Hydropower is a clean renewable energy source. Snow and rainfall, creating streams and rivers, renew the source.

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

Historically people have used rivers for agriculture and to power watermills and sawmills for example. Today, rivers are re-directed through hydro generators to produce electricity.

Hydropower categories include:

Reservoir production: Water is stored in reservoirs, with the flow controlled to produce an even supply. Pump storage plants pump water upstream during periods of low demand. The water is released when demand is increases.

Run-of-River uses natural river flows, not reservoirs or water storage.

Small Scale Origin hydropower plants are those with less than 20 MW capacity.

A large share of the world’s power production comes from hydropower. In Norway, hydropower represents approximately 99% of the total electric power production. With 136 TWh of production as of 2020, this is the highest volume in Europe.

Norway has more than 100 years’ experience and world-class competence in building and operating hydropower plants. Over the past decades, older installations have been upgraded to increase operational efficiency. The operations are also designed to reduce the impact on the environment and help improve local biodiversity.

Hydropower generation

Hydropower is the largest source of renewable electricity in the world, producing around 17% of the world’s electricity from over 1 307 GW of installed capacity. Annual net capacity growth has slowed in recent years, due to fewer large projects being developed in China and Brazil. However, cumulative capacity is still expected to increase by an additional 230 GW by 2030 (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.