What E22 Energy Storage Solutions does

E22 Energy Storage Solutions (legal entity Energy Storage Solutions, S.L.U.) is a Spanish energy storage system integrator and equipment manufacturer, founded in late 2014 as the storage arm of the Gransolar Group renewable energy conglomerate. The company designs, manufactures, and delivers battery energy storage systems based primarily on Vanadium Redox Flow Battery (VRFB) chemistry, with a secondary lithium-ion (LFP) product line, plus proprietary control software (BMS, LEMS, and the ETER Energy Management System) and power electronics (B2GRID for grid-connected operation, GRIDMAKER for microgrids, DSTATCOM, and PV inverters). Its flagship products are the VCUBE50 (50 kW / 200 kWh) and VCUBE250 (250-330 kW modular) VRFB units and the 300/600 kW - 1000 kWh containerized Li-Ion system, marketed for utility-scale and industrial use cases with claimed 12,000+ cycle life, 20+ year operational life, and sub-70 ms dynamic response.

E22 monetizes across four revenue streams: Turnkey EPC project delivery with a 100% performance guarantee, hardware sales of battery systems and power electronics, design and integration service contracts, and project-development sales of ready-to-build storage pipelines to asset developers such as Aquila Capital. Its go-to-market is enterprise field sales targeting utilities, grid service providers, and project developers, with direct engineering-led selling supported by its sister company GRS for combined solar-plus-storage offerings. Manufacturing and Balance of Plant assembly run out of Valencia (Chiva), the corporate headquarters sit in Madrid, and a commercial office opened in London in May 2022 as part of an explicit push into Australia, the UK, and the USA. Named customers include AusNet Services (5 MW/7.7.5 MWh Longwarry grid support project), Naturgy (Zamora VRFB), BHEL (India), IMDEA Energy (R&D), and Aquila Capital, with a stated 1 GW (2 GWh) Australian storage development target.

Name

E22 Energy Storage Solutions

Legal name

Energy Storage Solutions, S.L.U.

Website

https://energystoragesolutions.com

Company type

Private

Founded year

2014

Operating status

Operating

Headcount range

11–50 employees

Short description

E22 Energy Storage Solutions is a Spanish subsidiary of Gransolar Group that designs, manufactures, and integrates Vanadium Redox Flow Battery and lithium-ion storage systems, BMS/EMS control software, and Turnkey EPC services for utilities, grid service providers, and asset developers in Europe, Australia, the UK, and the USA.

Ownership category

akta.pro rank

Product category

Energy Storage Systems

NAICS

Battery Manufacturing (33591), Electric Bulk Power Transmission and Control (221121)

SIC

Electric Services (4911)

akta.pro primary industry

EMS / SCADA / DERMS Controls Integration for Storage (EUAEAEAG)

akta.pro secondary industries

Energy Storage Software & Controls (EMS, monitoring, optimization, cybersecurity) (IMAGAHAJ), Battery Modules & Packs (Industrial/Commercial pack assembly) (IMAGAHAB), Ancillary Services Aggregation & Bidding Optimization (DER/VPP participation) (EUAFALAJ), BESS O&M and Lifecycle Services (Warranty, Spares, Monitoring) (EUAEAEAM), Battery Safety Engineering (Fire Detection/Suppression, Hazard Mitigation) & Code Compliance (EUAEAEAI)

Keywords

• Vanadium redox flow batteries
• Lithium-ion battery storage
• Utility-scale energy storage
• Grid battery systems
• Power control systems

Headquarters

HQ city

Chiva

HQ country

Spain

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Turnkey EPC Projects: Full Engineering, Procurement, and Construction services for energy storage installations where E22 guarantees 100% of expected facility performance. Customer receives complete integrated solution from project inception to successful completion.
2. Battery Storage Systems: Sale of VRFB and Li-Ion battery systems including VCUBE50 (50kW/200kWh), VCUBE250 (250-330kW modular), and containerized Li-Ion solutions. Products delivered in turnkey packages or flexible delivery of certain elements.
3. Energy Management System Services: Design, integration, and leasing of energy storage systems with control and monitoring systems (EMS, BMS, PCS) offered under service contracts. Customers benefit without CapEx requirement and receive immediate savings or revenue improvements.
4. Power Control Systems (B2GRID and GRIDMAKER): Battery power control system solutions for grid-connected or isolated grid operation, based on modular battery inverters supporting various battery technologies including flow, lithium, and lead batteries.
5. Project Development Sales: Sale of energy storage projects in development phases to investors and asset development companies. E22 develops projects to 'ready-to-build' or 'turnkey' phase and sells them to strategic partners like Aquila Capital.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels5 records

Core offering

E22 designs, manufactures, and integrates utility-scale battery energy storage systems using Vanadium Redox Flow Battery (VCUBE50, VCUBE250) and Lithium-Ion LFP technologies, complemented by proprietary management software (BMS, LEMS, ETER EMS) and modular power control platforms (B2GRID for grid services, GRIDMAKER for microgrids). The company delivers these systems via Turnkey EPC project delivery with a 100% performance guarantee, flexible component supply, Energy Management Service Contracts (leasing model with no customer CapEx), and the sale of 'ready-to-build' storage projects to investors and asset developers. Its target customers are grid service providers, utilities, energy storage investors, and industrial/commercial operators in Australia, the UK, the USA, and Europe.

Product overview

E22 Energy Storage Solutions offers an integrated portfolio of energy storage products and services centered on Vanadium Redox Flow Battery (VRFB) technology as its primary offering. The product line includes two VRFB systems (VCUBE50 at 50kW/200kWh and VCUBE250 at 250-330kW) and Li-Ion battery solutions (300/600kW - 1000kWh), complemented by proprietary management systems: BMS for battery control, LEMS for local coordination, and ETER for enterprise-wide energy management. Power control is addressed through B2GRID (grid services) and GRIDMAKER (microgrid control). Services include turn-key EPC projects, system integration, and energy management under service contracts. The VRFB technology provides the core differentiator with unlimited cycles, 20+ year operational life, and no fire risk, while Li-Ion addresses shorter-duration applications.

Differentiator

Problem solved

Functional benefit

Brands

• VCUBE50: 50kW vanadium redox flow battery system with 4 hours energy storage, packaged in a standard 20' container with remote diagnostic and continuous monitoring capabilities.
• VCUBE250
• ETER
• B2GRID
• GRIDMAKER

Products and services

• VCUBE50 (50 kW VRFB System)
• VCUBE250 (250-330 kW VRFB System)
• Li-Ion Battery Systems (300/600 kW - 1000 kWh)
• B2GRID Power Control System
• GRIDMAKER Power Control System
• Turnkey EPC Projects
• Energy Management Services

Quantifiable outcome

• 12,000+ cycles at full power and 100% DOD
• +3 more outcomes

Named customers5 records

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability1 record

Feature5 records

Partnerships

Four partnerships are on record, tiered core and minor.

• AusNet ServicescoreOthers · 8 November 2022AusNet Services is the grid service provider for the Longwarry project in Victoria, Australia. Under the grid support agreement, E22 makes battery capacity available during summer peak periods and emergency events. Outside emergency dispatch periods, E22 participates in electricity and ancillary services markets. This represents E22's first GRS storage project in Australia.
• GRS (Gransolar Services)coreStrategic or Co-development PartnerGRS is the solar EPC company within Gransolar Group that partners with E22 for combined renewable and storage project delivery. Together E22 and GRS form a 'great pairing' in commitment to storage. E22 installs batteries while GRS provides solar EPC services, benefiting from synergies within Gransolar Group.
• IMDEA EnergyminorStrategic or Co-development PartnerIMDEA Energy (Institute for Advanced Energy) partnered with E22 for installation of a vanadium flow battery at their Total Photovoltaic Platform (LPT) project. This research partnership supports E22's R&D activities in energy storage integration.
• Gransolar GroupcoreStrategic or Co-development PartnerE22 is an integrated company within Gransolar Group, leveraging engineering strengths and industrial capabilities. Gransolar Group has been involved in renewables since 2005 with expertise in photovoltaics, solar tracker manufacturing (PV Hardware), and engineering services (ISE). E22's storage division started in 2014.

Scale indicators8 records

Recent moves7 records

Expansion highlights3 records

Direct peers

• Invinity Energy Systems: Invinity is a pure-play vanadium redox flow battery manufacturer targeting commercial, industrial, and microgrid storage — overlapping directly with E22's VCUBE50/VCUBE250 product line and customer segments in long-duration storage.
• Sungrow: Sungrow is a major global power electronics manufacturer with a large utility-scale BESS product line (ST-series) and integrated PCS+EMS offering. Direct competitor to E22 in BESS hardware + control systems for utility and C&I customers.
• Saft (TotalEnergies): Saft is an established industrial battery manufacturer offering lithium-ion and specialty battery storage systems for grid, microgrid, and industrial applications. Comparable to E22's broader storage portfolio and enterprise customer targeting.
• BYD Energy Storage: BYD is a vertically-integrated battery and BESS provider with strong global utility-scale presence and proprietary lithium-iron-phosphate cells. Direct competitor to E22's Li-Ion storage line and broader EPC offering.
• CellCube (Enerox): CellCube/Enerox is a dedicated vanadium redox flow battery manufacturer targeting utility-scale and microgrid applications — directly competing with E22's VCUBE product family in long-duration flow battery storage.
• Fluence Energy: Fluence is a leading global utility-scale battery energy storage system integrator offering turnkey BESS solutions with proprietary energy management software (Mosaic). Direct competitor to E22 in EPC/integration of grid-scale storage with software stack, serving similar utility and investor customers.

Broad incumbents

• ABB: ABB is a broad incumbent in power electronics, grid automation, and energy storage solutions with significant overlap to E22's PCS (B2GRID) and grid integration offerings. Competes primarily at the power-control/EMS layer rather than battery cells.
• Schneider Electric: Schneider Electric offers end-to-end energy management software (EcoStruxure) and grid/storage integration services for utilities and C&I customers. Overlaps with E22's ETER EMS and microgrid controller offerings at the software/system layer.
• Hitachi Energy: Hitachi Energy provides grid automation, power conversion, and energy storage integration solutions for utilities globally. Comparable to E22 in BESS grid services (frequency regulation, ancillary services) and microgrid control scope.
• Tesla Energy (Megapack): Tesla's Megapack division is the largest utility-scale BESS provider globally, offering integrated hardware + software (Autobidder) plus project development support. Direct overlap with E22's utility-scale EPC offering but at vastly greater scale and capital base.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/energy-storage-solutions

Compliance8 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds

Investors

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 E22 Energy Storage Solutions