Enersense International Oyj - EPC company profile

Enersense International Oyj — Turnkey high-voltage substations, grid connections and battery storage infrastructure

Enersense International Oyj is a Finnish lifecycle partner for energy transmission and generation, industrial energy transition, telecommunications and data centres. Its Power business designs, builds, commissions, maintains and modernises high-voltage infrastructure. Enersense explicitly offers turnkey EPC deliveries for 110 kV and 400 kV substations, including engineering, civil works, installation, testing and commissioning; it also delivers turnkey BESS solutions and grid connections. Procurement of long-lead items and GIS system interfaces may be agreed case by case, so final scope remains contract-specific.

• Legal name: Enersense International Oyj
• Headquarters: Pori, Finland
• Founded: 2005
• Official website: Enersense International Oyj
• URL: https://voltformer.com/epc-contractors/enersense
• Markdown: https://voltformer.com/epc-contractors/enersense.md
• JSON: https://voltformer.com/epc-contractors/enersense.json

CEO and leadership profile

Kari Sundbäck

Chief Executive Officer

Chief Executive Officer of Enersense International Oyj since 23 September 2024. Born in 1971, he holds an MSc in Engineering. He previously served as Caverion’s Executive Vice President for Services, Solutions, Digital and Sustainability, and held leadership roles at KONE and Nokia.

• In role since: 2024-09-23
• Sources checked: 2026-10-04
• Profile: Kari Sundbäck

Enersense · Group Leadership Team

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Engineering specializations

• 110 kV and 400 kV turnkey substations (AIS and GIS)
• High-voltage transmission and grid interconnections
• Turnkey battery energy storage system (BESS) delivery
• Substation and grid asset maintenance, upgrades and lifecycle services

Declared capabilities

• Basic and detailed engineering: Listed capability; confirm project-specific scope
• Procurement and supply: Listed capability; confirm project-specific scope
• Civil and structural construction: Listed capability; confirm project-specific scope
• Testing and commissioning: Listed capability; confirm project-specific scope
• High-voltage substation EPC: Listed capability; confirm project-specific scope
• Transmission lines: Listed capability; confirm project-specific scope
• Turnkey power plant EPC: Not listed
• Grid interconnection: Listed capability; confirm project-specific scope

Representative projects

Liepaja ESS battery storage park

• Capacity / scope: Full-scope BESS park plus 110 kV grid connection and 110/33 kV transformer; approx. €7 million contract
• Country: Latvia | Client: Liepaja ESS | Year: 2026 (scheduled)
• Description: Enersense received its first full-scope BESS park contract, covering site preparation, civil and electrical work, equipment installation, control building and final grid connection through a new 110 kV cable line. The February 2026 release scheduled completion during 2026; the award is a construction-and-installation delivery, not described as a battery-cell supply contract.
• Technologies: BESS, 110 kV grid connection, 110/33 kV transformer
• Original source: https://enersense.com/releases/enersense-to-deliver-its-first-full-scope-battery-energy-storage-park-in-latvia/

Kannisto wind farm BESS and turnkey substation

• Capacity / scope: 125 MW / 250 MWh BESS; turnkey substation extension and approx. 1 km medium-voltage cable
• Country: Finland | Client: OX2 | Year: Wind farm scheduled for commissioning in 2028
• Description: Enersense was contracted for the full BESS delivery from site preparation through installation and grid connection, as well as the previously agreed turnkey substation extension. Its scope includes earthworks, foundations, installation, transformer bay, medium-voltage switchgear and about one kilometre of cabling; OX2 is developing the wind farm.
• Technologies: BESS, 125 MW / 250 MWh, Substation and grid connection
• Original source: https://enersense.com/releases/enersense-wins-its-first-large-scale-battery-energy-storage-project-in-finland/

Herva 400/110 kV substation

• Capacity / scope: Main contractor for a 400/110 kV transformer substation and connected Herva–Nuojuankangas line; approx. €15 million contract
• Country: Finland | Client: Fingrid | Year: Scheduled through 2027
• Description: Enersense was selected as main contractor to build Fingrid’s Herva 400/110 kV substation in Ii, as part of a larger contract package, and is also constructing the connecting Herva–Nuojuankangas line. The disclosed contract value is approximately €15 million, with work expected to continue through 2027.
• Technologies: 400/110 kV substation, High-voltage transmission, Wind-farm grid connection
• Original source: https://enersense.com/releases/enersense-will-build-a-new-substation-in-herva-ii/

Technical services

• Turnkey substations: Primary and secondary engineering, civil works, equipment installation, testing, commissioning and documentation for 110 kV and 400 kV substations; selected long-lead procurement and GIS interfaces are agreed case by case.
• BESS and grid integration: Turnkey battery storage delivery combining engineering, substation integration, site and civil work, electrical installation, grid connection, commissioning and lifecycle services.
• High-voltage lines and connections: 110 kV and 400 kV overhead-line or underground-cable connections, from route design and permitting through construction, testing and commissioning.
• Lifecycle operations and maintenance: Preventive and corrective maintenance, modernisation, remote monitoring, control-room operations and fault response for substations, BESS and grid assets.

Standards and certifications

Official contacts

• Address: Konepajanranta 2, FI-28100 Pori, Finland
• Telephone: +358 29 020 011
• Official website: https://enersense.com/contact-us/

Reference statistics

• Revenue (2025): €307 million
• Employees (company profile): 1,500
• Founded: 2005
• Head office: Pori, Finland

Company and energy news

• Enersense selected to maintain 18 Fingrid substations in Lapland — 2026-09-22 · Markdown
• Enersense to build a 330/110 kV transmission line in Estonia — 2026-08-27 · Markdown
• Enersense to deliver high-voltage substation integration for atNorth — 2026-08-06 · Markdown
• Enersense to maintain and develop Elektrilevi’s Estonian network — 2026-03-06 · Markdown
• Enersense wins full delivery of a 125 MW / 250 MWh Kannisto battery — 2026-02-25 · Markdown
• Enersense to deliver Fingrid’s Nokia substation turnkey — 2025-10-30 · Markdown
• Enersense to build a 110 kV underground cable line in Tartu — 2025-10-24 · Markdown

Other languages

• en
• tr
• de
• ru
• es
• ar
• it
• pt

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