura), India (Atri Energy Transition), and Australia (VSUN Energy). Manufacturing operates from Scotland (Motherwell/Bathgate), Vancouver, BC (hundreds of MWh capacity), and a planned California facility targeting >1 GWh annually to satisfy US domestic content requirements. Invinity has deployed systems across nearly 100 sites in 17+ countries, accumulating over 8 GWh of total energy discharged since 2022 with zero capacity degradation.

Financially, Invinity is pre-profitability with 2025 revenue and grant income expected at approximately £17 million and 2026 guidance reduced to £13 million due to project timing. Cumulative funding includes US$33.46 million raised in November 2021, £21.5 million in February 2023, and a £25 million strategic investment from the UK's National Wealth Fund (the largest shareholder) in 2024. The order book entering 2026 stood at £17 million, anchored by flagship projects including the 1.5 GW/2.1 GWh FlexBase Swiss data centre battery, a 32 MWh Pacific Steel Group California steel mill installation, a 12 MWh PNNL deployment, and 20 MWh orders for Hungary.

Name

Invinity Energy Systems Plc

Legal name

Invinity Energy Systems plc

Website

https://invinity.com

Company type

Public

Founded year

2014

Operating status

Operating

Headcount range

101–250 employees

Short description

Invinity Energy Systems Plc is a UK-listed vanadium flow battery manufacturer selling utility-scale and commercial energy storage systems (Endurium, Endurium Enterprise) to utilities, developers, governments, and C&I customers across 17+ countries.

Ownership category

akta.pro rank

Product category

Grid-Scale Battery Energy Storage Systems

NAICS

Battery Manufacturing (33591)

SIC

Motors & Generators (3621)

akta.pro primary industry

Electrochemical LDES (Flow Batteries & Other Long-Duration Batteries) (EUAFADAA)

akta.pro secondary industries

Battery Modules & Packs (Industrial/Commercial pack assembly) (IMAGAHAB), Battery Recycling, Decommissioning & End-of-Life Services (EUAEAEAN)

Keywords

• Vanadium flow batteries
• Grid-scale energy storage
• Long-duration storage
• Commercial industrial batteries
• Renewable energy storage

Headquarters

HQ city

St. Helier

Offices4 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Vanadium Flow Battery Hardware Sales: Invinity designs, manufactures, and sells vanadium flow battery systems (Endurium, Endurium Enterprise, VS3) as capital equipment to utilities, developers, C&I customers, and government/institutional buyers. Revenue is recognized upon delivery and commissioning of battery systems. Project sizes range from 1 MWh to multi-GWh, with deliveries spanning multiple years for large projects.
2. Project Grant and Government Funding: Invinity participates in government-funded energy storage programs and receives grant funding tied to specific projects, such as the California Energy Commission's LDES Program (e.g., $14 million grant for the Pacific Steel Group 32 MWh project), DESNZ's LDES competition (up to £10 million for Copwood), and B.C. Centre for Innovation and Clean Energy (CAD $0.5m for Mistral pilot). These grants are project-specific and non-recurring.
3. Services and Support: Invinity provides ongoing technical support, training, and operational engagement for customers throughout the asset life. The company also offers digital tools and responsive lifetime support backed by regional teams in the UK, USA, and Canada.

Go-to-market motion3 records

Distribution channels5 records

Marketing channels6 records

Core offering

Invinity designs, manufactures and sells modular vanadium flow battery (VFB) energy storage systems as a non-lithium alternative to conventional batteries. Its Endurium and Endurium Enterprise platforms are factory-built, turn-key systems that deliver long-duration (4–18+ hours) storage scaled from 1 MW to 100+ MW for utilities, commercial & industrial customers, data centres, and off-grid microgrids, with a 30+ year operating life and no capacity degradation.

Product overview

Invinity Energy Systems is a vanadium flow battery (VFB) manufacturer offering modular, factory-built energy storage systems as a non-lithium alternative to conventional battery technology. The company's product portfolio centers on two current-generation platforms: Endurium (for utility-scale applications scaling 3-100+ MW with 4-18+ hour discharge) and Endurium Enterprise (for commercial & industrial customers at 1-20 MW scale). The Endurium family succeeds the earlier VS3 product line. A next-generation product code-named Mistral is under development with enhanced specifications. All products share core VFB technology characteristics: unlimited cycling without degradation, non-flammable water-based electrolyte, and 30+ year operational lifespan.

Differentiator

Problem solved

Functional benefit

Brands

• Endurium: Next-generation, modular vanadium flow battery optimized for large-scale, long-duration projects; engineered to scale from 3 to 100+ MW and operate 4-18+ hours without cycle limits.
• Endurium Enterprise
• Mistral
• VS3

Products and services

• Endurium Modular, factory-built vanadium flow battery system designed for utility-scale, long-duration energy storage projects ranging from 3 MW to 100+ MW with 4–18+ hours of discharge, offering unlimited cycling, zero fire risk, and a 30+ year operational life for utilities, developers and government customers.
• Endurium Enterprise Vanadium flow battery product tailored for Commercial & Industrial customers requiring 1–20 MW of safe, cost-effective, long-duration energy storage to integrate onsite renewables, manage demand charges and optimise tariffs.
• VS3 Previous-generation modular vanadium flow battery system deployed by Invinity in multiple reference projects, including the 5 MWh Energy Superhub Oxford and the 10 MWh Viejas Casino & Resort microgrid, now superseded by the Endurium platform.
• Mistral Next-generation vanadium flow battery product code-named Mistral, offering improved performance, scalability and economics over previous generations, with initial 14.4 MWh customer order for grid services in Taiwan and CICE-supported prototype in Vancouver.

Quantifiable outcome

• Over 8,000 MWh (8 GWh) of total energy discharged since 2022, with zero capacity degradation across nearly 100 sites globally
• +6 more outcomes

Named customers14 records

Segments6 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

14 partnerships are on record, tiered core and minor.

• Elemental EnergycoreStrategic or Co-development PartnerElemental Energy developed the Chappice Lake Solar & Storage Project in Alberta, Canada — Canada's largest flow battery installation (8.4 MWh). Elemental co-owns the project with Cold Lake First Nations. The project demonstrates VFBs integrated with 21 MWp solar in extreme weather conditions.
• Indian EnergycoreImplementation/ SI/ Consulting PartnerIndian Energy is Invinity's project development partner for US tribal and C&I microgrid projects. It developed the Viejas Casino & Resort microgrid (10 MWh VFB, $31 million CEC grant) and the Bad River Band Project VITALITY (2 MWh VFB, $3.36 million DOE grant). Indian Energy assists with project development, grant applications, and system integration.
• Habitat EnergycoreStrategic or Co-development PartnerHabitat Energy is an energy optimisation and trading platform for renewable and grid-scale battery storage assets. It dispatches Invinity's VFBs on UK, European, and Australian energy markets, maximising revenue from energy arbitrage, FCAS, and other ancillary services. Habitat has worked on projects including Energy Superhub Oxford and Yadlamalka, Australia.
• Orbital Marine PowerminorStrategic or Co-development PartnerOrbital Marine Power's O2 tidal turbine was integrated alongside Invinity's 1.8 MWh VFB and ITM Power's 670 kW electrolyser at EMEC's Eday island facility. This world-first 3-in-1 demonstration (tidal + VFB + hydrogen) was part of the EU-funded ITEG project.
• ITM PowerminorStrategic or Co-development PartnerITM Power's 670 kW electrolyser was integrated alongside Invinity's VFB and Orbital Marine Power's tidal turbine at EMEC's Eday facility as part of the ITEG project, demonstrating green hydrogen production powered by tidal energy with VFB storage smoothing variable generation.
• FlexBasecoreStrategic or Co-development PartnerSwiss developer FlexBase contracted Invinity to design a 1.5 GW / 2.1 GWh vanadium flow battery system for the Technology Centre Laufenburg, near the Star of Laufenburg substation connecting Switzerland, Germany, and France. This is the largest VRFB system under development globally, linked to a 500 MW AI data centre complex. The project received construction approval for an 800 MW first phase in January. Expected operational by 2029.
• Everdura Technology CompanycoreChannel Partner/ Reseller/ DistributorEverdura is Invinity's exclusive reseller in Taiwan and certain South-East Asian markets under a three-year agreement targeting 255 MWh of sales. Everdura has placed orders including a 15 MWh initial order and a 14.4 MWh Mistral order. In February 2024, Everdura entered an agreement to manufacture Invinity's Mistral product in Taiwan for Taiwanese and South-East Asian markets. Everdura's parent company, Everbrite, made a £2.5m strategic investment in Invinity in 2023.
• VSUN Energy / Australian Vanadium LtdcoreChannel Partner/ Reseller/ DistributorVSUN Energy (wholly owned by Australian Vanadium Ltd) is Invinity's partner for Australian market development. VSUN procured the VS3 battery for the Horizon Power Kununurra microgrid project in Western Australia, demonstrating VFB reliability in remote, high-temperature environments. VSUN promotes Invinity's products across the Australian market.
• Pivot Power (EDF Renewables)coreImplementation/ SI/ Consulting PartnerPivot Power, part of EDF Renewables, led the Energy Superhub Oxford project — a £41 million world-first hybrid energy storage project incorporating Invinity's 5 MWh VFB alongside 50 MWh lithium-ion battery. Invinity's VFB 'front-ends' the hybrid system, performing much of the heavy-lifting to reduce wear on the lithium-ion battery.
• Bei Ying International CorporationminorChannel Partner/ Reseller/ DistributorBei Ying is a Taiwanese industrial equipment wholesaler and Invinity reseller in Taiwan. It purchased an initial 2.2 MWh (10 VS3 batteries) for resale to end-users including an industrial technology research institute and commercial/industrial electricity users in Taiwan.
• Pacific Northwest National Laboratory (PNNL)coreStrategic or Co-development PartnerPNNL is deploying a 12 MWh Endurium vanadium flow battery for advanced energy storage demonstrations at its Grid Storage Launchpad facility in Washington State. Funded by the US Department of Energy. Invinity's battery is the first to approach the 100-kW testing limit at the facility, which serves as the nation's proving ground for grid-scale storage.
• muGrid AnalyticsminorImplementation/ SI/ Consulting PartnermuGrid Analytics leads Project VITALITY — a US Department of Energy-funded initiative in Wisconsin deploying a 2 MWh Invinity Endurium Enterprise battery at the Bad River Band of Lake Superior Chippewa tribal facility in Ashland, Wisconsin. muGrid Analytics coordinates the $4.7 million grant and project execution.
• Atri Energy TransitioncoreChannel Partner/ Reseller/ DistributorAtri Energy Transition is Invinity's strategic partner for the Indian energy storage market, entered in September 2025. Atri provides local sales support and will coordinate regional manufacturing for the Indian market, supporting Invinity's entry into India with vanadium flow batteries for standalone, solar/wind + storage, and C&I projects.
• Aniron / Rivington EnergyminorStrategic or Co-development PartnerAniron and Rivington Energy are partners in the Copwood VFB Energy Hub project in East Sussex, UK. Aniron is associated with the project's development alongside Invinity's battery deployment at the 20.7 MWh site.

Scale indicators10 records

Recent moves10 records

Expansion highlights7 records

Direct peers

• Largo Clean Energy: Subsidiary of Largo Inc., combining vanadium resource ownership with VFB product development (Largo Physical Vanadium and EnerVan). Vertically integrated like Invinity's partner ecosystem and competing head-to-head in utility-scale VRFB deployments.
• VRB Energy: VRFB manufacturer with operations in China and Canada, focused on utility-scale and microgrid storage. Closely comparable to Invinity on chemistry (vanadium flow), target market (grid-scale renewables integration), and modular product architecture.
• Sumitomo Electric Industries: Japanese conglomerate with a long-standing vanadium redox flow battery business targeting utility-scale stationary storage. Directly competes with Invinity in the global VRFB market and is among the most established flow-battery manufacturers.
• Enerox (CellCube): Austrian-headquartered vanadium flow battery manufacturer offering containerised VFB systems for commercial, industrial, and utility applications. Directly comparable in chemistry, modular turn-key approach, and target customer segments.
• ESS Inc. US-listed manufacturer of iron flow batteries for long-duration stationary storage. Closely comparable as a non-lithium flow battery specialist pursuing the same LDES market with a similar no-degradation / unlimited-cycling value proposition.

Emerging players

• Energy Vault: Public-listed LDES developer using gravity-based and hybrid storage architectures. Targets the same long-duration stationary storage opportunity as Invinity, with differentiated technology but overlapping customer base.
• Form Energy: US-based developer of iron-air battery technology targeting 100+ hour long-duration storage. Competes with Invinity for the same LDES customer wallet share, though with different chemistry and longer-duration positioning.
• Highview Power: UK-based liquid air energy storage (LAES) developer with operational projects. Targets the same long-duration storage market as Invinity in UK and global utility markets, offering a competing non-lithium technology pathway.

Broad incumbents

• Tesla (Megapack / Energy Storage): Tesla Energy's Megapack business dominates grid-scale lithium-ion storage deployments globally. Competes head-to-head with Invinity for utility-scale storage RFPs, primarily in shorter-duration (≤4 hour) applications.
• Fluence Energy: Global leader in grid-scale lithium-ion battery energy storage with a broad product portfolio (Gridstack, Sunstack, etc.). Competes with Invinity for utility-scale storage contracts but does not offer the non-flammable, long-life VFB differentiation.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• Xx.com/InvinityEnergy
• LinkedInlinkedin.com/company/invinity-energy-systems

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Subsidiaries2 records

Funding overview

Funding rounds13 records

Investors8 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 Invinity Energy Systems Plc