Diotech

What Diotech does

Diotech OÜ is an Estonian systems integrator founded in 2014 in Tartu, operating across battery energy storage systems (BESS), solar power plants, lighting services, EV charging infrastructure, and electrical construction. The company combines hardware procurement (batteries from LG Energy Solution and SMA AG, inverters from Power Electronics) with proprietary control software, including the Diotech FLEX controller, a custom SCADA system co-developed with Atemix Tööstusautomaatika, and a master controller architecture developed with CGI Estonia, to enable grid-scale storage operators to monitor profitability and participate in frequency reserve and power exchange markets. The group's services span turnkey BESS integration (notably the 26.5 MW / 53.1 MWh Auvere facility for Eesti Energia and the 100 MW / 200 MWh Zirgu project under construction), solar EPC and a 7-10 year solar-as-a-service model, 'Lighting as a Service' subscriptions with zero upfront investment, EV charging deployment, and long-term operation and maintenance contracts, delivered through subsidiaries Diotech Electric OÜ, Diotech Nord OÜ, Solar Wheel OÜ (Sunecor), and Solar Rent OÜ.

Diotech serves three primary customer segments: utility and grid-scale operators needing grid stabilization and frequency reserves, commercial and industrial clients seeking energy cost optimization and energy security, and building owners and municipalities pursuing LED and smart-lighting upgrades. Its go-to-market is enterprise field sales with a hybrid direct-tender and framework-agreement approach; recent anchor wins include international tenders for Eesti Energia and Energix Polska, the Zirgu BESS joint venture with Transcom AS, and framework agreements with Enefit Green for solar EPC. The group markets through direct enterprise sales, its diotech.ee and valgus.diotech.ee websites, Estonian media coverage, and Enterprise Estonia (EAS) development-program visibility.

Financially, Diotech grew consolidated turnover from EUR 11.5 million in 2023 to EUR 25.1 million in 2024 with EUR 1.65 million net profit, supported by EAS grant financing of approximately EUR 678,000 across two phases (2019 and 2021-2023) and project financing from Swedbank for Zirgu. The company is privately held by founders Mart Moora and Siim Soplepmann, with wholly-owned subsidiaries in Estonia, Latvia, Lithuania, and operations expanding into Poland via the Energix Polska battery park project. Headcount is not publicly disclosed; ISO 9001:2015 certification from Bureau Veritas covers all four Estonian operating entities.

Name

Diotech

Legal name

Diotech OÜ

Website

https://diotech.ee

Company type

Private

Founded year

2014

Operating status

Operating

Headcount range

1–10 employees

Short description

Diotech OÜ is an Estonian systems integrator founded in 2014 that designs, installs, and operates battery energy storage systems, solar power plants, smart lighting, and EV charging infrastructure for utility, commercial-industrial, and municipal customers across the Baltics and Poland.

Ownership category

akta.pro rank

Product category

Energy Systems Integration

NAICS

Electric Power Generation, Transmission and Distribution (2211), Switchgear and Switchboard Apparatus Manufacturing (335313), Electrical Equipment, Appliance, and Component Manufacturing (335), Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512)

SIC

Switchgear & Switchboard Apparatus (3613), Electric Lighting & Wiring Equipment (3640)

akta.pro primary industry

BESS EPC, Integration & Commissioning (EUAFAAAB)

akta.pro secondary industries

Utility-Scale BESS EPC & Integration (EUAEAEAA), DER & Microgrid Interconnection / Grid Edge Integration Services (EUAEANAF), Microgrid & Distributed Grid Equipment (Controllers, Switchgear Packages, DER Interconnection) (IMAGAAAJ)

Keywords

• Battery energy storage
• Solar power systems
• Lighting as a service
• Electrical construction
• Energy systems integration

Headquarters

HQ city

Tartu

HQ country

Estonia

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. BESS System Integration: Design, supply, installation, and integration of large-scale battery energy storage systems for utility and C&I customers. Revenue from project-based contracts with major infrastructure investments (e.g., 26.5 MW / 53.1 MWh systems).
2. Lighting as a Service (LaaS): Full-service lighting solutions where customers pay for illumination without purchasing fixtures. Includes design, installation, maintenance. Zero upfront investment model where energy savings cover monthly payments over service period.
3. Solar Power Plant Services: Solar station services enabling customers to generate electricity without initial investment through 7-10 year service contracts. After contract period, ownership transfers to customer.
4. Operation and Maintenance: Long-term system upkeep, monitoring, and performance optimization for electrical installations and energy systems.
5. Electrical Construction and Design: Infrastructure design and construction services for power systems in new builds and retrofits.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Diotech operates as an energy systems integrator delivering end-to-end energy solutions from design and construction through operation and maintenance. Core offerings include grid-scale and commercial-industrial battery energy storage systems (BESS), solar power plant installation and service contracts, complete lighting services (LED upgrades, motion-based controls, Lighting as a Service), EV charging infrastructure, and electrical construction and design. The portfolio is supported by the proprietary Diotech FLEX controller and custom SCADA system for monitoring and energy market participation.

Product overview

Diotech is a systems integrator offering an integrated portfolio of energy solutions: battery energy storage systems (BESS) for grid-scale and commercial-industrial applications, solar power plants (including solar-as-a-service), lighting services (via Diotech Nord sub-brand), EV charging infrastructure, and electrical construction/design. The company provides end-to-end solutions from design and construction to operation and maintenance, supported by proprietary Diotech FLEX control technology. Diotech Group includes subsidiaries Diotech Electric, Diotech Nord, Solar Wheel (Sunecor), and Solar Rent OÜ, operating in Estonia, Latvia, Lithuania, and Poland.

Differentiator

Problem solved

Functional benefit

Brands

• DIOTECH: Primary company brand for energy solutions including storage, solar, and electrical services.
• DIOTECH ELECTRIC
• DIOTECH NORD
• SOLAR WHEEL

Products and services

• Battery Energy Storage Systems (BESS) Grid-scale and commercial-industrial battery storage solutions including system integration, control logic development, and turnkey delivery. Operates systems via the proprietary Diotech FLEX controller for monitoring and frequency market participation. Targets utility companies, industrial facilities, and commercial real estate for grid stabilization, renewable integration, energy cost optimization, and power exchange trading.
• Solar Power Plants Development, installation, and integration of photovoltaic installations including EPC services, conversion of existing plants to controllable capacity using battery storage, and a solar-as-a-service model with 7-10 year contracts. Has built over 1,000 solar power plants.
• Lighting Services Complete lighting solutions from design to component supply, electrical systems construction, and after-sales service. Includes LED upgrades, motion-based control systems (using Comlight technology, providing up to 80% additional savings beyond LED), intelligent lighting management, and a Lighting as a Service (LaaS) business model with zero upfront investment. Delivered via subsidiary Diotech Nord OÜ for commercial buildings, public facilities, healthcare, hospitality, logistics, and municipal customers.
• EV Charging Solutions Electric vehicle charging infrastructure deployment including charging stations and associated systems integration. Targets commercial sites, residential developments, and fleet operators requiring integrated charging solutions alongside broader energy infrastructure.
• Electrical Construction and Design Infrastructure planning and technical support for power systems in new builds and retrofits, including electrical system design and construction services. Delivered via subsidiary Diotech Electric OÜ. Underpins the company's ability to deliver turnkey energy projects from grid connection through system commissioning.
• Operation and Maintenance Services Long-term system upkeep, monitoring, and performance optimization for electrical installations including battery storage systems. Includes ongoing monitoring, performance optimization, and lifecycle support for BESS, solar plants, and lighting infrastructure on multi-year service contracts.

Quantifiable outcome

• Up to 80% additional savings from motion-based lighting controls combined with LED upgrades
• +3 more outcomes

Named customers10 records

Segments5 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Nine partnerships are on record, tiered core, major and minor.

• Transcom AScoreStrategic or Co-development Partner · 16 February 2026Co-developer of Zirgu BESS project (100 MW/200 MWh in Tsirguliina, Valga County). Diotech holds shareholder interest; Transcom AS is co-owner. Joint venture to build Estonia's largest 100% Estonian capital battery industrial park.
• Zirgu Bess OÜmajorStrategic or Co-development Partner · 16 February 2026Project company developing the Zirgu BESS battery storage facility. Diotech and Transcom AS are shareholders. Purchased development from LignaMets OÜ.
• LignaMets OÜminorOthers · 16 February 2026Sold Zirgu BESS development project to Zirgu Bess OÜ. Decision based on local buyer's clear vision, execution capability, and readiness to implement on schedule.
• Estonian Business and Innovation Agency (EIS)minorStrategic or Co-development Partner · 16 February 2026Government agency facilitating international partnerships. Organized South Korea business visits that helped Diotech establish contacts with LG Energy Solution for battery technology.
• SMA AGcoreTechnology or Integration · 18 July 2025Battery system supplier for Poland battery park project with Energix Polska. Provides inverters and integrated battery solutions.
• Energix PolskamajorStrategic or Co-development Partner · 18 July 2025Lead developer of 56 MWh battery park in Nowe Czarnowo, Poland. Diotech provides system integration, control logic, and technical coordination for the project. First major project establishing Diotech's presence in the Polish energy market.
• LG Energy SolutioncoreTechnology or Integration · 2 February 2024Primary battery technology supplier for Diotech's large-scale storage projects. Supplies LFP battery cells and systems for Auvere (53.1 MWh), Poland (56 MWh), and Zirgu (100 MW/200 MWh) projects. Technology partnership enabling Diotech to deliver grid-scale BESS across the Baltics.
• Power ElectronicscoreTechnology or Integration · 2 February 2024Inverter manufacturer supplying equipment for large-scale battery storage projects. Partner for Auvere BESS project providing critical power conversion technology.
• Enterprise Estonia (EAS)coreStrategic or Co-development Partner · 1 December 2021Government development agency providing grant financing for Diotech's growth plan. Phase II support of EUR 318,408.75 for quality management system development, process digitization, and competency building (Nov 2021 - Apr 2023). Earlier Phase I support of EUR 166,500 for export market entry and service portfolio expansion.

Scale indicators14 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• Ingeteam: Spanish provider of power conversion and BESS integration solutions for renewable and storage projects across Europe and Latin America — similar EPC + proprietary controls model.
• Sungrow: Global leader in solar inverters and BESS integration offering turnkey energy storage solutions for utility and C&I markets — comparable systems integration profile.
• Fluence Energy: Global pure-play BESS systems integrator jointly backed by Siemens and AES, active in utility-scale and C&I battery storage projects worldwide — Diotech's closest direct competitor in business model.
• SMA Solar Technology: German inverter manufacturer and BESS solutions provider, already a Diotech technology partner for the Poland project — directly overlaps in solar+storage system integration.
• Wärtsilä Energy Storage: Nordic-headquartered energy systems integrator with a strong BESS and grid balancing portfolio across Europe and the Americas — directly comparable to Diotech as a utility-scale storage integrator.

Broad incumbents

• Schneider Electric: Diversified energy management and storage player offering integrated BESS and microgrid solutions as part of a broader portfolio — overlaps with Diotech in C&I and grid-edge.
• Tesla Energy: Operator of Megapack utility-scale BESS with global deployment scale and integrated hardware/software — broader incumbent competing for the same utility tenders as Diotech.
• Hitachi Energy: Global grid equipment and energy storage solutions provider with deep utility relationships — competes in large-scale BESS tenders where Diotech also bids.

Regional players

• Sunly: Baltic-focused renewable energy and storage developer active in Estonia, Latvia, Lithuania, and Poland — comparable regional platform in distributed solar and battery storage.
• Evecon: Estonian renewables and battery storage developer active across the Baltics — directly comparable as a Baltic-headquartered player operating in the same geography.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks7 records

Key highlights7 records

Customer concentration

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Subsidiaries5 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 Diotech