Solis Solar Energy - Photovoltaic Systems Cologne

Since February 2026, I've had a 9.5 kWp photovoltaic system installed by Solis. Before making my decision, I obtained several quotes to compare prices and services. Their offer wasn't the cheapest, but I'm very glad I chose them. From the very first meeting, they were extremely precise, always available to answer my many questions, and very quick to respond. The roof installation was carried out perfectly and safely, and the employees were always friendly and professional. The installation in the basement was also done very cleanly and neatly, with no cables lying around or visible. The system has worked flawlessly from the start, and I haven't had any problems to this day. Even after the installation, they were always helpful and available to answer any questions. If I were to undertake further projects in the future, I would contact them again without hesitation. A special thank you goes to Mr. Hartmann, who convinced me to reconsider my initial decision – in retrospect, I can say it was absolutely the right choice. Keep up the good work!

Bin seit vorgestern Betreiber einer PV-Anlage. Sowohl die Installation der PV-Module auf dem Dach als auch die Elektroinstallation im Haus waren reibungslos. Die Arbeiten wurden pünktlich, sauber, zügig mit großer Sachkompetenz durchgeführt. Abstimmungen mit der Fa.Solis und nachfolgender Dokumentation waren ebenfalls unproblematisch. Ich bin mit dieser Firma sehr zufrieden und kann sie gerne weiterempfehlen.

Excellent work by Solis Solar Energy. From planning to implementation, everything went smoothly and reliably. The work on site was done meticulously, and it's clear the team was proactive. A particularly impressive feature: the cabling wasn't simply run along the outside of the building, but rather through an existing chimney flue. The flue was blocked in one spot and had to be cleared with a long pole – significantly more work than a standard solution. Nevertheless, it was a clean and professional solution. I'm very satisfied with the system and the entire process. I can wholeheartedly recommend them.

We are very satisfied! It's a top-notch company. Everything went perfectly, from the initial quote to the final installation. The staff were very friendly, helpful, and competent. The work was carried out cleanly and professionally. The PV system is absolutely fantastic. It couldn't be better! We can wholeheartedly recommend this company. 🙂👍

Excellent advice. Honest and fair, unlike the competition. Solis solar energy wasn't the cheapest, but it wasn't the most expensive either. The installers on the roof were very friendly and delivered clean, professional work. The electrical work was also very professional, with superb wiring. Even the house electrician was impressed with the work. The only one who didn't cooperate was the grid operator, who changed the electricity meter very late. In conclusion: The Solis team is very well-coordinated, and everyone knows their role. All the trades worked together seamlessly. I'm very satisfied with everything from the initial consultation to the final installation – everything was friendly and professional.