Lahti Energia

What Lahti Energia does

Lahti Energia Oy is a municipally owned Finnish energy company headquartered in Lahti, wholly owned by the City of Lahti (Lahden kaupunki). It produces and distributes district heating (kaukolämpö) to more than 90% of Lahti residents with 99.98% supply reliability, and operates a 4,897 km electricity distribution network serving Lahti, Hollola, Asikkala, Iitti, and Nastola through its wholly owned subsidiary Lahti Energia Sähköverkko Oy. District heating is generated primarily at the Kymijärvi power plants from a diversified mix of biofuels, waste-derived fuels, electricity, and combined heat and power (CHP), with 90% of district heating coming from renewable or fossil-free sources in 2025 and natural gas/oil accounting for less than 5%.

The company's underlying technology stack combines conventional CHP with two pioneering thermal energy storage assets: a 750 MWh / 60 MW hot-water district-heating battery (kaukolämpöakku / vesiakku) at Kymijärvi coming online in March 2026, and the world's largest sand-based thermal battery (250 MWh, 2 MW output, ~600°C) at Väätäksy being co-developed with Polar Night Energy for summer 2027. Electric boilers commissioned at Kymijärvi (November 2024) and under construction at Teivaanmäki enable low-price-electricity-to-heat arbitrage and grid balancing. Customer-facing infrastructure includes the OmaWatti self-service portal and a rollout of approximately 90,000 Landis+Gyr smart meters between 2026 and 2028 to support 15-minute interval measurement, HAN port home automation integration, and automated outage reporting.

Lahti Energia generates revenue through regulated, publicly disclosed tariffs: one-time district heating connection fees (liittymismaksu), recurring district heating supply charges (held flat for 2026), and electricity distribution fees comprising fixed, power, and usage components. Customer segments span residential households (long-tail volume via OmaWatti), housing companies and property managers (taloyhtiöt), commercial and industrial users (with dedicated high-voltage connections for sites such as Fazer and the planned Lahti Kiveriö data centre), and property developers requiring new connections. Marketing is hybrid: direct-to-consumer for residential customers via the portal and local sponsorship, and sales-led enterprise engagement for industrial customers and large new connections.

Name

Lahti Energia

Legal name

Lahti Energia Oy

Website

https://lahtienergia.fi

Company type

Private

Founded year

1940

Operating status

Operating

Headcount range

251–500 employees

Short description

Lahti Energia is a City of Lahti-owned municipal utility producing district heating and operating electricity distribution across the Lahti region of Finland, serving over 90% of city residents, housing companies, and industrial customers via a regulated monopoly network and advanced thermal energy storage assets.

Ownership category

akta.pro rank

Product category

District Heating and Electricity Distribution Utilities

NAICS

Steam and Air-Conditioning Supply (221330), Electric Power Generation, Transmission and Distribution (2211)

SIC

Steam & Air-Conditioning Supply (4961), Electric Services (4911), Cogeneration Services & Small Power Producers (4991)

akta.pro primary industry

Commissioning, Testing & Energization Services (Pre-Commissioning, Grid Code Compliance) (EUAMAFAK)

akta.pro secondary industry

HVAC & Industrial Ventilation (Chillers, AHUs, Exhaust, Filtration) (EUAEAFAE)

Keywords

• District heating services
• Electricity distribution networks
• Thermal energy storage
• Municipal energy utility
• District cooling services

Headquarters

HQ city

Lahti

HQ country

Finland

HQ region

Europe

Offices5 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. District Heating Sales: Sale of district heating (kaukolämpö) to residential, commercial, and industrial customers. Revenue is generated through connection fees, usage-based heating charges, and fixed network fees. Over 90% of Lahti residents are served by district heating from Kymijärvi power plants.
2. Electricity Distribution (Network) Services: Electricity transmission and distribution through Lahti Energia Sähköverkko. Revenue comprises fixed fees, power fees, and variable distribution fees based on consumption and contracted capacity. Network serves Lahti and surrounding municipalities. Prices are regulated and publicly disclosed.
3. Electricity Meter Replacement Services: Free meter replacement service for customers performed by partner Eltel, funded through regulated network fees.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels8 records

Core offering

Lahti Energia produces and supplies district heating (kaukolämpö) and operates regulated electricity distribution through its subsidiary Lahti Energia Sähköverkko Oy, serving residential, commercial, and industrial customers in Lahti and surrounding municipalities. The company also provides thermal energy storage (water battery and sand battery), district cooling, process energy, distributed energy production solutions, and inspection/maintenance services for heating equipment. Customer self-service is delivered via the OmaWatti online portal.

Product overview

Lahti Energia is a local, city-owned energy company in Lahti, Finland providing district heating (kaukolämpö) and electricity distribution (sähkönsiirto) services. The district heating network serves over 90% of Lahti residents with 99.98% supply reliability, with 90% of heating from renewable or fossil-free sources. The electricity distribution network spans 4,897 km serving Lahti and surrounding municipalities. The company is expanding into thermal energy storage with two battery systems: a water battery (kaukolämpöakku/vesiakku) at Kymijärvi (750 MWh, operational March 2026) and a sand battery (hiekka-akku) in Vääksy (250 MWh, completion 2027). Customer services include the OmaWatti portal for consumption monitoring, smart meter replacements (2025-2028), and inspection/maintenance services. The company is transitioning to 15-minute electricity metering intervals (varttitase) to support Europe's energy market reforms.

Differentiator

Problem solved

Functional benefit

Brands

• OmaWatti: Customer self-service portal for tracking energy consumption, updating customer information, and viewing bills.

Products and services

• District Heating (Kaukolämpö) Centralized heat production and underground pipeline distribution to homes, apartment buildings, and businesses in Lahti with 99.98% supply reliability.
• Electricity Distribution (Sähkönsiirto) Regulated electricity transmission and distribution across a 4,897 km network (110 kV, 20 kV, 0.4 kV) covering Lahti, Hollola, Asikkala, Iitti, and Nastola.
• OmaWatti Customer Portal

Quantifiable outcome

• 99.98% district heating supply reliability
• +5 more outcomes

Named customers4 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Six partnerships are on record, tiered core and minor.

• Polar Night EnergycoreStrategic or Co-development Partner · 26 November 2025Polar Night Energy and Lahti Energia are co-developing the world's largest sand-based thermal energy storage (TES) project at Vääksy, Asikkala. The project has a capacity of 250 MWh thermal storage and 2 MW thermal output. Construction targets completion by summer 2027. The sand battery stores heat generated from low-cost electricity and releases it to Lahti Energia's district heating network, substituting natural gas and wood chips. Business Finland has granted energy funding to the project.
• Eltel NetworkscoreChannel Partner/ Reseller/ DistributorEltel performs electricity meter replacements (~90,000 meters 2026–2028), tree clearing and vegetation management along power line corridors, helicopter line trimming, and other field operations on behalf of Lahti Energia Sähköverkko. Eltel contacts customers to arrange meter replacement appointments, including evenings and weekends.
• Landis+GyrcoreTechnology or IntegrationLandis+Gyr supplies approximately 90,000 smart electricity meters being installed across the Lahti Energia Sähköverkko network between 2026 and 2028. New meters support 15-minute interval measurement, HAN port for home automation, automatic outage reporting, and enhanced data security.
• Lahti AquaminorStrategic or Co-development PartnerCoordination partner for infrastructure work. Lahti Aqua (water utility) and Lahti Energia collaborate on pipeline renovation projects such as the Jalkarannantie road area, where both district heating and water network renewals are carried out simultaneously to minimise disruption.
• Lahti BasketballminorGTM or Marketing PartnerLahti Basketball players feature in Lahti Energia's district heating maintenance awareness campaign video, highlighting the importance of timely heating equipment servicing.
• FC LahtiminorGTM or Marketing PartnerFC Lahti is a key local sports sponsorship partner. Lahti Energia participates in community events such as FC Lahti family days (e.g., Ascension Day event), using the platform to engage with local residents and discuss district heating topics.

Scale indicators11 records

Recent moves7 records

Expansion highlights6 records

Broad incumbents

• Caruna: Finland's largest electricity distribution network operator, serving ~480,000 customers. Comparable on the regulated electricity distribution business line through Lahti Energia Sähköverkko, though Caruna does not operate district heating.
• Fortum: Major Nordic energy company with large-scale district heating, power generation, and electricity distribution across Finland and the Nordics. Overlaps with Lahti Energia on heat production and grid operations but operates across many geographies and customer segments.
• Elenia: Major Finnish electricity distribution system operator serving ~435,000 customers. Directly comparable on the regulated network operator business model, with similar smart-meter rollouts and reliability metrics, though no district heating overlap.

Direct peers

• Turku Energia: City of Turku-owned energy utility supplying district heating and electricity distribution in the Turku region. Directly comparable in municipal ownership, integrated heating/grid model, and mid-sized Finnish city footprint.
• Tampereen Energia: Tampere-based municipal energy utility providing district heating and electricity distribution to the Tampere region. Comparable to Lahti Energia in scale, ownership structure, integrated heating-plus-grid business model, and Nordic decarbonization trajectory.
• Vantaan Energia: Vantaa municipal energy utility jointly owned by the City of Vantaa, providing district heating, electricity, and related services. Comparable municipal multi-utility with similar heating-network and grid-distribution footprint near a major Finnish urban area.
• Helen (Helsinki Energy): Municipal energy utility owned by the City of Helsinki providing district heating, electricity, and cooling services to the Helsinki metropolitan area. Closest analog as a Finnish municipally owned multi-utility serving a single urban region with combined heating and grid operations.

Regional players

• Göteborg Energi: Municipal energy company owned by the City of Gothenburg providing district heating, electricity distribution, and gas. Comparable integrated municipal utility model and decarbonization profile, with geographic separation from Lahti Energia's market.
• Stockholm Exergi: Municipal district heating and cooling utility owned by the City of Stockholm, Sweden. Highly comparable in business model (large-scale Nordic district heating, decarbonization roadmap, biomass conversion, thermal storage pilots) but operates in Sweden, not Finland.

Emerging players

• Polar Night Energy: Finnish technology company developing sand-based thermal energy storage systems and supplier of the Vääksy sand battery co-developed with Lahti Energia. Directly comparable through the proprietary thermal storage technology that is core to Lahti Energia's renewable integration strategy.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat6 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/lahtienergia
• YouTubeyoutube.com/@LahtiEnergiaOy
• Facebookfacebook.com/LahtiEnergia
• LinkedInlinkedin.com/company/1883488
• Instagraminstagram.com/lahtienergia

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries1 record

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments1 record

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Lahti Energia