Hydraredox
Hydraredox is a Spain-based hardware manufacturer of proprietary Vanadium Redox Flow Battery systems for stationary energy storage, serving renewable energy operators, industrial/commercial customers, and grid/utilities across Europe through direct sales and the ES Hydra joint venture.
- Company typePrivate
- Founded2015
- HeadquartersZaragoza, Spain
- Headcount1–10
- GTM typeB2B
- OfferingHardware or Manufacturing
What Hydraredox does
Hydraredox (legally HydraRedox Iberia S.L.) is a Spanish clean-energy hardware company headquartered in Cuarte de Huerva (Zaragoza), Spain, with an additional registered entity, HydraRedox Europe Ltd, in the United Kingdom. Founded in 2013 (firmographic data) or 2015 (company-timeline data — conflict noted), the company develops and manufactures Vanadium Redox Flow Battery (VRFB) energy storage systems based on a proprietary single-cell architecture in which each cell operates independently with electronic monitoring of voltage, electrolyte flow, state of charge, and current distribution. The system separates power (electrochemical cells, scalable 5 kW to 50 MW) from energy (electrolyte tanks, minutes to over 24 hours of storage), enabling custom configuration per project. Headline performance claims include 80–85% round-trip DC efficiency at rated load (up to 85–90% at lower loads), up to 95% current efficiency, ~30-year expected life with unlimited cycles, 100% depth of discharge, safe operation at atmospheric pressure and –20°C to +40°C, and 4× overcharge capability.
Hydraredox serves three vertical customer segments — renewable energy operators, industrial/commercial enterprises, and grid/utilities — and addresses the intermittency of solar and wind generation, peak-shaving, UPS-grade power quality, and ancillary services for renewable integration. Revenue streams consist of (1) custom hardware sales of VRFB systems, (2) turnkey engineering services (system design, construction, commissioning), and (3) vanadium electrolyte production sold in IBCs or other packaging. Pricing is bespoke and not publicly disclosed. Distribution is direct-to-enterprise with no resellers; go-to-market relies on direct sales, industry-association visibility (notably UNEF), and conference participation across Spain and the EU.
In February 2025 the company formed the ES Hydra joint venture with EcoSourcen, adding a second production facility in the Czech Republic alongside its existing Zaragoza plant (electrolyte production + cell assembly). ES Hydra claims the largest European production capacity for industrial and residential VRFB systems and markets an "ES Flow" product line. The company is privately held, has 1–10 employees per firmographic data, has received EU Horizon 2020, CDTI Neotec, and CDTI BrainEn grant funding, and discloses no revenue or external equity investment.
Hydraredox firmographics
Firmographics- Name
- Hydraredox
- Legal name
- HydraRedox Iberia, S.L.
- Website
- https://hydraredox.com
- Company type
- Private
- Founded year
- 2015
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Hydraredox is a Spain-based hardware manufacturer of proprietary Vanadium Redox Flow Battery systems for stationary energy storage, serving renewable energy operators, industrial/commercial customers, and grid/utilities across Europe through direct sales and the ES Hydra joint venture.
- Ownership category
- akta.pro rank
Hydraredox industry classification
Industry- Product category
- Stationary Energy Storage / Vanadium Redox Flow Batteries
- NAICS
- Battery Manufacturing (335910), Battery Manufacturing (33591)
- akta.pro primary industry
- Electrochemical LDES (Flow Batteries & Other Long-Duration Batteries) (EUAFADAA)
- akta.pro secondary industry
- Battery Pack Manufacturing & Module Assembly (EUAFABAI)
Keywords
Where Hydraredox is headquartered
LocationHeadquarters
- HQ city
- Zaragoza
- HQ country
- Spain
- HQ region
- Europe
Offices3 records
Markets served
Hydraredox business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Technology or R&D, Supply Chain, Operations, Personnel, Marketing or Sales, Infrastructure
Revenue model
- Vanadium Redox Flow Battery Systems: Sale of customized VRFB energy storage systems. The company provides tailor-made solutions optimizing the system for specific customer requirements, avoiding surplus capacity. Systems are sold as complete units with the power section (electrochemical cells) and energy section (electrolyte tanks).
- Turnkey Engineering Services: Comprehensive engineering services for design, construction, and commissioning of storage installations. HRI offers complete 'llave en mano' (turnkey) installation services for energy storage systems.
- Vanadium Electrolyte Production and Sales: HydraRedox operates a vanadium electrolyte production plant for the VRFB market. Electrolyte is packaged in IBCs (Intermediate Bulk Containers) or other packaging per request and quantity.
Go-to-market motion2 records
Distribution channels3 records
Marketing channels7 records
Hydraredox product offering
Product offeringCore offering
Hydraredox develops and manufactures Vanadium Redox Flow Battery (VRFB) systems for large-scale stationary energy storage, using a proprietary single-cell architecture with independently scalable power (5kW–50MW) and energy (minutes to >24 hours) sections, ~85% round-trip efficiency, ~30-year life, and ambient-condition safe operation. The company sells customized battery systems, in-house produced vanadium electrolyte packaged in IBCs, and turnkey engineering services (design, construction, commissioning) directly to renewable energy operators, industrial/commercial customers, and grid/utilities, with European production via its ES Hydra joint venture.
Product overview
HydraRedox develops a proprietary vanadium redox flow battery technology for stationary energy storage in the renewable sector. The core offering consists of the HydraRedox battery system with independently scalable power (5kW-50MW) and energy (minutes to 24+ hours) sections. The company also produces vanadium electrolyte at its own production facility. In February 2025, HydraRedox formed a joint venture called ES Hydra with EcoSourcen to lead European production of Vanadium Redox Flow batteries for industrial and residential use, with manufacturing in Czech Republic and Spain.
Differentiator
Problem solved
Functional benefit
Products and services
- HydraRedox Vanadium Redox Flow Battery System Proprietary Vanadium Redox Flow Battery system for large-scale stationary energy storage, featuring independently scalable power (5kW–50MW) and energy (minutes to >24 hours) sections, ~85% round-trip efficiency, ~30-year expected life, and 100% depth of discharge. Designed for renewable energy operators, industrial/commercial customers, and grid/utilities seeking long-duration, safe, and recyclable storage.
- Vanadium Electrolyte Vanadium electrolyte produced at Hydraredox Iberia's in-house production plant for the VRFB market, packaged in Intermediate Bulk Containers (IBCs) or custom packaging by quantity, and fully reusable/recyclable at end of life with vanadium recovery. Sold to VRFB system integrators and operators requiring a reliable, high-purity electrolyte supply.
- Turnkey Engineering Services Comprehensive turnkey ('llave en mano') engineering services covering the design, construction, and commissioning of Vanadium Redox Flow Battery energy storage installations. Offered to enterprise customers to ensure tailored technical and economic fit for each deployment.
- ES Flow Battery (ES Hydra Joint Venture Product) Vanadium Redox Flow battery product line from the ES Hydra joint venture between HydraRedox and EcoSourcen, offering 100% European-produced flow batteries with production in Spain and the Czech Republic, targeting industrial and residential energy storage applications at reduced cost and faster delivery.
Quantifiable outcome
- 85% round trip efficiency (80-85% at rated load, 85-90% at lower loads)
- +5 more outcomes
Companies that use Hydraredox
Customer profileNamed customers1 record
Segments3 records
Ideal customer profiles3 records
Hydraredox technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature6 records
Hydraredox partnerships and signals
Strategic signalPartnerships
Four partnerships are on record, tiered core, strategic and minor.
- EcoSourcencoreJoint venture 'ES Hydra' formed in February 2025 between HydraRedox Iberia and EcoSourcen to lead vanadium redox flow battery production in Europe. The joint venture operates production plants in the Czech Republic and Spain, becoming the actor with the greatest production capacity for industrial and residential vanadium flow batteries in all of Europe. This collaboration reduces delivery times and optimizes deployment of energy solutions in the context of accelerated ecological transition.
- BrainEn Consortium (SISTEM, ORMAZABAL CORPORATE TECHNOLOGY, ORMAZABAL ELECTRIC, AMPACIMON, CPS, FORTIA ENERGIA, ENERCLIC)strategicThe BrainEn project (Experimental Research in Innovative Technologies for an Efficient and Sustainable Energy Community) is a consortium project approved by CDTI and Ministry of Science and Innovation. The consortium includes companies with recognized prestige and high technological development: SISTEM, HYDRAREDOX, ORMAZABAL CORPORATE TECHNOLOGY, ORMAZABAL ELECTRIC, AMPACIMON, CPS, FORTIA ENERGIA, and ENERCLIC. The project aims to implement clean, efficient, and secure energy throughout the entire energy chain from generation to consumption through scientific and technological innovations.
- INERCOcoreHydraRedox and INERCO established a collaboration agreement to offer flow battery energy storage solutions for industry and the power sector. The partnership combines HydraRedox's VRFB technology with INERCO's expertise in energy sector services.
- UNEF (Unión Española Fotovoltaica)minorHydraRedox is a member of UNEF (Unión Española Fotovoltaica - Spanish Photovoltaic Union). They have participated in UNEF forums and GENERA exhibition events. UNEF is the Spanish solar photovoltaic industry association.
Scale indicators3 records
Recent moves6 records
Expansion highlights5 records
Hydraredox competitors and assessment
Company assessmentBroad incumbents
- ABB: Global industrial and grid technology supplier with energy storage systems and power-conversion hardware used in flow-battery deployments; competes as a broad incumbent in HydraRedox's grid/C&I segments.
- Fluence Energy: Tier-one global battery energy storage system integrator serving utilities and developers; competes with HydraRedox for the same utility and C&I stationary-storage tenders, predominantly with Li-ion.
- Siemens Energy: Tier-one energy technology supplier with grid-scale storage and renewable-integration offerings; competes for utility-scale storage tenders HydraRedox targets via consortia such as BrainEn.
- Sumitomo Electric Industries: Japanese conglomerate running one of the world's longest-operating VRFB programmes for utility storage; an incumbent with overlapping chemistry and target end-customers.
Emerging players
- ESS Inc: US-based iron flow battery manufacturer commercialising long-duration stationary storage; competes for the same LDES niche as HydraRedox with an alternative flow chemistry.
Direct peers
- VRB Energy: Vanadium redox flow battery developer with multi-MW commercial deployments (Canada, China, Africa) addressing utility-scale renewable integration — competes head-on with HydraRedox in long-duration storage.
- Invinity Energy Systems: UK-listed pure-play vanadium redox flow battery maker targeting commercial and utility-scale stationary storage globally — the closest direct competitive overlap with HydraRedox's VRFB offering.
- SCHMID Energy Systems: European VRFB developer and producer (Everlasting product line) targeting residential and industrial stationary storage; overlaps directly with HydraRedox's industrial/residential focus and EU footprint.
- Enerox (CellCube): Austrian VRFB manufacturer focused on C&I and residential stationary storage using vanadium redox technology — directly comparable to HydraRedox's customer segments and chemistry choice.
- Rongke Power (Vanadis Power): Chinese flow-battery leader with very large-scale commercial deployments; competes with HydraRedox for global utility-grade long-duration storage opportunities.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat5 records
Key risks6 records
Key highlights6 records
Customer concentration
Hydraredox social profiles
Digital presenceHydraredox financial estimates
Financial estimateRevenue estimate
Valuation estimate
Hydraredox leadership team
Management profileNumber of profiles
Profiles1 record
Hydraredox subsidiaries and ownership
Company hierarchySubsidiaries1 record
Hydraredox funding detail
Funding detailFunding overview
Funding rounds1 record
Investors1 record
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Hydraredox 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 Hydraredox
What does Hydraredox do?
Hydraredox develops and manufactures Vanadium Redox Flow Battery (VRFB) systems for large-scale stationary energy storage, using a proprietary single-cell architecture with independently scalable power (5kW–50MW) and energy (minutes to >24 hours) sections, ~85% round-trip efficiency, ~30-year life, and ambient-condition safe operation. The company sells customized battery systems, in-house produced vanadium electrolyte packaged in IBCs, and turnkey engineering services (design, construction, commissioning) directly to renewable energy operators, industrial/commercial customers, and grid/utilities, with European production via its ES Hydra joint venture.
Is Hydraredox a public or private company?
Hydraredox is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Hydraredox founded?
Hydraredox was founded in 2015. It employs 1 to 10 people.
Where is Hydraredox based?
Hydraredox is headquartered in Zaragoza, Spain, in the Europe region.
How does Hydraredox make money?
Three revenue lines are on record. Vanadium Redox Flow Battery Systems are the primary driver. The others are turnkey Engineering Services and vanadium Electrolyte Production and Sales.
Who are Hydraredox's main competitors?
Broad incumbents on record are ABB, Fluence Energy, Siemens Energy and Sumitomo Electric Industries. ESS Inc is listed as an emerging player. Direct peers are VRB Energy, Invinity Energy Systems, SCHMID Energy Systems, Enerox (CellCube) and Rongke Power (Vanadis Power).
Does Hydraredox have an API?
No public API is recorded for Hydraredox.
What industry is Hydraredox in?
Hydraredox's product category is Stationary Energy Storage / Vanadium Redox Flow Batteries. Its primary akta.pro industry code is EUAFADAA, Electrochemical LDES (Flow Batteries & Other Long-Duration Batteries), with a secondary code of EUAFABAI, Battery Pack Manufacturing & Module Assembly. Its NAICS code is 335910.