Trondheim Energi
Norwegian electricity, power-grid, hydropower, and district-heating company based in Trondheim.
Last updated August 25, 2026
AI crawler reads
No AI crawler has read this profile since Oct 28, 2026.
History
Trondheim Energi traces its origins to 1901, when Trondhjems Elektricitetsværk og Sporvei was established in Trondheim to develop electricity generation at Øvre Leirfoss and operate the city’s tramway. The organization therefore began as a combined electrical-utility and urban-transport undertaking. In 1921, these functions were separated: Trondheim Energiverk became responsible for electricity activities, while Trondheim Sporvei assumed responsibility for tram operations. The electricity business developed generation and network infrastructure serving Trondheim and nearby municipalities. In 1952, Trondheim Energiverk entered into an agreement with Stockholm Elverk concerning cooperation in the construction of the Nea power plant. The agreement also included electricity exchanges with Sweden, connecting the company to wider Nordic power cooperation. Over time, the company’s generation portfolio came to include fourteen hydroelectric power plants in the Nea and Nidelva systems, as well as partial ownership of five plants in the Orkla Valley. District heating became a second major infrastructure business. In 1982, Trondheim’s municipal council decided that a district-heating system should be built. Operations began in 1986, giving the company a thermal-energy business in addition to electricity generation, electricity distribution, and grid ownership. The company owned the power grid and district-heating system serving Trondheim Municipality and Klæbu Municipality. The corporate form changed during the 1990s. Trondheim Energiverk was reorganized as a limited company in 1997 and as a corporation in 1999. In 2002, Trondheim city council sold the company to Statkraft. This brought the locally rooted utility into the ownership structure of one of Norway’s largest state-owned energy groups. The group adopted the Trondheim Energi name in 2007. Reference figures for 2006 indicate the scale of the business during the Statkraft period. Electricity production totaled 2,865 GWh, while district-heating production reached 451 GWh. The company was associated with approximately 82,000 electricity customers, 93,000 grid customers, and 2,400 district-heating customers. These figures distinguish its retail electricity relationships from its broader grid-customer base. In 2010, Statkraft sold Trondheim Energi to TrønderEnergi. The sale shifted the company from national state-group ownership to ownership by a regional energy company. The supplied reference material does not document the precise post-acquisition corporate structure, whether all activities continued under the Trondheim Energi name, or the date on which any standalone entity or brand may have ceased operating. Accordingly, the historical record supports describing Trondheim Energi as a former or acquired Norwegian utility business, while its current independent status remains unconfirmed.
- 2010
Sold to TrønderEnergi
[1]TrønderEnergi bought Trondheim Energi from Statkraft.
- 2007
Group adopts the Trondheim Energi name
[1]The group changed its name to Trondheim Energi.
- 2006
Reported electricity and heating output
[1]Reference figures recorded electricity production of 2,865 GWh and district-heating production of 451 GWh, alongside approximately 82,000 electricity customers, 93,000 grid customers, and 2,400 district-heating customers.
- 2002
Acquired by Statkraft
[1]Trondheim city council sold the company to Statkraft.
- 1999
Reorganized as a corporation
[1]The company underwent a further corporate reorganization.
- 1997
Reorganized as a limited company
[1]The utility was reorganized as a limited company.
- 1986
District-heating operations begin
[1]The district-heating system began operating in Trondheim.
- 1982
District-heating system approved
[1]Trondheim’s municipal council decided to build a district-heating system.
- 1952
Nea power cooperation agreement
[1]Trondheim Energiverk and Stockholm Elverk agreed to cooperate on the Nea power plant and to exchange electricity with Sweden.
- 1921
Electricity and tramway operations separated
[1]The original organization was divided into Trondheim Energiverk, responsible for electricity, and Trondheim Sporvei, responsible for the tramway.
Products and positioning
A municipally rooted regional utility that combined hydropower generation, electricity-grid operation, electricity supply, and district heating, later operating under ownership by national and regional energy groups.
Electricity generation
Hydroelectric power generation
Hydroelectric generation was a core part of Trondheim Energi’s asset base. The company owned fourteen hydroelectric plants in the Nea and Nidelva systems and held partial interests in five plants in the Orkla Valley. These facilities supplied the company’s electricity-production business and connected it to the hydropower resources of central Norway.
Utility infrastructure
Electricity distribution and power grid
Trondheim Energi owned and operated the electricity grid serving Trondheim Municipality and Klæbu Municipality. Its grid business supported approximately 93,000 grid customers in the 2006 figures cited by reference material, distinct from the company’s electricity-supply customer relationships.
Retail electricity
Electricity supply
The company supplied electricity to customers in its regional market while also generating power through its hydropower portfolio. Reference material associated Trondheim Energi with approximately 82,000 power customers in 2006.
Thermal energy · 1986
District heating
Trondheim Energi operated Trondheim’s district-heating system after the municipal decision to build it in 1982 and the start of operations in 1986. District heating produced 451 GWh in 2006 and served approximately 2,400 customers according to the cited reference material.
Brand decisions
2010
Sale from Statkraft to TrønderEnergiM&ABackground
Statkraft owned Trondheim Energi after acquiring it from Trondheim municipality in 2002.
Action taken
Statkraft sold Trondheim Energi to TrønderEnergi.
Aftermath
Ownership moved from a national state-owned energy group to a regional energy company. The available material does not specify the subsequent standalone legal or branding arrangements.
2007
Adoption of the Trondheim Energi group nameStrategyBackground
Following the company’s integration into Statkraft’s ownership structure, the group changed its name in 2007.
Action taken
The group adopted Trondheim Energi as its name.
Aftermath
The Trondheim Energi identity became the principal name associated with the group’s regional electricity and district-heating operations until the later sale to TrønderEnergi.
2002
Municipal sale to StatkraftM&ABackground
Trondheim Energi had been reorganized into a corporate structure during the 1990s. In 2002, Trondheim city council transferred ownership of the company to Statkraft.
Action taken
The municipality sold Trondheim Energi to Statkraft, making it a subsidiary of the national energy group.
Aftermath
The company operated under Statkraft ownership until Statkraft sold it to TrønderEnergi in 2010.
Recent events
- 2010
TrønderEnergi acquires Trondheim Energi from Statkraft[1]
M&A
TrønderEnergi bought Trondheim Energi from Statkraft. The available reference does not provide transaction terms or describe the subsequent legal status of the Trondheim Energi brand.
- 2007
Trondheim Energi name adopted by the group[1]
Other
The group changed its name to Trondheim Energi, consolidating the identity associated with the company’s electricity and heating activities.
- 2002
Trondheim city council sells Trondheim Energi to Statkraft[1]
M&A · Other
Trondheim city council sold the energy company to Statkraft, transferring ownership from the municipality to Norway’s state-owned energy group.
Sources1 sources
Cite this profile: Cite the canonical profile. /brand-wiki/trondheim-energi · Editorial policy · How profiles are compiled