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Sustainable energy
for a greener future.

 Solar Energy
Make the best out of your roof.


Reduce energy costs in a future-proof way? Become independent of conventional energy suppliers? Make your contribution to the preservation of our environment? 

No matter what your personal motives are - as an expert for photovoltaics and sustainable energy solutions, we provide you with everything from a single source. From planning to installation to final acceptance and beyond, we at GEONIMA Solartechnik are your reliable partner.

Convince yourself and request your free offer!

For over 15 years
What we do.


Commercial roofs

Private roofs


Open spaces

In a few steps
to your own solar system.


Free consulting

In order to know your wishes and ideas, a personal conversation is just as important for us as a professional and customized energy concept. You will then receive your individual offer in writing. 

In order to ensure a smooth process, we take care of the logistics and the professional installation of your solar system. In addition to the hardware, we also take care of the final mains connection.


Professional assembly


Customized planning

As a central contact partner, we put together the right components for you in close coordination with you. We offer a wide range of national and international manufacturers. System extensions such as storage or charging stations are also possible without any problems.


From the initial consultation to the final commissioning, we are at your side with our expertise and keep you informed at all times. Finally, you will receive a detailed briefing on your new solar system. We monitor the system and yield data of your system and thus ensure its flawless performance.

Final commissioning

Sustainable and lasting
Reduce electricity costs.

Photovoltaics is booming. Become part of the energy transition and use the previously unused area of your roof. With a photovoltaic system, you produce and consume your own green electricity directly on site. 


Electricity prices in Germany are among the highest in Europe - and the trend is still rising. With your own photovoltaic system, you not only generate cheap and climate-friendly energy, but you also become less dependent on your current electricity provider and rising electricity prices! 

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Aktuelle Projekte.

Gütersloh - 1.500 kWp


We introduce ourselves
Who we are.

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Frank Semrau


   We look forward to hearing from you!

Since 2007, we have made it our mission to support you on your way to a more sustainable future and energy independence. As an owner-managed company, we place particular value on personal contact with the customer and your individual wishes - and develop the right energy concept for you in close consultation with you. Now in its second generation. 

Whether it is a company building, an open space installation or simply the desire for green energy in your private home - we are active throughout Germany and will be happy to advise you in detail on all aspects of your planned project! 

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Interest aroused?

Contact us to get one
arrange a free consultation.

For a first offer we need a few details about your planned project. Please fill them out or contact us directly by email or phone.

Service area: North Rhine-Westphalia

From 100 kWh nationwide

A:  Gerolsteiner Straße 3, 50997 Cologne

T:  +49 (0) 2236 331 60 20 

Thank you for your inquiry! We will get back to you as soon as possible.

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