What TESVOLT does

TESVOLT AG is a German specialist in commercial, industrial, and increasingly utility-scale lithium-ion battery energy storage systems, founded in 2014 and headquartered in Lutherstadt Wittenberg, Germany. The company designs, manufactures, and integrates battery storage hardware — cabinet systems including TAYTAN, FORTON, PowerCore G2, and E Series; container systems including the new 5 MWh TALLON and Samsung SDI co-developed Samsung Battery Box (SBB 1.0 and SBB 1.5) — together with proprietary energy management software (TESVOLT Energy Manager), an IoT infrastructure (IoT Gateway, Energy Controllers), and digital customer/partner services (myTESWORLD portal, Energy Trading Solution). Core enabling technology is a proprietary active bidirectional battery management system that achieves 92% cell balancing efficiency and supports a ~20-year battery lifespan, validated through TÜV Rheinland certification and BSFZ-recognized R&D work.

The business is organized around three wholly-owned subsidiaries plus one jointly-controlled entity: TESVOLT Energy GmbH handles flexibility marketing and energy trading; TESVOLT Projects develops large-scale battery parks; and TESVOLT OCEAN (JV) targets maritime storage. Revenue mechanics combine one-time project-based hardware sales (quote-driven, average systems in the 30 kWh to multi-megawatt range), recurring software/portal subscriptions, transaction-based income from energy trading and flexibility marketing, and professional services for project planning and implementation. Customers span commercial businesses, industrial companies, municipal utilities, agricultural operations, and increasingly utility-scale developers, with over 6,000 projects delivered since founding and a 2025 reference project at 190 MWh — the largest in company history.

The company holds ISO 9001:2015 certification, has ISO 27001 planned for 2026, and operates with a market-leading position in the German commercial storage band (30 kWh to 1 MWh). Strategic partners include Samsung SDI for containerized storage supply and Liechtenstein Group, Berenberg, E.R. Capital Holdings, and UBS as primary capital backers.

Name

TESVOLT

Legal name

TESVOLT AG

Website

https://tesvolt.com

Company type

Private

Founded year

2014

Operating status

Operating

Headcount range

101–250 employees

Short description

TESVOLT AG, founded in 2014 in Germany, manufactures commercial, industrial, and utility-scale lithium-ion battery storage systems combined with proprietary energy management software and energy trading services. The company serves C&I businesses, municipal utilities, agriculture, and maritime sectors across Europe and globally.

Ownership category

akta.pro rank

Product category

Commercial and Industrial Battery Energy Storage Systems

NAICS

Battery Manufacturing (33591), Battery Manufacturing (335910), Switchgear and Switchboard Apparatus Manufacturing (335313)

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Motors & Generators (3621)

akta.pro primary industry

Battery Modules & Packs (Industrial/Commercial pack assembly) (IMAGAHAB)

akta.pro secondary industries

Energy Storage Systems (BESS, Flywheels, Batteries) (HDABAKAC), Battery Cells (Li-ion, LFP, Sodium-ion, Lead-acid, NiMH) (IMAGAHAA)

Keywords

• Commercial battery storage
• Energy storage systems
• Battery management software
• Industrial energy management
• Grid-scale battery storage

Headquarters

HQ city

Wittenberg

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Battery Storage Hardware Sales: TESVOLT AG develops and manufactures battery storage systems (cabinets, containers) and sells them as complete units or individual components (battery modules, inverters, converters, IoT Gateway, Energy Controllers). Products include TESVOLT TAYTAN, FORTON, POWERCORE G2, TALLON, Samsung Battery Box, and E Series. Revenue is generated from one-time hardware purchase contracts with commercial and industrial buyers, as well as large-scale battery park projects through TESVOLT Projects.
2. Software, Digital Services & Portals: TESVOLT generates recurring revenue from software and digital services including the myTESWORLD monitoring portal, TESVOLT Energy Trading Portal, Energy Management System, and TESVOLT Portals. These SaaS-style services provide real-time monitoring, system insights, transparent revenue tracking, professional market access, and optimized monetization of storage flexibility on an ongoing subscription basis.
3. Energy Trading & Flexibility Marketing: TESVOLT Energy, a subsidiary, offers flexibility marketing and energy trading for all storage systems with grid connections from 50 kW. Storage systems can be used individually or aggregated to generate additional revenue through energy trading markets, ancillary services, and cross-market participation.
4. Project Planning & Implementation Services: TESVOLT Projects provides full-service planning and implementation of battery parks, including commissioning and ongoing maintenance. Services cover everything from project planning and system integration to commissioning and economic optimization during operation.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels11 records

Core offering

TESVOLT develops and manufactures lithium-ion battery energy storage systems for commercial, industrial, municipal utility, and agricultural applications, spanning modular battery cabinets (30 kWh–1 MWh) and large containerized systems (up to 190+ MWh). The hardware is integrated with proprietary software including an active bidirectional battery management system, TESVOLT Energy Manager, IoT Gateway, myTESWORLD monitoring portal, and an Energy Trading Solution that enables flexibility marketing and revenue generation from storage assets.

Product overview

TESVOLT is a German provider of commercially-focused battery energy storage systems combining hardware (battery cabinets and container systems), intelligent energy management software, and digital services. The product portfolio centers on lithium-ion battery storage solutions in two main hardware form factors: modular battery cabinets (TAYTAN, FORTON, E Series) for commercial/industrial applications from 30 kWh to 1 MWh, and large container systems (TALLON, Samsung Battery Box) for utility-scale projects up to 190+ MWh. These are complemented by system components including the IoT Gateway and Energy Controllers for connectivity and grid integration. The software layer consists of the TESVOLT Energy Manager (energy management), Energy Trading Solution (market access), and myTESWORLD Portal (monitoring), all connected via the proprietary IoT architecture. The company operates through subsidiaries TESVOLT Energy (flexibility marketing/trading) and TESVOLT Projects (battery park development), with solutions targeting applications from self-consumption optimization and peak shaving to energy trading and ancillary services, for systems starting at 50 kW.

Differentiator

Problem solved

Functional benefit

Brands

• TESVOLT TAYTAN: Stackable and cyber-secure battery storage cabinet system
• TESVOLT FORTON
• POWERCORE G2
• TESVOLT TALLON
• Samsung Battery Box
• TESVOLT Energy Manager
• myTESWORLD
• Energy Trading Portal

Products and services

• TESVOLT TAYTAN Stackable battery cabinet storage system with cyber-secure design for commercial and industrial applications.
• TESVOLT FORTON Outdoor battery storage system with high-temperature cells designed for energy trading and high cycle stability in commercial and industrial applications.
• POWERCORE G2 500 kWh battery energy storage system for commercial, industrial, and smaller utility-scale projects, combining WHES hardware with TESVOLT proprietary control and cybersecurity software to deliver high-quality storage at lower cost.
• E Series Battery storage system series for commercial and industrial applications.
• TESVOLT TALLON Large 5 MWh container storage system for municipal utilities and utility-scale projects with proprietary battery park control system and European inverters for enhanced cybersecurity and co-location storage.
• Samsung Battery Box (SBB 1.0 and SBB 1.5) Containerized battery storage solutions featuring Samsung SDI cells, available in SBB 1.0 and SBB 1.5 (5.26 MWh) variants, with over 95% charge/discharge efficiency, at least 97% annual operating availability, up to 20-year warranty, and German data residency for municipal utilities and businesses.
• TESVOLT Energy Manager Intelligent energy management software providing full transparency, automated control, and optimized economic performance for battery storage systems, connecting storage, inverters, and measurement devices via the TESVOLT IoT Gateway.
• TESVOLT Energy Trading Solution Cloud-based energy trading platform providing transparent revenues, professional market access, and optimized monetization of storage flexibility across energy markets, ancillary services, and cross-market participation.
• myTESWORLD Portal Web-based customer monitoring portal providing real-time monitoring, system insights, and full performance transparency across all installed storage assets.
• TESVOLT Portals Portal suite for monitoring and energy management including the Energy Trading Portal for market access and trading functionality.
• TESVOLT Energy (Energy Trading Service) Subsidiary offering flexibility marketing and energy trading services for all storage systems with grid connections from 50 kW, enabling aggregation and cross-market participation to generate revenue from storage flexibility.
• TESVOLT Projects (Battery Park Development Service) Full-service subsidiary providing planning, implementation, commissioning, and ongoing maintenance of battery parks for municipal utilities, delivered as one-stop-shop project services.
• TESVOLT OCEAN Joint venture developing battery storage solutions specifically designed for the demanding conditions of maritime applications at sea and on inland waterways.

Quantifiable outcome

• 92% cell balancing efficiency through active bidirectional BMS, enabling 20-year battery lifespan with 90% depth of discharge
• +3 more outcomes

Named customers4 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 capability2 records

Feature6 records

Partnerships

Three partnerships are on record, tiered core and minor.

• Samsung SDIcoreTechnology or Integration · 3 December 2025Samsung SDI signed a supply agreement with TESVOLT to provide its Samsung Battery Box (SBB) systems for commercial energy storage solutions in Europe. Samsung SDI supplies the SBB 1.0 model and the upgraded SBB 1.5 model for TESVOLT's containerized battery storage products. Both companies plan to continue discussions for additional battery supplies and joint promotional efforts to secure future ESS business opportunities in the European market. The SBB 1.5 features lithium nickel-cobalt-aluminum cells and offers over 95% charge/discharge efficiency with up to 20-year warranty.
• Samsung SDIcoreTechnology or Integration · 4 June 2025TESVOLT and Samsung SDI jointly announced the 5.26 MWh SBB 1.5 containerized battery storage product designed for municipal utilities and businesses, featuring lithium nickel-cobalt-aluminum cells, over 95% charge/discharge efficiency, at least 97% annual operating availability, and up to 20-year warranty with data stored on German servers. Deliveries scheduled to begin Q2 2026.
• TibberminorGTM or Marketing PartnerTibber is an initial customer of Kiwigrid's pan-European virtual power plant platform. Separately, TESVOLT Energy is mentioned as one of the companies expanding into VPP aggregation or energy trading alongside Enercity, Kraken, and Sonnen.

Scale indicators6 records

Recent moves9 records

Expansion highlights6 records

Direct peers

• Sonnen: German manufacturer of residential and commercial battery storage systems, now owned by Shell. Closely comparable to TESVOLT in product category, target segment (C&I in DACH), and integrated energy-management software offerings.
• BYD Energy Storage: Global vertically integrated battery and BESS manufacturer offering containerized C&I and utility-scale systems. Comparable to TESVOLT in product category and customer segments, with broader scale and a more aggressive cost position.
• Varta: German battery manufacturer with residential and C&I energy storage product lines. Comparable to TESVOLT in product category and DACH market presence, though focused more on smaller-format systems and cells.
• SENEC: German-based battery storage and virtual power plant operator (owned by EnBW). Closely comparable to TESVOLT on integrated hardware + cloud + energy trading business model and DACH customer base, with primary residential tilt but expanding into C&I.
• E3/DC: German residential and small-commercial battery storage brand (part of Hager Group). Comparable to TESVOLT on integrated inverter + storage + energy management offering and German customer base, but skewed toward smaller systems.

Broad incumbents

• Tesla Energy (Megapack / Powerpack): Operates globally in commercial and utility-scale energy storage with Megapack and Powerpack. Competes with TESVOLT in the same customer segments but at much larger scale and with proprietary cells, software, and grid-services integration.
• Sungrow: Chinese-headquartered inverter and energy storage provider with a strong European C&I and utility-scale footprint. Comparable offering profile (inverters + BESS) to TESVOLT, with broader product breadth and competitive pricing.
• Huawei Digital Power: Provides smart PV and energy storage solutions globally, including C&I string inverters and LUNA2000 BESS. Overlaps with TESVOLT in C&I segments and grid-tied applications, with broader scale and integrated digital energy platform.
• SMA Solar Technology: German inverter and energy management specialist with growing BESS offerings for C&I and utility-scale. Comparable to TESVOLT on the German/European C&I customer base and on energy management software, but from an inverter heritage.

Others

• Kiwigrid: Dresden-based white-label energy management and virtual power plant platform that integrates third-party batteries (and explicitly partners with storage providers including in TESVOLT's ecosystem). Comparable to TESVOLT's Energy Manager / IoT Gateway layer and partner-channels but software-only.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xxing.com/pages/tesvoltag-the-energy-storage-experts
• YouTubeyoutube.com/@TESVOLT
• Facebookfacebook.com/tesvolt
• LinkedInlinkedin.com/company/tesvolt
• Instagraminstagram.com/tesvolt

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Subsidiaries3 records

Funding overview

Funding rounds4 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 TESVOLT