Redox One
Redox One manufactures Iron-Chromium Redox Flow Batteries for utility-scale and industrial long-duration energy storage, leveraging proprietary direct-from-ore electrolyte production and vertical integration with parent mining group Tharisa.
- Company typePrivate
- Founded2022
- HeadquartersPaphos, Cyprus
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What Redox One does
Redox One is a private Cyprus-domiciled energy storage company that designs, manufactures, and commercializes Iron-Chromium Redox Flow Batteries (Fe-Cr RFBs) for long-duration energy storage (LDES) at grid and industrial scale. The company's core product is an aqueous Fe-Cr flow battery system that stores energy through galvanic reactions of iron and chromium ions dissolved in a non-flammable electrolyte, offering 4-12+ hour discharge durations, independent scaling of power and energy, deep discharge without degradation, and a recyclable, reusable electrolyte. Differentiated technical features include mixed-species electrolytes that eliminate net crossover losses, microporous separators replacing costly fluorinated membranes, an active tank-balancing system, and purity controls that reduce hydrogen evolution by roughly 100x relative to earlier Fe-Cr systems. The stack architecture is paired with a proprietary direct-from-chromite-ore electrolyte production process co-located with the Tharisa Mine in South Africa's Bushveld Complex and operated via sister company Arxo Metals.
Redox One firmographics
Firmographics- Name
- Redox One
- Legal name
- Redox One
- Website
- https://redoxone.com
- Company type
- Private
- Founded year
- 2022
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Redox One manufactures Iron-Chromium Redox Flow Batteries for utility-scale and industrial long-duration energy storage, leveraging proprietary direct-from-ore electrolyte production and vertical integration with parent mining group Tharisa.
- Ownership category
- akta.pro rank
Redox One industry classification
Industry- Product category
- Long Duration Energy Storage
- NAICS
- Battery Manufacturing (33591), Battery Manufacturing (335910)
- SIC
- Electronic Coils, Transformers & Other Inductors (3677)
- akta.pro primary industry
- Electrochemical LDES (Flow Batteries & Other Long-Duration Batteries) (EUAFADAA)
- akta.pro secondary industries
- Battery Cells (Li-ion, LFP, Sodium-ion, Lead-acid, NiMH) (IMAGAHAA), Battery Modules & Packs (Industrial/Commercial pack assembly) (IMAGAHAB), Battery Materials Refining & Re-Manufacturing Feedstocks (Li, Ni, Co, Mn, Graphite Salts) (EUAIAIAJ)
Keywords
Where Redox One is headquartered
LocationHeadquarters
- HQ city
- Paphos
- HQ country
- Cyprus
- HQ region
- Europe
Offices3 records
Markets served
Redox One business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Technology or R&D, Supply Chain, Personnel, Marketing or Sales, Infrastructure, Operations
Revenue model
- Iron-Chromium Flow Battery Systems: Sale of complete flow battery systems for utility-scale and industrial long-duration energy storage applications. Revenue derived from hardware sales, installation, and potentially ongoing maintenance contracts.
- Electrolyte Supply: Supply of Iron-Chromium electrolyte solutions, leveraging proprietary production process and multi-generational raw material access through Tharisa. Electrolyte serves as a reusable, long-lived asset.
Go-to-market motion2 records
Distribution channels2 records
Marketing channels5 records
Redox One product offering
Product offeringCore offering
Redox One manufactures Iron-Chromium Redox Flow Battery (Fe-Cr RFB) systems for long-duration energy storage (LDES). The company produces complete battery systems using proprietary electrolyte manufactured directly from chromite ore sourced through parent company Tharisa, delivering 4-12+ hour discharge solutions for utility-scale, industrial microgrid, and renewable integration applications.
Product overview
Redox One offers a single unified product: the Iron-Chromium Redox Flow Battery (Fe-Cr RFB) system, representing a complete mine-to-megawatt solution. The technology stores energy by changing the charge state of iron and chromium ions in electrolyte tanks pumped through a cell stack. This integrated offering combines proprietary electrolyte production directly from chromite ore (mined by parent company Tharisa Minerals in South Africa) with the battery system itself, enabling long-duration energy storage for grid-scale, industrial microgrid, and renewable integration applications.
Differentiator
Problem solved
Functional benefit
Products and services
- Iron-Chromium Redox Flow Battery (Fe-Cr RFB) System Long Duration Energy Storage (LDES) battery system using iron and chromium dissolved in aqueous electrolyte to store and discharge energy through galvanic reactions. Features independent scaling of power and energy, non-flammable operation, 100% recyclable components, and virtually unlimited cycle and calendar life. Designed for utility-scale, industrial microgrid, and renewable integration applications with 4-12+ hour discharge durations.
Quantifiable outcome
- Electrolyte production cost reduction of up to 80%
- +2 more outcomes
Companies that use Redox One
Customer profileSegments3 records
Ideal customer profiles3 records
Redox One technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
Redox One partnerships and signals
Strategic signalPartnerships
Seven partnerships are on record, tiered core, major and minor.
- Arxo MetalscoreSister company processing chromite ore into Iron-Chromium electrolyte within kilometres of the mine source. Enables proprietary sustainable conversion process.
- METQmajorIndustrialisation partner chosen to scale-up proprietary electrolyte production process. Founded 1979, market leader in particle sizing and gravity concentration of minerals. Products designed and manufactured in-house.
- TTPmajorTechnology partner founded 1987, collaborating to bring novel iron chromium battery system to market. Leveraging experience in systems engineering, commercial product development, and electrochemistry.
- Chariot Transitional EnergymajorSystem integration partner supporting deployment of flow battery solutions.
- Flow Batteries Europe (FBE)minorLeading member with CEO on executive board, VP Business Development on Business Development Committee, Head of Systems on Technical Committee. Shapes EU legal framework and R&D priorities for flow batteries.
- LDES CouncilminorGlobal CEO-led organization accelerating LDES development and deployment. Redox One member supporting industry collaboration and policy frameworks.
- IRENAminorInternational Renewable Energy Agency partnership supporting global energy transformation and providing data/analyses on renewable energy technologies.
Scale indicators6 records
Recent moves7 records
Expansion highlights6 records
Redox One competitors and assessment
Company assessmentDirect peers
- Invinity Energy Systems: Invinity is a leading commercial-stage vanadium redox flow battery manufacturer focused on utility-scale and commercial LDES applications. It is the most direct competitor to Redox One in the flow battery LDES category, targeting similar utilities, microgrids, and renewable integration customers with a comparable product proposition.
- Sumitomo Electric Industries: Sumitomo Electric is a long-established industrial conglomerate with one of the largest commercial deployments of vanadium redox flow batteries worldwide, including multi-MW installations for utilities. It is a comparable flow battery peer with deep manufacturing and a track record of large utility projects.
- ESS Inc. ESS Inc. manufactures iron flow batteries using an iron-only chemistry for long-duration storage. While its chemistry differs from Redox One's Fe-Cr, it targets the same LDES market with a similar value proposition of using earth-abundant, safe, non-flammable materials for 4-12+ hour storage at grid and commercial scale.
- Volterion: Volterion is a German vanadium flow battery company where Redox One's CEO Thomas Gebauer previously served as Co-Founder and Co-CEO and achieved an exit. It is a directly comparable peer in flow battery technology with similar European market focus and enterprise sales motion.
- Largo Clean Energy (Largo Inc.): Largo Clean Energy is the energy storage arm of Largo Inc., a vertically integrated vanadium producer pursuing vanadium redox flow battery systems. Its vertical integration parallels Redox One's mine-to-system model, making it a particularly apt peer for cost and supply chain comparison.
- CellCube Energy Storage Systems (Enerox GmbH): CellCube/Enerox produces vanadium redox flow battery systems for grid-scale and commercial energy storage globally. It directly competes with Redox One in the long-duration flow battery segment, particularly in European and African markets where Redox One is establishing its presence.
Broad incumbents
- Form Energy: Form Energy develops iron-air battery systems targeting 100+ hour LDES applications for the U.S. grid. While it uses a different chemistry, it competes in the same LDES procurement landscape and represents a well-capitalised alternative that utilities may choose over flow batteries.
- Energy Vault: Energy Vault offers gravity-based and hybrid LDES solutions and has commercial deployments with utilities globally. It is a competing LDES provider that competes for the same utility and industrial storage procurement dollars, although based on mechanical rather than electrochemical principles.
- Highview Power: Highview Power is developing liquid air energy storage (cryogenic) for grid-scale LDES. It is a competing LDES technology provider competing for the same utility procurement opportunities and policy support as Redox One, but with a different underlying physics-based approach.
Emerging players
- JenaBatteries: JenaBatteries is a German company developing organic redox flow batteries using polymer-based electrolytes. It is an emerging European flow battery peer that competes in similar German and EU markets with a comparable utility-scale LDES value proposition.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key highlights7 records
Customer concentration
Redox One social profiles
Digital presenceRedox One financial estimates
Financial estimateRevenue estimate
Valuation estimate
Redox One leadership team
Management profileNumber of profiles
Profiles6 records
Redox One funding detail
Funding detailFunding overview
Funding rounds2 records
Investors1 record
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Redox One M&A and investment
M&A and investmentM&A1 record
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Redox One
What does Redox One do?
Redox One manufactures Iron-Chromium Redox Flow Battery (Fe-Cr RFB) systems for long-duration energy storage (LDES). The company produces complete battery systems using proprietary electrolyte manufactured directly from chromite ore sourced through parent company Tharisa, delivering 4-12+ hour discharge solutions for utility-scale, industrial microgrid, and renewable integration applications.
Is Redox One a public or private company?
Redox One is a private company. It is classified as corporate owned and is currently operating.
When was Redox One founded?
Redox One was founded in 2022. It employs 11 to 50 people.
Where is Redox One based?
Redox One is headquartered in Paphos, Cyprus, in the Europe region.
How does Redox One make money?
Two revenue lines are on record. Iron-Chromium Flow Battery Systems are the primary driver. The others are electrolyte Supply.
Who are Redox One's main competitors?
Direct peers on record are Invinity Energy Systems, Sumitomo Electric Industries, ESS Inc., Volterion, Largo Clean Energy (Largo Inc.) and CellCube Energy Storage Systems (Enerox GmbH). Broad incumbents are Form Energy, Energy Vault and Highview Power. JenaBatteries is listed as an emerging player.
Does Redox One have an API?
No public API is recorded for Redox One.
What industry is Redox One in?
Redox One's product category is Long Duration Energy Storage. Its primary akta.pro industry code is EUAFADAA, Electrochemical LDES (Flow Batteries & Other Long-Duration Batteries), with a secondary code of IMAGAHAA, Battery Cells (Li-ion, LFP, Sodium-ion, Lead-acid, NiMH). Its NAICS code is 33591 and its SIC code is 3677.