Solar & Photovoltaics

Krieg Haustechnik GmbH 

Wangen Sz · Since 2013

The core activity of Krieg Haustechnik GmbH is the planning, execution and maintenance of building technology systems, particularly in the areas of heating, plumbing and bathroom renovation. The company offers comprehensive solutions for new construction, renovation, renovation and modernization of building technology systems and has a wide range of services, including installation, service and maintenance.

KRT Engineering & Consulting GmbH 

Magden · Since 2021

KRT Engineering & Consulting GmbH operates local electricity communities (LEG) and implements regional photovoltaic installations. The company coordinates production and local distribution of solar power, often using battery storage for supply security, issues billing based on smart‑meter data, and enables participation by both producers and consumers.

Krüsi Sicherheits- und Solartechnik 

Embrach · Since 2002

The company's core activity is the installation and distribution of solar systems and related components such as photovoltaic modules, inverters and solar storage systems.

KTK Swiss Energy AG 

Vorderthal · Since 2023

The core activity of KTK Swiss Energy AG is the installation and financing of photovoltaic systems on the roofs of private individuals and companies, with the aim of promoting sustainable energy supply in Switzerland. The company finances the systems and offers roof owners the opportunity to benefit from rental income or discounted electricity.

Küenzi & Co. AG 

Münchenbuchsee · Since 1975

The core activity of Küenzi & Co AG is the planning and execution of building technology services, particularly in the areas of: sanitary installations, heating systems, plumbing work, and repair and maintenance services. The company also offers specialized services such as bathroom renovations, water connections, heating system construction, solar systems, pellet and wood heating systems, as well as rainwater utilization and water supply.

La Maison des Energies SA 

Morges · Since 2019

The core activity of the company "La Maison des énergies" is the planning, installation and consulting of solutions for renewable energy and energy efficiency, particularly: * Installation of photovoltaic systems * Heat and cold generation systems (heat pumps, thermodynamic boilers) * Insulation and sealing of buildings * Energy-efficient solutions such as relamping * Energy consulting and analysis (energy balance) * Energy storage * Air conditioning and ventilation of buildings The company thus offers comprehensive solutions for a sustainable and efficient energy supply of buildings.

Landtwing Telefon und Elektro AG 

Zug · Since 1992

The core activity of Landtwing Telefon und Elektro AG is the provision of services in the fields of electrical engineering, telecommunications and IT. Specifically, this includes: electrical services, renovations and conversions, high-voltage and telephone installations, residential, commercial and office installations, IT cabling, building automation, service and repairs, and planning and execution of projects in the fields of electrical engineering and telecommunications.

laube-solar GmbH 

Böbikon · Since 2011

The core activity of Laube Solar is the planning, implementation and maintenance of photovoltaic systems, including the use of photovoltaic storage systems. The company offers turnkey solutions for the installation of solar systems on residential and other buildings.

LENI Elektrotechnik GmbH 

Niederuzwil · Since 2020

LENI Elektrotechnik GmbH provides electrical installations and related services, including residential electrical work, lighting solutions, photovoltaic systems, EV charging station installation and maintenance, smart home systems, and network technology.

Lerm Solar AG 

St. Gallen · Since 2024

Lerm Solar GMBH provides consulting, sales, system planning and installation of photovoltaic systems, along with project management and economic feasibility calculations.

Leutenegger Energie Control 

Küsnacht Zh · Since 1990

The core activity of LEC (Leutenegger Energie Control) is the planning, consulting and implementation of projects in the field of renewable energies, particularly solar heat and solar power. The company offers a wide range of services and products, including the planning and installation of solar systems, the development of solar boats and the manufacture of measurement technology and battery monitoring systems.

LGTEC AG 

Rorschach · Since 2015

LGTEC AG develops a technology for the metallization of solar cells that enables fine contact grid lines without using silver. The method reduces grid-line widths to about 10 micrometers and produces them in a single process step; the company offers sampling on a demonstrator machine for technology evaluation.

Lichtermehr AG 

Kaltbrunn · Since 2022

The core activity of Lichtermehr AG encompasses the planning, consulting and implementation of solutions in the field of electrical engineering, particularly in the areas of electrical planning and installation, lighting design and lighting planning, photovoltaic planning and installation, energy storage systems and e-charging stations. The company also offers services such as maintenance work, minor repairs and the retrofitting of existing lighting systems with LED technology.

LightSeeds SA 

Savagnier · Since 2024

LightSeeds SA develops modular, lightweight plug-and-play solar systems that convert surfaces into power. Its offerings include the LightSeeds® Solar Kit Box, lightweight solar modules and integrated applications for roads, railways, noise barriers, basement walls, roofs, facades and stand-alone systems, with monitoring and maintenance processes.

LIMA Solar AG 

Wil Sg · Since 2015

The core activity of LIMA Solar AG is the development, construction and operation of large-scale photovoltaic systems in Switzerland, with the aim of contributing to electricity production in Switzerland and shaping the country's energy future.

Limmattaler Energie Genossenschaft 

Geroldswil · Since 2022

The core activity of Limmattaler Energie Genossenschaft consists of financing, planning and operating decentralized solar power plants on properties in the Limmattal region, in order to generate locally produced electricity and sell it to the population, with the aim of promoting the energy transition and creating an ecological added value.

Littoral Energie SA 

Etoy · Since 2019

The core activity of Littoral Energie SA is the design and implementation of installations in the fields of heating and photovoltaics, particularly in providing solutions for the energy transition, such as the installation of heat pumps and photovoltaic systems. The company also offers services such as troubleshooting, maintenance, and project development in the field of renewable energies.

LM Solar Anlagen GmbH 

Holziken · Since 2023

LM Solar Anlagen GmbH designs and installs photovoltaic systems for residential and commercial roofs. The company carries out on-site assessments, obtains necessary permits and manages turnkey implementation including professional installation.

loolo AG 

Schindellegi · Since 2021

The company invests in renewable energies, particularly in solar power plants, and offers investors the opportunity to invest in these projects and earn a fixed return. At the same time, the investments are designed to have a positive social and ecological impact. The company also provides services to entrepreneurs by building solar power plants on their rooftops and supplying them with electricity at a reduced and fixed price to lower their energy costs.

Lorenz Energie AG 

Mühlrüti · Since 2024

Lorenz Energie AG designs and installs complete photovoltaic systems and provides energy optimization, storage solutions and scaffolding services. The company offers project-specific consultation and plans installations taking site conditions and customer requirements into account.