What Suur-Savon Sähkö does

Suur-Savon Sähkö Oy is a privately held Finnish regional energy group headquartered in Mikkeli, operating primarily in the Järvi-Suomi (Lake Saimaa) region of Eastern and Central Finland. Founded in 1946 and majority-owned by 15 local municipalities (60%), the group provides regulated electricity distribution through subsidiary Järvi-Suomen Energia across a 28,500 km network serving 101,893 customers, district and ground-source heating under the Lempeä Lämpö brand across a 160 km heating network serving 1,527 customers, fiber optic connections through Järvi-Suomen Valokuitu, and industrial-scale solar EPC services through Solarigo Systems. The group also owns and operates hydroelectric plants at Vaajakoski and Kissakoski, equity-stakes in Finnish and Swedish production assets via Kymppivoima (20%) and Voimapiha (7.8%), and holds a 20.8% stake in national retailer Oomi Oy. Across 2025, it operated with approximately 120 parent employees (174 consolidated), reported €402.6M in revenue, €43.5M in result before appropriations and taxes, and €82.8M in investments.

Revenue is generated through a mix of regulated network tariffs (subscription/recurring), turnkey heating and solar EPC contracts (one-time plus multi-year service agreements), fiber subscription fees, and equity-method contributions from associates including Oomi and Kymppivoima. Distribution is multi-channel: direct field sales handle enterprise and municipal customers for grid connections, district heating, solar and fiber; while self-service digital channels serve residential customers via Oomi and Järvi-Suomen Energia service portals. The group's go-to-market combines a sales-led B2B motion with self-serve consumer channels, supported by an external field maintenance partner (Elvera, 49.98%-owned) and Enerva for centralized grid control operations.

In 2024-2025 the group restructured by transferring the Lumme Energia electricity supply business out of the group, materially reducing consolidated revenue but improving profitability and lowering market exposure. The simplification was followed by commissioning the 9 MWp Ohrasuo solar park (subsidiary Järvi-Suomen Aurinko Oy) and the 5 MWp Hirvensalmi park, a smart meter rollout to all customers by end-2026, and group-wide ISO 45001, ISO 14001 and ISO 27001:2022 certifications covering Suur-Savon Sähkö and its operating subsidiaries.

Name

Suur-Savon Sähkö

Legal name

Suur-Savon Sähkö Oy

Website

https://sssoy.fi

Company type

Private

Founded year

1946

Operating status

Operating

Headcount range

51–100 employees

Short description

Suur-Savon Sähkö Oy is a municipally-owned Finnish regional energy group providing regulated electricity distribution, district heating, fiber connectivity, and industrial solar EPC services across 15 municipalities in the Järvi-Suomi region of Eastern and Central Finland.

Ownership category

akta.pro rank

Product category

Regional Energy Distribution and Heating Services

NAICS

Electric Power Generation, Transmission and Distribution (2211), Solar Electric Power Generation (221114), Electric Power Transmission, Control, and Distribution (22112), Hydroelectric Power Generation (221111)

SIC

Electric Services (4911), Electric & Other Services Combined (4931)

akta.pro primary industry

Energy Management Systems & Plant Controllers (PPC, AGC Participation, Curtailment Control) (EUAMAIAI)

akta.pro secondary industries

DERMS Platforms & Utility Integration (ADMS/SCADA Integration, Hosting Capacity) (EUAFAHAF), Interconnection, Permitting & Grid Services for DERs (EUAMAJAH), Demand Response & Load Flexibility Services (EUAMAJAF)

Keywords

• Electricity distribution services
• District heating solutions
• Industrial solar parks
• Fiber optic broadband
• Renewable energy generation

Headquarters

HQ city

Mikkeli

HQ country

Finland

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Electricity Distribution Network Services: Regulated electricity distribution services through Järvi-Suomen Energia to over 101,893 customers across 28,500 km of network in the Järvi-Suomi region. Revenue derived from network tariffs regulated by the Energy Authority. This is the core regulated infrastructure business.
2. District Heating: District heating (Lempeä Kaukolämpö) and ground source heating (Lempeä Maalämpö) solutions sold as turnkey services to residential customers, housing companies, municipalities and businesses. Revenue from heating service contracts and installation services.
3. Solar Power Generation and Industrial Solar Parks: Solarigo Systems subsidiary designs and builds industrial-scale solar parks and property-specific solar installations for businesses as total service. Suur-Savon Sähkö also invests in own solar parks (e.g., Ohrasuo 9 MWp, Hirvensalmi 5 MWp) through Järvi-Suomen Aurinko Oy. Revenue from solar park development, EPC contracts, and ownership of generation assets.
4. Electricity Sales (Oomi): Through 20.8% owned associate Oomi Oy, the group provides nationwide electricity supply services to approximately 800,000 consumer and business customers. Note: Lumme Energia business was transferred out of the group in 2025, reducing consolidated revenue significantly.
5. Fiber Optic Connections: Järvi-Suomen Valokuitu provides fiber optic connections and internet services in the Järvi-Suomi area. Revenue from connection fees and recurring internet service subscriptions.
6. Power Production Ownership: Owns hydroelectric plants (Vaajakoski, Kissakoski) and holds ownership stakes in Kymppivoima (20%) providing power production shares from wind (1/3), nuclear (1/3 via Olkiluoto), hydro, and wood-based fuels (1/3). Also 7.8% in Voimapiha for Swedish hydro.

Pricing tiers

Go-to-market motion3 records

Distribution channels5 records

Marketing channels6 records

Core offering

Suur-Savon Sähkö is a regional energy group providing regulated electricity distribution across a 28,500 km network in Järvi-Suomi, district and ground-source heating solutions, industrial solar park EPC through Solarigo Systems, fiber optic broadband through Järvi-Suomen Valokuitu, and data-driven grid maintenance services through Evision. The group also generates and procures renewable electricity through its own hydroelectric (Vaajakoski, Kissakoski) and solar (Ohrasuo 9 MWp, Hirvensalmi 5 MWp) assets, supplemented by production shares in wind, nuclear, hydro, and wood-fuel generation through Kymppivoima.

Product overview

Suur-Savon Sähkö is a regional energy group operating primarily in Lake Finland (Järvi-Suomi), Finland. The company offers a diversified portfolio of energy products and services through multiple subsidiaries: Järvi-Suomen Energia handles electricity grid services; Lempeä Lämpö provides heating solutions (district heating and ground heat); Järvi-Suomen Valokuitu delivers fiber optic connectivity; Evision offers data-driven maintenance and fault detection services; and Solarigo Systems builds industrial-scale solar parks. Associated company Oomi provides nationwide energy services. The group also owns hydroelectric plants (Kissakoski and Vaajakoski) and holds production shares in wind, nuclear, and hydro power through various ownership arrangements.

Differentiator

Problem solved

Functional benefit

Brands

• Solarigo Systems: Industrial-scale solar power plant construction and operation company serving clients throughout Finland.
• Järvi-Suomen Energia
• Lempeä Lämpö
• Järvi-Suomen Valokuitu
• Evision
• Lumme Energia

Products and services

• Electricity distribution network services (Järvi-Suomen Energia) Regulated electricity distribution and grid services for residential, commercial, and municipal customers in Järvi-Suomi, including grid service contracts, outage notifications, and industrial and production connections; service offered through Järvi-Suomen Energia Oy.
• District and ground source heating (Lempeä Lämpö) Turnkey district heating and ground source heat pump installations and ongoing heat supply for housing companies, property owners, businesses, cities, municipalities, and single-family homes in Järvi-Suomi, delivered through Lempeä Lämpö Oy.
• Industrial and property solar EPC service (Solarigo Systems) Total-service solar power solution delivering engineering, procurement, construction, and operations for industrial solar parks and property-specific solar installations to corporate customers across Finland, marketed as one of Finland's leading large-scale solar providers.
• Fiber optic broadband (Järvi-Suomen Valokuitu) Fiber optic broadband connections and internet services delivered over the group's regional fiber network to households and businesses in Järvi-Suomi, with connection fees and recurring internet subscriptions.
• Data-driven grid maintenance and fault detection (Evision) AI and drone-based predictive maintenance, aerial inspection, and fault localization service for electricity network operators; offered to other Finnish grid companies as a B2B service, supported by centralized control through partner Enerva.
• Ohrasuo solar park Group-owned industrial solar power plant in Savonlinna producing clean electricity for Eastern Finland, developed through Järvi-Suomen Aurinko Oy with Solarigo Systems as main contractor; equivalent in scale to about 350 single-family homes' annual electricity consumption.
• National electricity supply service (Oomi, associate company) National retail electricity supply offered through 20.8%-owned associate Oomi Oy to residential and business customers across Finland via digital self-service, functioning as the group's national retail electricity arm.

Quantifiable outcome

• Electricity distribution network 28,500 km serving 101,893 customers across 15 municipalities in Järvi-Suomi
• +3 more outcomes

Named customers4 records

Segments4 records

Ideal customer profiles5 records

Technology focussed No

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 and minor.

• Kymppivoima OycoreStrategic or Co-development PartnerSuur-Savon Sähkö holds 20% in Kymppivoima Oy, a power production and procurement specialist organization owned by nine electricity companies. Kymppivoima provides production shares from 19 different power plants including wind (Lestijärvi 69-turbine park), nuclear (all three Olkiluoto reactors), hydro, and wood-based fuels. This is a core strategic partnership for diversified renewable energy supply.
• Järvi-Suomen Voima OycoreStrategic or Co-development Partner50% owned joint venture producing steam and electricity in Ristiina and district heating in Savonlinna. Also 50% ownership of two CHP plants with UPM-Kymmene through Järvi-Suomen Voima.
• Oomi OycoreStrategic or Co-development PartnerSuur-Savon Sähkö holds 20.8% in Oomi, a national energy service company. Oomi provides electricity supply services to approximately 800,000 residential and business customers across Finland, functioning as the group's national retail electricity arm.
• Elvera OycoreStrategic or Co-development Partner49.98% owned company providing field planning, network construction, maintenance and fault repair services for electricity networks. Key operational partner for Järvi-Suomen Energia's network maintenance.
• Suomen Energiavarat OyminorStrategic or Co-development Partner22.9% ownership in Suomen Energiavarat Oy, which develops Vapo Oy's operations and ensures domestic energy resource availability.
• EnervacoreTechnology or IntegrationNetwork operations and monitoring for electricity grid is centralized in Enerva, a company owned by electricity distribution companies. Manages grid control center operations for Järvi-Suomen Energia.
• Solarigo Systems OycoreStrategic or Co-development PartnerSolarigo Systems is a wholly-owned subsidiary designing and building industrial solar parks and property-specific solar installations across Finland. Also operates Järvi-Suomen Aurinko Oy which owns the Ohrasuo solar park.
• Järvi-Suomen Aurinko OycoreStrategic or Co-development PartnerSubsidiary owning solar parks in Järvi-Suomi including the 9 MWp Ohrasuo solar park in Savonlinna. Responsible for solar asset ownership and development in the region.
• VoimapihaminorStrategic or Co-development Partner7.8% ownership in Voimapiha which delivers energy from Swedish hydroelectric production.

Scale indicators11 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• Helen Oy: Helsinki-based energy utility providing electricity, district heating, and cooling to the capital region. Overlaps with Suur-Savon Sähkö in district heating and electricity supply, but at significantly larger scale and within a metro footprint.
• Fortum Oyj: Major Nordic energy company headquartered in Finland with generation, distribution, and district heating across the Nordics. Overlaps with Suur-Savon Sähkö in hydro generation, district heating, and nuclear/wind exposure via joint ventures, but at vastly larger scale.

Direct peers

• KSS Energia Oy: Regional energy company operating in the Kymenlaakso region of southeastern Finland with electricity distribution and energy services. Similar scale and integrated service offering makes it a strong direct comparable.
• Turku Energia Oy: Regional Finnish energy company providing electricity distribution, district heating, and energy services in the Turku region. Similar size, integrated service portfolio, and municipal ownership characteristics make it a strong comparable.
• Nivos Oy: Regional Finnish energy company operating in the Mäntsälä and surrounding regions with electricity distribution, fiber optic services, and district heating. Comparable integrated energy-and-fiber model with similar customer scale.
• Savon Voima Oy: Regional Finnish energy group serving Kuopio and surrounding areas with electricity distribution, district heating, and energy services. Closest geographic and scale comparable to Suur-Savon Sähkö in the same Eastern Finland energy market.
• Caruna Oy: Finland's largest electricity distribution system operator serving ~480,000 customers. Closely comparable regulated DSO business model, with similar exposure to weather resilience investment, smart meter rollout, and Energy Authority oversight.
• Napapiirin Energia ja Vesi Oy: Regional Finnish energy and water utility serving the Rovaniemi area with electricity distribution, district heating, and water services. Comparable integrated municipal-utility model and customer scale to Suur-Savon Sähkö.
• Keravan Energia Oy: Smaller regional Finnish energy company serving the Kerava region with electricity distribution and district heating. Comparable integrated service model, though at smaller scale than Suur-Savon Sähkö.
• Elenia Oy: One of Finland's two largest distribution system operators, serving ~430,000 customers. Suur-Savon Sähkö's 49.98% stake in Elvera Oy — which serves Elenia — also creates direct operational linkage, making Elenia a key comparable for regulated DSO economics.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/suursavonsahko
• LinkedInlinkedin.com/company/suur-savon-s-hk-oy

Revenue estimate

Valuation estimate

Number of profiles

Profiles14 records

Subsidiaries11 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 Suur-Savon Sähkö