Photovoltaics in
Olten

DD Solar GmbH

Since 2023 · 1–10 empl.·5.0(13)

DD Solar GmbH plans and installs photovoltaic systems for households, businesses and agricultural customers. Its services also include energy storage, charging stations, maintenance, cleaning and photovoltaic contracting.

Hansesun Photovoltaik Swiss GmbH

Since 2025 · 11–20 empl.

Hansesun Photovoltaik Swiss GmbH plans, installs and services photovoltaic systems, electricity storage systems, energy controls and electric-vehicle charging stations. It also handles related permits, subsidy applications and grid connections.

TRIENERGY Solutions AG

Since 2023 · 11–20 empl.·5.0(3)

TRIENERGY Solutions AG is a wholesaler serving photovoltaic projects. Its products include mounting systems, PV storage, solar modules, inverters and related components, and it also offers planning software for solar installations.

Markus Aregger Bedachungen und Spenglerei

Since 2011 · 1–10 empl.·5.0(2)

Markus Aregger Bedachungen und Spenglerei carries out roofing and sheet-metal work. Its services include pitched and flat roofs, roof coverings, façade work, and the planning and installation of photovoltaic systems for new buildings and renovations.

Konzept E AG

Since 2023 · 1–10 empl.

Konzept E AG develops and plans energy projects, with a focus on photovoltaics and the use of renewable energy. The engineering company prepares concepts for energy communities, billing solutions and the integration of storage, electric mobility and heat pumps, and can also support project implementation.

SunTechnics Fabrisolar AG

Since 2024 · 1–10 empl.