sunday solar GmbH - Solar Installation Specialists Berlin & Brandenburg

Sunday Solar GmbH installed our photovoltaic system three years ago, and we were completely satisfied. We recently had them retrofit a storage system. From the initial quote to the installation and commissioning, everything went perfectly. We highly recommend them. Sincerely, B. Heizmann

Today, our Fronius solar system was commissioned by Sunday Solar. The installation of the entire 10kW system, including the battery storage and wallbox, took four days (one day for scaffolding, two days for installation, and one day for final connection to the junction box and commissioning). The entire process, from the initial site visit by Mr. Ruh and the quote preparation to the installation, was flawless and quick. All the installers and electricians were very friendly and motivated. The work was carried out very neatly; there was nothing to complain about. I would definitely use this company again and can absolutely recommend them.

Despite several alternative offers, we already had the feeling during the consultation phase that we had found the right partner. This was more than confirmed during the implementation. Reliable, fast, friendly, and above all, competent and patient. Even the tenth email with questions was answered. The technology was explained multiple times, and in the end, we received a system that not only works but is also fully understood and configured. Many thanks to everyone at Sunday Solar! We wish you continued success!

Complete satisfaction – we can absolutely recommend them! I am completely satisfied with Sunday Solar's work! From the initial consultation to the final commissioning of my PV system, everything was handled with absolute professionalism, transparency, and reliability. The team was friendly, competent, and always readily available to answer questions. The installation was carried out cleanly, quickly, and with great care. I was particularly impressed by the clear communication and their commitment to finding the best possible solution for my roof. I can wholeheartedly recommend Sunday Solar; this is what modern, customer-oriented service should be like. Thank you for the excellent work!

In early 2023, we were put in touch with sunday solar GmbH through a friend who is an energy consultant, and we were delighted that they quickly agreed to install a 10 kWp system (26 panels) with a 7.7 kWh battery storage system. The project was actually completed in April 2023. Initially, we were quite skeptical because the consultation and contract negotiation went so smoothly – "no problem at all." It's hard to believe that kind of efficiency from tradespeople these days. But it was true. This relaxed approach continued throughout the entire project. Two days were allotted for the installation. However, it was finished in just one day! The guys worked incredibly hard! Friendly staff, a clean construction site – exactly as you'd imagine (no temporary workers or subcontractors). A week later, someone else came and completed the connection to the meter, the battery and inverter wiring, and the internet connection in half a day. ``` Sunday Solar also handled the registration with the local grid operator. The fact that the meter's activation and reinstallation took some time was, of course, not their fault. The grid operator was completely overwhelmed at the time. A few days ago, I had a problem with an error message. And here too – nine months after installation – I received prompt feedback by phone and email, so this minor issue was resolved within two hours. We are thrilled and can wholeheartedly recommend the company without reservation. Thanks a lot, guys!