Geothermal energy

Geothermal energy

Geothermal energy captures the heat from two to three kilometers under the earth’s surface where water meets heated rock and turns it into steam. Steam is led from boreholes to turbines inside the powerhouses of geothermal energy plants, transforming thermal energy into electricity.

Buying Energy Attribute Certificates (EACs) from geothermal energy guarantees that the renewable energy consumed is from this source.

Geothermal energy production is unique because:

  • It is a non-polluting and environmentally friendly renewable energy source
  • Has no waste and does not generate by-products
  • Has low land-use footprint
  • Does not represent a hazard for the natural surroundings
  • Has a low maintenance cost
  • Is not dependent on weather conditions.

Geothermal energy can also be used for heating and cooling, cooking, hot spring baths, agriculture, aquaculture and industrial processes.

Geothermal energy is only found in a few locations and the installation cost is high.


Geothermal power generation

In 2018, global geothermal power generation stood at an estimated 93 TWh, while the cumulative capacity reached 14.4 GW. Global geothermal power capacity is expected to rise to just over 17 GW by 2023, with the biggest capacity additions expected in Indonesia, Kenya, Philippines and Turkey (IEA).



Meet an environmental standard of your choice

Consume renewable energy meeting requirements of specific standards or ecolabels. Buy Guarantees of Origin from power plants that meet stricter environmental standards and are verified by an external auditor. Choose between national or international ecolabels and standards, document the age and type of the power plant, technology and unique operational focus, and raise funds for renewable energy projects.


International ecolabel for renewable electricity with strict criteria for environmental impact, and that directs funds to new renewable energy projects

Bra Miljöval

Swedish ecolabel with strict environmental criteria


German ecolabel for renewable electricity from new or upgraded power plants

TÜV Nord A75

A German ecolabel promoting energy from new power plants


German ecolabel for renewable electricity from new power plants, with a mix of technologies and fund allocation

Naturemade Star

Swiss ecolabel with strict environmental criteria

Green-e® Energy

Green-e is North America’s leading certification program for renewable energy.

Customise to fit your specific needs

Consume renewable energy with specific characteristics. ECOHZ provides access to a comprehensive portfolio of more than 200 power plants, located across five continents. This enables you to choose specific power plants with distinct characteristics, including choice of technology, location, age, size, and owner profile.