The right idea at the right time –
a company with positive energy

Company profile

An idea transformed into a company. The company’s history began in 1996 with the founding of vento ludens by Horst Walz in Jettingen-Scheppach, a little town in Bavaria. Long established within the community, we have become a trusted employer for people from our region and beyond. With an eye on the environment combined with corresponding business acumen, we complete innovative projects using the latest technology.

The idea of harnessing energy from renewable sources transformed into our vision – a future without fossil fuels and nuclear power. To successfully drive this vision forward, we expanded our technology portfolio and now develop, own and operate a range of clean energy schemes.

Nature provides us with all the resources we need for this. We use them.

Following our initial success in Germany, we expanded by opening offices in Scotland, Switzerland, England and the Republic of Ireland. Since the company was founded, we have continually developed our expertise in wind power and photovoltaic systems. This foundation of knowledge enabled the next logical step, to expand our technologies further into the field of hydro power.

Actively exchanging knowledge and skills between our offices is the key to our success and quality of work. It is not just about developing and building projects, we aspire to motivate our team and support them in their role, encouraging them to make their unique contribution to the energy vision.

With care. Efficiently. Respectfully.


Horst Walz

Managing Partner

Joachim Finkel

Managing Director

José Basset

Managing Director Switzerland


New satellite office in Dublin
First wind farm in Scotland (Muirake)
First office in UK / Scotland
Company foundation in Jettingen-Scheppach


Vallosol GmbH

Founded in 2011, ValloSol GmbH is a young, dynamic company that is specialised in the technical management of both ground mounted and rooftop photovoltaic systems.
With a diverse team of experts, ValloSol offers a comprehensive service for the operational management of photovoltaic systems of all sizes.
Their approach to the management of PV systems ensures maximising the project with a focus on preventing non performance. In doing so, ValloSol can assure long term operation of a system at its optimal generation. The qualified service staff and certified specialist companies all guarantee rapid and effective reaction times in the event of a disruption.
The ValloSol GmbH portfolio will be expanded in the near future to include the technical management of wind farms.
Presently, ValloSol GmbH is supervising a number of photovoltaic systems throughout Germany, with a total capacity of more than 210 MW.

Koehler Renewable Energy GmbH

The Koehler Energy Group (KEG) is the subsidiary of the Koehler Group. KEG was established in 2012, where they have implemented many projects in the wind power sector, photovoltaics, hydropower and power-heat coupling. The experience within KEG shows specialism in all stages of the value chain: acquisition, planning, development and the smooth long-term operation are guaranteed by the long-time expertise of their employees.

Over the upcoming years, KEG strives for a continuous growth. Together with different partners. The experienced team has realised projects with a value of several hundred million Euros. The different projects annually generate over 225,000 MWh electricity, over 21,000 MWh heat energy and over 150.000 tons steam. (stated: December 2018)

The headquarter of the company is in southwestern Germany. KEG plans and operates projects in Germany and abroad.