Our energy production methods
Herrfors’ electricity production consists of several energy sources – wind power, hydropower, thermal power and nuclear power – each playing its own role in our electricity generation. We produce electricity both in our own and partly owned power plants, responsibly and transparently.
Herrfors’ electricity production methods and energy mix
Herrfors’ electricity production is a diverse combination of several different energy sources. The majority of the electricity is produced using renewable methods. Herrfors’ production methods support climate goals and provide our customers with transparent, responsible, and locally produced electricity.
42,7%
12,3%
33,3%
11,7%
Sustainable and Transparent Electricity Production
Herrfors is committed to renewable energy and climate-responsible electricity generation. Our goal is to reduce the use of fossil fuels in electricity production to below 5% by the end of 2025. We make extensive use of renewable energy sources such as wind and water, and we are continuously developing our production towards even cleaner solutions.
Investments in Renewable Energy
We are building new wind farms and maintaining our own hydropower plants. We are also piloting the use of solar energy as part of our production.
Lower Emissions
The share of fossil fuels in our electricity production is decreasing. Our goal is to achieve nearly emission-free production by 2025.
Local and Transparent
Electricity is produced mainly in local power plants, and we communicate openly about where and how our electricity is generated. As our customer, you can, if you wish, follow the origin of our electricity production.
100% Renewable and Emission-Free
Wind power
Wind power is Herrfors’ most important form of electricity generation, and its role has grown rapidly. The kinetic energy of the wind is converted into electricity using large wind turbines. Herrfors owns several wind farms in the Ostrobothnia and Northern Ostrobothnia regions, where the excellent coastal wind conditions are fully utilized.
In 2024, wind power accounted for 42.7% of Herrfors’ total electricity production. Wind power is completely renewable and emission-free energy, making it a key part of Herrfors’ transition towards low-emission electricity production.
A Traditional and Efficient Method
Hydropower
Hydropower is a traditional and efficient way to produce renewable electricity. Flowing water drives turbines that convert kinetic energy into electricity. Herrfors owns several hydropower plants along the Ähtävänjoki River, as well as several partially owned hydropower plants across Finland. Their production accounts for about 12.3% of Herrfors’ total electricity generation.
The key advantage of hydropower is its flexibility—it can quickly respond to fluctuations in electricity demand. Hydropower also supports the variable production of wind and solar energy by serving as a stable balancing power source.
Producing Both Electricity and Heat
Thermal power
Thermal power remains a significant part of Herrfors’ production portfolio. Electricity is generated by burning wood, biofuels, peat, and sometimes waste. Herrfors mainly uses thermal power in combined heat and power production (CHP), which produces both electricity and heat to meet local needs.
In 2024, thermal power accounted for 33.3% of Herrfors’ total electricity production. Although some of the fuels used are fossil-based, Herrfors is continuously developing thermal power toward lower emissions, replacing peat with renewable alternatives and optimizing processes.
Consistent and Reliable Electricity Generation
Nuclear Power
Nuclear power brings stability and zero emissions to Herrfors’ electricity production. Herrfors is a shareholder in a Finnish nuclear power company, which gives access to nuclear energy that produces no carbon dioxide emissions during the production phase.
In 2024, nuclear power accounted for 11.7% of Herrfors’ total electricity production. Nuclear energy serves as baseload power—it generates electricity consistently around the clock and complements weather-dependent production methods such as wind and hydropower.
Jumikoski
Rakennusvuosi / modernisointivuosi: 1954 / 2021
Pudotuskorkeus: 96,00 m
Teho: 27.8 MW
Herrforsin omistusosuus: 0.5%
Olkiluoto-1,2,3
Rakennusvuosi / modernisointivuosi: 1978, 1980, 2023
Teho: 890 MW, 890 MW, 1600MW
Herrforsin omistusosuus: 0.2%, 0.2%, 0.2%
Ravola
Rakennusvuosi: 2016
Teho: 125 MW
Herrforsin omistusosuus: 0.1%
Puuska 1 & Puuskaa 2
Puuska 1:
Rakennusvuosi: 2010-2011
Teho: 28.8 MW
Herrforsin omistusosuus: 10,8%
Puuska 2:
Rakennusvuosi: 2015
Teho: 16.5 MW
Herrforsin omistusosuus: 10,8%
Vieskan voima
Rakennusvuosi: 1994
Teho: 6.5 MW
Herrforsin omistusosuus: 25.3%
Kaarannekoski
Rakennusvuosi / modernisointivuosi: 1954 / 2009-2010
Pudotuskorkeus: 16,00 m
Teho: 3 MW
Herrforsin omistusosuus: 0.25%
Jolmankoski
Rakennusvuosi: 1955
Pudotuskorkeus: 5,00 m
Teho: 0.5 MW
Herrforsin omistusosuus: 0.25%
Tornion voima
Rakennusvuosi: 2007
Teho: 37 MW
Herrforsin omistusosuus: 1%
Portimokoski
Rakennusvuosi: 1987
Pudotuskorkeus: 16,50 m
Teho: 10.5 MW
Herrforsin omistusosuus: 0.25%
Isohaara
Rakennusvuosi / modernisointivuosi: 1949 & 1993 / 2016-2017
Pudotuskorkeus: 12,20 m
Teho: 112.5 MW
Herrforsin omistusosuus: 0.5%
Raasakka
Rakennusvuosi / modernisointivuosi: 1971 / 1997
Pudotuskorkeus: 21,00 m
Teho: 64.3 MW
Herrforsin omistusosuus: 0.5%
Maalismaa
Rakennusvuosi / modernisointivuosi: 1967 / 2009-2011
Pudotuskorkeus: 18,30 m
Teho: 38.6 MW
Herrforsin omistusosuus: 0.5%
Kierikki
Rakennusvuosi / modernisointivuosi: 1965 / 2005-2007
Pudotuskorkeus: 18,20 m
Teho: 37.5 MW
Herrforsin omistusosuus: 0.5%
Pahakoski
Rakennusvuosi / modernisointivuosi: 1961 / 2011-2013
Pudotuskorkeus: 20,50 m
Teho: 42.4 MW
Herrforsin omistusosuus: 0.5%
Haapakoski
Rakennusvuosi / modernisointivuosi: 1963 / 2007-2009
Pudotuskorkeus: 16,00 m
Teho: 32.6 MW
Herrforsin omistusosuus: 0.5%
Kaitfors
Rakennusvuosi: 1981
Pudotuskorkeus: 20,00 m
Teho: 7.4 MW
Herrforsin omistusosuus: 61.4%
Herrfors
Rakennusvuosi / modernisointivuosi: 1962 / 2008
Pudotuskorkeus: 3,50 m
Teho: 0,60 MW
Herrforsin omistusosuus: 100%
Långfors
Rakennusvuosi: 1983
Pudotuskorkeus: 5,00 m
Teho: 1 MW
Herrforsin omistusosuus: 100%
Kattilakoski
Rakennusvuosi / modernisointivuosi: 1979 / 2021
Pudotuskorkeus: 9,00 m
Teho: 2.5 MW
Herrforsin omistusosuus: 100%
Finnholm
Rakennusvuosi / modernisointivuosi: 1958 / 2009
Pudotuskorkeus: 4,50 m
Teho: 1.1 MW
Herrforsin omistusosuus: 100%
Björkfors
Rakennusvuosi: 1932 & 1964
Pudotuskorkeus: 7,00 m
Teho: 1.3 MW
Herrforsin omistusosuus: 100%
Kimo
Rakennusvuosi: 2008
Pudotuskorkeus: 10,50 m
Teho: 0.1 MW
Herrforsin omistusosuus: 100%
Harjavalta
Rakennusvuosi / modernisointivuosi: 1939 / 2014
Pudotuskorkeus: 26,40 m
Teho: 105 MW
Herrforsin omistusosuus: 0.1%
Melo
Rakennusvuosi / modernisointivuosi: 1971 / 1998-1999, 2014-2015
Pudotuskorkeus: 19,70 m
Teho: 67.9 MW
Herrforsin omistusosuus: 0.5%
Ahlholmens Kraft
AK1
Rakennusvuosi: 1991
Teho: 25 MW
Herrforsin omistusosuus: 50%
AK2
Rakennusvuosi: 2001
Teho: 240 MW
Herrforsin omistusosuus: 50%
Kopsa 2
Rakennusvuosi: 2014
Teho: 33 MW
Herrforsin omistusosuus: 23%
Parhalahti
Rakennusvuosi: 2022
Teho: 56 MW
Herrforsin omistusosuus: 23%
Ristiveto
Rakennusvuosi: 2012
Teho: 13,8 MW
Herrforsin omistusosuus: 25,3%
Kaukanen
Rakennusvuosi: 2024
Teho: 48 MW
Herrforsin omistusosuus: 15.2%
Hankila
Rakennusvuosi: 2022
Teho: 44.8 MW
Herrforsin omistusosuus: 23%
Keso
Rakennusvuosi: 2023
Teho: 42 MW
Herrforsin omistusosuus: 15.9%
Torkkola
Rakennusvuosi: 2015
Teho: 52.8 MW
Herrforsin omistusosuus: 0.5%
Santavuori
Rakennusvuosi: 2016
Teho: 56.1 MW
Herrforsin omistusosuus: 1.6%
Norrskogen
Rakennusvuosi: 2023
Teho: 102 MW
Herrforsin omistusosuus: 1,2%
Paskoonharju 1 & Paskoonharju 2
Paskoonharju 1:
Rakennusvuosi: 2018
Teho: 6.9 MW
Herrforsin omistusosuus: 1,3%
Paskoonharju 2:
Rakennusvuosi: 2015
Teho: 117.6 MW
Herrforsin omistusosuus: 1,2%
Metsälä
Rakennusvuosi: 2018
Teho: 117.3 MW
Herrforsin omistusosuus: 1.2%
Hietakangas
Rakennusvuosi: 2025
Teho: 5 MW
Herrforsin omistusosuus: 23%
Heinineva
Rakennusvuosi: 2025
Teho: 86 MW
Herrforsin omistusosuus: 0,8%
Sähkövarasto
Where Herrfors Produces Electricity
![Blue icon]()
Hydropower![Green icon]()
Wind power![Black icon]()
Nuclear power![Orange icon]()
Thermal power![Bright orange icon]()
Solar power![Grey icon]()
Battery storage
Hydropower
Wind power
Nuclear power
Thermal power
Solar power
Battery storage| Power plant | Year built | Capacity | Herrfors’ Ownership Share |
|---|---|---|---|
| Ristiveto | 2012 | 13,8 MW | 25,3% |
| Kopsa 2 | 2014 | 33 MW | 23,0% |
| Parhalahti | 2022 | 56 MW | 23,0% |
| Hankila | 2022 | 44,8 MW | 23,0% |
| Keso | 2023 | 42,0 MW | 15,9% |
| Kaukanen | 2024 | 48 MW | 15,2% |
| Puuska 1 | 2010-2011 | 28,8 MW | 10,8% |
| Puuska 2 | 2015 | 16,5 MW | 10,8% |
| Paskoonharju 1 | 2018 | 6,9 MW | 1,3% |
| Paskoonharju 2 | 2022 | 117,6 MW | 1,2% |
| Torkkola | 2015 | 52,8 MW | 0,5% |
| Metsälä | 2018 | 117,3 MW | 1,2% |
| Santavuori | 2016 | 56,1 MW | 1,6% |
| Norrskogen | 2023 | 102 MW | 1,2% |
| Power plant | Year built | Capacity | Herrfors’ Ownership Share |
|---|---|---|---|
| Herrfors | 1962 /2008 | 0,60 MW | 100% |
| Långfors | 1983 | 1,00 MW | 100% |
| Finnholm | 1958 / 2009 | 1,10 MW | 100% |
| Björkfors | 1932 & 1964 | 1,30 MW | 100% |
| Kattilakoski | 1979 / 2021 | 2,50 MW | 100% |
| Kimo | 2008 | 0,10 MW | 100% |
| Kaitfors | 1981 | 7,40 MW | 61,4% |
| Haapakoski | 1963 / 2007-2009 | 32,60 MW | 0,5% |
| Harjavalta | 1939 / 2014 | 105,00 MW | 0,1% |
| Isohaara | 1949 & 1993 / 2016-2017 | 112,50 MW | 0,5% |
| Jolmankoski | 1955 | 0,50 MW | 0,25% |
| Jumisko | 1954 / 2021 | 27,80 MW | 0,5% |
| Kaarannekoski | 1954 / 2009-2010 | 3,00 MW | 0,25% |
| Kierikki | 1965 / 2005-2007 | 37,50 MW | 0,5% |
| Maalismaa | 1967 / 2009-2011 | 38,60 MW | 0,5% |
| Melo | 1971 / 1998-199, 2014-2015 | 67,90 MW | 0,5% |
| Pahkakoski | 1961 / 2011-2013 | 42,40 MW | 0,5% |
| Portimokoski | 1987 | 10,50 MW | 0,25% |
| Raasakka | 1971 / 1997 | 64,30 MW | 0,5% |
| Power plant | Year built | Capacity | Herrfors’ Ownership Share |
|---|---|---|---|
| AK2 | 2001 | 240 MW | 50% |
| AK1 | 2001 | 25 MW | 50% |
| Vieskan Voima | 1994 | 6,5 MW | 25,3% |
| Raahen voima | 2016 | 125 MW | 0,1% |
| Tornion Voima | 2007 | 37 MW | 1,0% |
| Power plant | Year built | Capacity | Herrfors’ Ownership Share |
|---|---|---|---|
| Olkiluoto 1 | 1978 | 890 MW | 0,2% |
| Olkiluoto 2 | 1980 | 890 MW | 0,2% |
| Olkiluoto 3 | 2023 | 1600 MW | 0,2% |
| Power plant | Year built | Capacity | Herrfors’ Ownership Share |
|---|---|---|---|
| Hietakangas | 2025 | 5 MW | 23,0% |
| Heinineva | 2025 | 86 MW | 0,8% |
Choose Renewable Electricity – Easy and Responsible
With Herrfors’ Renewable Choice electricity contract, you are guaranteed that the electricity you consume is produced from 100 % renewable energy sources. You can make a climate-friendly choice without compromising on everyday comfort. Renewable Choice is available for all our contract types – pick the one that suits you best and make a sustainable decision.
- 100 % renewable electricity (wind, water, bioenergy)
- Verified origin with Guarantees of Origin
- Local and responsible energy production