SOL IN ONE GmbH is the "ALL IN ONE" company for photovoltaic systems. We offer planning, construction and maintenance of your solar system from a single source.



By means of drone-supported surveying, we create an individual CAD plan for your photovoltaic project.

Plant engineering

We implement your PV system completely from one source. From the first meeting with the energy supplier to the installation and commissioning of the system, we are able to carry out all work without subcontractors with our strong team.

Maintenance & Monitoring

A photovoltaic system is a valuable investment. Clearly, it also requires regular maintenance. We offer you the all-round carefree package from a single source!


Installed capacity since 2018
1157 MWp

Projects since 2018


Safety and quality to the highest standards

Certified according to ISO 9001:2015 SCC**

Since the beginning of its existence, SOL IN ONE GmbH has stood for quality and customer satisfaction. With the certification according to DIN ISO 9001:2015, our striving for constant improvement and optimal processes was confirmed. This motivates us to give our all for our customers in the future and to constantly improve.

Furthermore, we are in possession of the company certificate SCC**. This certificate according to the SCC regulations (Safety Certificate Contractors) proves that our company fulfils the basic (occupational) safety, health and environmental protection standards (SHE).
You can find further information here.