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Cecilienkoog 16DE25821Reußenköge
Phone:+49 (0)4671 6074-0
Fax:+49 (0)4671 6074-119
100 % renewable energies for all!

GP JOULE is an integrated energy supplier and operates along the entire value chain from generation to consumption, and from consultancy, financing and project planning to construction and servicing.


GP JOULE produces and markets wind and solar power, green hydrogen and district heating and uses the energy where it is most effective: in the mobility sector, in domestic households, and in the industrial sector. From its base in Germany, GP JOULE has been shaping Europe's future energy system since 2009.

Using their knowledge and experience with RE projects, two agricultural engineers, Heinrich Gärtner and Ove Petersen, decided to found a company in 2009 and to name it after their initials: GP JOULE.

Their vision is to supply the industrial and transport sectors and the rest of society with energy from 100% renewable sources. Their approach is based on respect for all partners and a sense of responsibility towards the environment and future generations.
It was with these values in mind that GP JOULE was launched. As early as 2010, they had already installed solar and biogas facilities with a combined capacity in excess of 100 MW. In 2011, the largest solar park in Germany at the time was built on the spoil heap of a former open-cast lignite mine and had a total output of 140 MW, of which GP JOULE was responsible for the installation of 70 MW. New green energy is replacing legacy energy.

GP JOULE entered the green hydrogen business in 2012, the same year in which the first wind farm planned by GP JOULE was connected to the national grid and the first GP JOULE solar farms began operations in Italy and France. And the trend continued: GP JOULE expanded into Canada and the USA, and later into Ireland and Italy, where they also planned, designed, and installed solar parks. The green revolution is everywhere.

And GP JOULE did not stop there: a separate division known as CONNECT was founded to focus on e-mobility and charging solutions, a revolutionary hydrogen project called eFarm was pushed forward (and was awarded the German Mobility Prize in 2022), and GP JOULE is currently involved in one of the largest solar parks in Germany in Klettwitz in the Lusatia region, on another former lignite mining site, but this one will produce an impressive 300 megawatts.

Members of:
  • Betriebsführerbeirat