Hybrid Energy Storage Solutions

What Hybrid Energy Storage Solutions does

Hybrid Energy Storage Solutions S.L. (HESStec) is a privately held Spanish energy technology company incorporated in February 2018 in Paterna (Valencia), with an R&D center in Sevilla, that designs and delivers hybrid energy storage systems combining lithium-ion batteries with ultracapacitors. Its flagship control architecture centers on InMS (Intelligent Node Management System), a high-speed energy management platform with sub-50ms response time that coordinates all storage assets and runs software modules for grid services; UCMS manages ultracapacitor stacks with active balancing and SOC/SOH estimation; SHAD provides the power electronics layer (DC-DC and DC-AC modules); and FS4G packages the system in a containerized, grid-deployable form factor. Proprietary patented algorithms model grid asset operation and degradation to enable multi-service operation (virtual inertia, frequency response, voltage control, arbitrage, ramp rate control, black start, and grid-forming capability), and a 1.5 MW Advanced Grid Lab in Spain allows real-condition validation against demanding grid codes before deployment.

The company addresses grid stability, renewable integration, EV charging infrastructure, microgrids, and port decarbonization through five solution families: INERTIA+ (replacing synchronous condensers for T&D operators), RES+ (multi-service storage for developers, utilities, and power generators), Reliability uGrid (C&I microgrids with grid-forming), EV-Enabler (overcoming grid constraints for EV charging deployment), and Geports (port decarbonization). Named deployments include a 5 MW/38.88 MJ ultracapacitor system for RTL in the UK, a 2 MW SHAD-based microgrid in Soria (Spain), a 100 kW system for a critical infrastructure facility in Valencia, and a 1 MW/1,275 MWh system in Puerto Rico.

HESStec generates revenue primarily through turnkey hardware-plus-integration sales of custom-configured hybrid energy storage systems, supplemented by professional services (techno-economic analysis, technical design, integration, operation and maintenance, and testing/certification) and a growing software/SaaS layer via the Grid Core Suite (SCADA, Cloud UI, SOF-Flexibility, Optimal Planning Software). Go-to-market is exclusively enterprise direct sales — no self-serve or product-led motion — targeting T&D operators, utilities, power generators, and large C&I customers, with EU-funded research consortia (HYBRIS, Hy4Grid with Acciona, LIFE ReLiGHT with Capital Energy, PROGRESSUS with Infineon) serving as co-development and reference channels. Pricing is not publicly disclosed and is obtained through direct engagement. As of June 2025, the company has raised approximately €15.2 million in equity, including a €12 million round from Suma Capital, ABB, and VERBUND X Ventures earmarked for global expansion, and is led by CEO Eugenio Domínguez, a 20-year veteran of energy storage and power electronics.

Name

Hybrid Energy Storage Solutions

Legal name

Hybrid Energy Storage Solutions S.L.

Website

https://hesstec.net

Company type

Private

Founded year

2018

Operating status

Operating

Headcount range

11–50 employees

Short description

HESStec is a Spanish energy technology company that designs and delivers hybrid energy storage systems combining lithium-ion batteries and ultracapacitors, with proprietary control platforms (InMS, UCMS, SHAD), for transmission and distribution operators, utilities, renewable developers, and C&I customers globally.

Ownership category

akta.pro rank

Product category

Energy Storage Systems

NAICS

Electric Power Transmission, Control, and Distribution (22112), Switchgear and Switchboard Apparatus Manufacturing (335313)

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Switchgear & Switchboard Apparatus (3613)

akta.pro primary industry

Microgrid Controllers, Energy Management & DER Orchestration (MGC, SCADA, Optimization) (EUAFAJAH)

akta.pro secondary industries

Renewables + Storage Hybrid Plant Controller & Co-Optimization (Solar/Wind + BESS) (EUAFAKAF), SCADA/Telemetry, Data Integration & Device Connectivity for Storage/DER Control (EUAFAKAI), Microgrid & Distributed Grid Equipment (Controllers, Switchgear Packages, DER Interconnection) (IMAGAAAJ), Microgrid Protection, Switchgear & Interconnection Equipment (Relays, Breakers, ATS) (EUAFAJAL)

Keywords

• Hybrid energy storage
• Grid-scale batteries
• Ultracapacitor storage systems
• Power electronics management
• Renewable integration solutions

Headquarters

HQ city

La Rinconada

HQ country

Spain

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Turnkey Energy Storage Systems (Hardware + Software + Integration): Sale and delivery of complete hybrid energy storage solutions including proprietary control platforms (InMS, UCMS, SHAD), energy storage equipment, power electronics, and full integration. Solutions are configured and sized for specific customer applications and grid code requirements.
2. Operation & Maintenance Services: Ongoing O&M services for installed energy storage systems, leveraging remote monitoring capabilities to achieve optimal asset performance. Typically bundled with system delivery or contracted separately.
3. Technical Design and Engineering Services: Technical office services including techno-economic sizing and analysis, system design, grid code compliance support, and project delivery management. Provided both as standalone consultancy and as part of turnkey project delivery.
4. Testing & Certification Services: Laboratory testing and certification services for energy storage systems, leveraging the Advanced Grid Lab to validate compliance with demanding grid codes and certify systems for deployment.
5. Grid Core Software Modules: Licensing or subscription of proprietary software modules running on the InMS platform (Advanced Quick Services, Quick Services, Energy Economic Optimization, Microgrid Management, Hybridization, SHAD Controller, INMS Base) and cloud/customer-premise modules (SCADA, Cloud UI, SOF-Flexibility, Optimal Planning Software).

Go-to-market motion2 records

Distribution channels1 record

Marketing channels4 records

Core offering

HESStec designs, manufactures, and integrates hybrid energy storage systems that combine lithium-ion batteries with ultracapacitors, managed by proprietary control platforms (InMS, UCMS, SHAD) and software modules for grid-scale applications. The company delivers turnkey solutions — including hardware, control software, integration, and O&M services — targeting grid stability, renewable integration, microgrids, EV charging support, and port decarbonization.

Product overview

HESStec offers a platform-plus-modules architecture for hybrid energy storage solutions. The core products include InMS™ (Intelligent Node Management System) as the central hardware control platform, UCMS™ for ultracapacitor management, SHAD™ for power electronics management, and UCAPs Stacks/FS4G™ for energy storage hardware. These integrate through the Grid Core Suite of software modules (including Advanced Quick Services, Energy Economic Optimization, and Microgrid Management modules) to enable multi-service operation of hybrid energy storage systems. HESStec's solutions combine these products with services (In Depth Analysis, Technical Design, Integration, Operation & Maintenance, Testing & Certification) across five solution families: INERTIA+ (for grid stability replacing synchronous condensers), RES+ (for renewable integration), Reliability uGrid (for C&I sector), EV-Enabler (for EV infrastructure), and Geports (for port decarbonization).

Differentiator

Problem solved

Functional benefit

Products and services

• InMS™ (Intelligent Node Management System) Hardware control platform integrating proprietary algorithms for optimal planning and multi-service operation of hybrid energy storage systems at grid scale, with sub-50ms response time and integrated Grid Sentinels, protections, firewall, and UPS in a cabinet form factor.
• UCMS™ (Ultra Capacitor Management System) Control platform for managing ultracapacitor stacks at grid scale, performing all actions for optimal and safe operation of hybrid energy storage systems with active balancing and SOC/SOH estimation.
• UCAPs Stacks Ultracapacitor modules integrating with HESStec's UCMS and InMS control platforms to deliver high-power, fast-response energy storage at grid scale.
• FS4G™ (Containerized Hybrid Storage Solution) Fully integrated, containerized hybrid energy storage solution combining UCAPs stacks with all required control and power electronics infrastructure for grid-scale deployment of fast-response and grid stability services.
• SHAD™ Power Management System Power management product for hybrid energy storage systems consisting of DC-DC and DC-AC power modules, sensors, actuators, and an InMS SHAD slave for grid stability and fast services, integrated into a cabinet.
• Grid Core Suite Comprehensive software suite running on InMS hardware and in cloud/customer facilities, including Advanced Quick Services, Quick Services, Energy Economic Optimization, Microgrid Management, Hybridization, SHAD Controller, INMS Base, SCADA, Cloud UI, SOF-Flexibility, and Optimal Planning Software modules.
• BESSTRADE Software product co-developed with Alantra's Energy Transition division that optimizes battery storage operation, providing techno-economic analysis, optimal configuration proposals, and multi-service operation support for energy storage systems.
• INERTIA+ Solution Solution for transmission and distribution operators that replaces synchronous condensers with controllable hybrid energy storage, providing virtual inertia, voltage control, frequency regulation, and all available energy storage services to reduce Capex and Opex.
• RES+ Solution Solution for renewable energy developers, utilities, and power generators that meets grid code requirements and delivers multi-service energy storage operation including time shifting, arbitrage, power smoothing, frequency response, ramp rate control, and reactive support, integrated with renewables or standalone.
• Reliability uGrid (UGRID+) Solution Scalable solution for the commercial and industrial sector providing grid stability and economic optimization through the InMS system, integrating renewable generation, optimizing self-consumption, and ensuring grid parameters with grid-forming technology for gridless or unstable applications.
• EV-Enabler Solution Solution for utilities and infrastructure companies that enables electric vehicle charging infrastructure deployment and microgrid management, addressing power limitations in existing grids and offering distribution deferral through InMS, SHAD, and software modules.
• Geports Solution Solution for maritime ports and port infrastructure companies enabling decarbonization through microgrid management, addressing distribution restrictions from peak consumptions by machines, cranes, and electric boats while integrating renewable generation.
• Energy Storage Project Services End-to-end services for energy storage projects including in-depth analysis, technical design, integration and optimization, operation and maintenance, and testing and certification.

Quantifiable outcome

• Sub-50ms response time for grid services using the InMS platform
• +3 more outcomes

Named customers4 records

Segments5 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability3 records

Feature9 records

Partnerships

Eight partnerships are on record, tiered core and minor.

• Alantra (Energy Transition)coreStrategic or Co-development PartnerHESStec and Alantra's Energy Transition division jointly launched BESSTRADE, a software solution to optimize battery operation. This appears to be a co-development partnership combining HESStec's energy storage control expertise with Alantra's energy transition capabilities.
• HYBRIS Project Consortium (15 European Partners)coreStrategic or Co-development PartnerHESStec participates in the EU-funded HYBRIS project (H2020-LC-BAT-9, Grant No. 963652) focused on optimizing hybrid battery systems for microgrid applications. Consortium includes 15 partners across 6 countries. HESStec provides the InMS control system for optimal plant operation and grid services. Project demonstrations at 3 pilot sites in Italy, Belgium, and the Netherlands.
• Hy4Grid Project — AccionacoreStrategic or Co-development PartnerHESStec partners with Acciona in the Hy4Grid project to implement 100% renewable hybrid electricity generation and storage technology. HESStec provides InMS-based grid forming control for hybrid storage at Acciona's Barasoain wind plant (2.3 MW storage with ultracapacitors and batteries) and Montes del Cierzo PV plant in Navarra, Spain.
• LIFE ReLiGHT Project — Capital Energy, CEN, Beeplanet, Envirobat, ZabalacoreStrategic or Co-development PartnerHESStec participates in the European LIFE project (No. 101074411) led by Capital Energy, providing InMS control systems for second-life battery storage at two photovoltaic plants in Albacete (La Encantada I: 3 MW/6.3 MWh; La Encantada II: 2 MW/4.9 MWh). The project promotes recycling and circular economy aspects using second-life EV batteries.
• PROGRESSUS Project — Infineon, Iquadrat, CTTC, LeitatminorStrategic or Co-development PartnerHESStec participates in the European PROGRESSUS project (ECSEL Joint Undertaking) led by Infineon with 22 European companies. Focuses on power conversion, energy management for grids and microgrids, and metrology/monitoring for smart grids.
• SPARTAN Project (H2020 Clean Sky)minorStrategic or Co-development PartnerHESStec is a member of the SPARTAN project (Grant No. 821381) under H2020 Clean Sky, developing Intelligent Power Modules (IPMs) for power conditioning of multiple electrical sources in aircraft. HESStec contributes its control electronics technologies to the project.
• HL-Powertrain Project — Zeleros, Ziur Composites, ITE, Polytechnic University of ValenciaminorStrategic or Co-development PartnerHESStec participates in the HL-Powertrain project (EU FEDER-funded, Valencian Innovation Agency AVI) focused on hyperloop propulsion. HESStec leads development of grid integration system prototype, fast charging technology study, and hybrid storage systems study for the project.
• ZelerosminorStrategic or Co-development PartnerZeleros, the hyperloop development company leading the HL-Powertrain project, partnered with HESStec for energy management system development, grid integration, and fast charging technology for hyperloop applications.

Scale indicators6 records

Recent moves7 records

Expansion highlights7 records

Direct peers

• Stem Inc: Stem is a US-listed energy storage and AI-driven software platform provider focused on customer-sited and grid-scale batteries with optimisation software for multi-service revenue stacking. It is the closest direct peer in combining storage hardware with proprietary optimisation software and recurring SaaS-style revenue.
• Fluence Energy: Fluence is a global leader in grid-scale battery energy storage products, services, and software (the Fluence Mosaic platform), competing head-to-head with HESStec in the multi-service BESS space for utilities and developers. Comparable business model combining turnkey hardware with software-defined services.
• Wärtsilä Energy Storage: Wärtsilä's energy storage business delivers grid-scale battery and hybrid storage solutions, including its GEMS Digital Energy Platform for multi-application optimisation. It is a direct competitor in the utility-scale, software-managed storage segment where HESStec also plays.
• EnerSys: EnerSys manufactures industrial batteries and is a leading ultracapacitor supplier (via the Maxwell Technologies brand) for high-power energy storage applications. Closely comparable to HESStec's UCAP stacks / hybrid architecture and a likely component supplier and competitor in grid stability use cases.
• Alfen: Alfen is a European provider of energy storage, smart grid, and EV charging solutions, including its TheBattery modular BESS line and the Active Load Management software platform. Comparable as a European mid-cap delivering turnkey storage systems and grid services software to utilities and C&I customers.

Broad incumbents

• Tesla Energy: Tesla's energy business (Megapack, Powerpack, Autobidder) is a global incumbent in grid-scale BESS with integrated software. While not focused on hybrid ultracapacitor architectures, it is a primary competitor in the broader market HESStec targets.
• ABB Electrification: ABB is a strategic investor in HESStec and a broad incumbent in grid power conversion, switchgear, and increasingly energy storage systems. Its scale and customer footprint in European utilities is the most important incumbent benchmark and channel risk for HESStec.
• Saft (TotalEnergies): Saft designs and manufactures advanced battery systems for industrial and grid applications, including containerised BESS for transmission and distribution operators. Comparable as an established battery/storage supplier serving European T&D and large C&I customers.

Emerging players

• Nuvve Holding Corp: Nuvve is a smaller public company focused on vehicle-to-grid (V2G) and distributed energy storage aggregation, with a software platform (GIVe) for grid services. Comparable emerging player in the storage+software/grid-services niche relevant to HESStec's EV-Enabler and microgrid solutions.
• Nidec ASI: Nidec ASI (formerly ASI-Robicon) supplies power conversion, energy storage, and microgrid solutions, including ultracapacitor-based products for industrial and grid applications. Relevant as a more established European peer in hybrid storage and PCS technology.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks7 records

Key highlights7 records

Customer concentration

• Xx.com/HESS_Solutions

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds3 records

Investors3 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 Hybrid Energy Storage Solutions