Solar & Photovoltaics in
Olten

DD Solar GmbH

Since 2023 · 1–10 empl.·5.0(13)

The core activity of DD Solar GmbH is the planning, implementation and maintenance of solar systems for private households, companies and public institutions, with a focus on innovative and sustainable solar technologies and photovoltaic systems.

Hansesun Photovoltaik Swiss GmbH

Since 2025 · 11–20 empl.

Hansesun Photovoltaik Swiss GmbH plans, installs, commissions and services photovoltaic systems, battery storage, control systems and EV charging stations. The company also handles permits, subsidies and grid connection as a one-stop provider.

TRIENERGY Solutions AG

Since 2023 · 11–20 empl.·5.0(3)

The core activity of TRIENERGY Solutions AG is the wholesale trade of products and solutions for photovoltaic systems, including solar modules, inverters, mounting systems, PV storage systems and accessories. The company also offers energy management solutions and consulting services.

Markus Aregger Bedachungen und Spenglerei

Since 2011 · 1–10 empl.·5.0(2)

The core activity of Markus Aregger Bedachungen und Spenglerei encompasses the planning, consulting and execution of work in the area of roofs and facades, including: Roofing (pitched roofs, flat roofs, roofing membranes), sheet metal work (downspouts, roof edge finishes, chimney cladding, dormer windows), facade cladding, photovoltaic systems, and lightning protection systems. The company offers its services for both renovations and new constructions, promising tailored solutions for its customers.

Konzept E AG

Since 2023 · 1–10 empl.

Konzept E AG develops and supports projects related to the production and use of renewable energy. Its core focus is on photovoltaic systems, energy communities, billing solutions, and the integration of storage, e-mobility, and heat pumps.

SunTechnics Fabrisolar AG

Since 2024 · 1–10 empl.