Solar & Photovoltaics

Engynious AG 

Baar · Since 2001

The core activity of Engynious AG is the planning, construction and maintenance of decentralized renewable energy systems, in particular photovoltaic systems, as well as the provision of services in the field of energy generation and management. This includes the development of projects, the planning and installation of PV systems, the technical and commercial maintenance of plants, the optimization of energy costs and yields, as well as the provision of solutions for the storage and use of renewable energy.

ennos ag 

Merzligen · Since 2006

ennos ag designs and manufactures the sunlight pump, a high-efficiency surface solar water pump for smallholder farmers and irrigation applications. The company supplies systems with features such as Pay‑As‑You‑Go and remote monitoring, cooperates with manufacturing partners (e.g. Jain Irrigation, NETZSCH, Innovex) and distributes its products through an international network of dealers.

Enosis Sàrl 

Liebistorf · Since 2022

The core activity of Enosis SARL encompasses the planning, installation, and maintenance of renewable energy systems, particularly solar energy, as well as providing solutions for electrical power supply and installation. This includes: * Solar Energy: Installation and maintenance of solar panels, battery storage systems, and solar fences * Electrical Energy: Installation, maintenance, and quality assurance of electrical systems, including public lighting and lightning protection * Thermal Energy: Thermography and blower door tests for energy efficiency optimization * Hydraulic Energy: Installation and maintenance of hydraulic systems * Filtration Systems: Installation and maintenance of filtration systems for water and energy supply The company thus offers comprehensive solutions for energy supply and efficiency, with a focus on renewable energies and sustainable technologies.

EnQ Enlatec AG 

Since 2023

EnQ Enlatec AG develops and implements solar power and energy storage solutions, including its Multi Combined Power Plant concept and scalable storage systems designed to support grid stability and manage peak loads.

ENSUN AG 

Horn · Since 2023

The core activity of Ensun is the planning, installation and maintenance of photovoltaic systems for companies and multi-family homes. Ensun assumes the complete acquisition costs, maintenance, repairs and insurance of the systems for a period of 20 years, enabling customers to use the generated electricity themselves and feed surplus electricity into the public grid.

EOS Energy Solutions AG 

St. Gallen · Since 2015

EOSONO SAILING GmbH 

Benken Zh · Since 2009

The core activity of Eosono GmbH is the development, manufacture and distribution of photovoltaic systems, particularly aesthetic and efficient PV solutions for buildings and large-scale installations.

EOS Ristrutturazioni e Impianti di Sebastiano Conselmo 

Soazza · Since 2017

EOS Ristrutturazioni e Impianti di Sebastiano Conselmo provides photovoltaic, solar thermal and hydraulic systems and performs interior and exterior building renovations. Services include design and turnkey installation of photovoltaic systems, installation of stainless-steel chimneys and pellet stoves/boilers, roof refurbishment and asbestos removal, plus permit handling and maintenance.

PROJEKTE SWM AG 

Stäfa · Since 2012

EPAREN SA 

Epalinges · Since 2021

The core activity of EPAREN SA is the realization, financing and operation of renewable energy plants, in particular solar energy plants.

EPASUS AG 

Steffisburg · Since 2017

EPASUS AG is a globally networking, technology-oriented company focused on sustainability markets, particularly energy efficiency, energy systems and renewable energies. It connects companies and innovations, supports or takes part in firms offering sustainability-oriented technologies or infrastructures, and provides strategic expertise on market positioning and efficiency improvements. The company also participates in the implementation of renewable energy systems, for example high-efficiency photovoltaic technology.

eplus elektroplanung GmbH 

Uster · Since 2015

The core activity of e+ elektroplanung gmbh is the planning and implementation of electrical projects, particularly in the field of renewable energy and sustainable solutions.

E-Q GmbH 

Herisau · Since 2020

E-Q GmbH provides electrical installations and network/data cabling for residential and commercial properties. The company implements smart-home systems (KNX, Loxone), plans and installs photovoltaic systems, and supplies telematics/VoIP and unified-communications services.

Erneuerbare Zukunft Holding AG 

Adliswil · Since 2022

The core activity of the company 'Erneuerbare Zukunft Holding' is to provide holistic energy solutions, particularly in the field of renewable energies. This includes: planning and installation of photovoltaic systems, installation of battery storage systems, charging solutions for e-mobility, development of ZEV and vZEV models (association for self-consumption and virtual association for self-consumption), promotion of local energy communities (LEG), trading of solar power, and electricity billing. The company offers these solutions to businesses, industry, and private individuals, aiming to optimize their energy efficiency and independence, and contribute to climate protection and a sustainable energy future.

Erte Ingénieurs Conseils SA 

Carouge Ge · Since 1990

The core activity of ERTE Consulting Engineers AG is the planning, consulting and implementation of innovative energy concepts in the field of building technology, particularly in the areas of heating, ventilation, air conditioning, solar energy and earth-to-air heat exchangers. The company offers services from conception to maintenance and focuses on the development of environmentally friendly and efficient solutions for private and public construction projects.

E-Sol Energy Solutions Hugo Campos Fonseca 

Winterthur · Since 2024

The core activity of E-Sol Energy Solutions is the planning, installation, maintenance and consulting of photovoltaic systems, storage and energy management systems for private and commercial customers.

ESOTEC GmbH 

Innertkirchen · Since 1995

The core activity of esotec GmbH is the planning, installation and maintenance of energy and water supply systems for buildings in the Alpine region, particularly in remote areas without connection to the public utility grid. The services include the areas of photovoltaics, solar thermal energy, small hydroelectric power plants, drinking water supply, wastewater and sewage disposal, as well as mini combined heat and power plants. In addition, the company also offers general contractor services for new construction and renovation projects.

Esprit Energie Sàrl 

Saxonne (Ayent) · Since 2010

The core activity of Esprit Energie Sàrl is the planning and implementation of energy-efficient and sustainable construction projects, particularly in the field of Minergie and CECB standard buildings, as well as consulting and implementing projects in the field of renewable energy and sustainable development.

Esquisse Solaire Sàrl 

Bussigny · Since 2018

Esquisse Solaire Sàrl is a consultancy specialising in BIPV (Building Integrated Photovoltaics) that advises on the architectural integration of solar energy into buildings. The company conducts studies for roofs and façades (sizing, cost and yield estimates, product recommendations, connections to installers) and supplies Esquisse Glass™, a coloured glass for photovoltaic façades based on a patent‑pending optical interference technology.

ESRJ Energy et services Sàrl 

Lausanne · Since 2024

ESRJ Energy et services Sàrl is a company operating in the energy sector, with a focus on electricity. It provides power trading in partnership with Services Industriels de la ville de Lugano (AIL), designs and installs solar generation systems, and offers advisory and strategic support services.