Energy consulting in
Nyon

Louis Bally et fils S.A.

Since 1959 · 1–10 empl.·4.0(8)

Louis Bally et fils S.A. is an electrical installation company serving private and business customers. Its services include the planning and installation of electrical systems, lighting, telecommunications and building automation, as well as repairs, energy consulting, solar photovoltaic systems and battery storage.

Bally Énergie Sàrl

Since 2024 · 1–10 empl.·5.0(20)

Bally Énergie Sàrl provides energy consulting and related services. Its activities include planning and installing photovoltaic systems and battery storage, energy monitoring and optimisation, support for collective self-consumption schemes, and maintenance and repairs.

SEContrôles SA

Since 2007 · 1–10 empl.·4.4(5)

SEContrôles SA provides consulting, inspections and project management for electrical installations, including high-voltage systems. Through its subsidiary Ecotoxic, its services also include building pollutant assessments, remediation monitoring and building energy certificates.

Effinergy Sàrl

Since 2020 · 1–10 empl.

Effinergy Sàrl provides renovation and maintenance services for energy and HVAC systems. Its activities include chemical and hydromechanical cleaning of shell-and-tube condensers, corrosion protection, preventive and improvement maintenance, and the supply of heat pumps, thermodynamic water heaters and mechanical ventilation systems with heat recovery.

IE Immo-expertise.ch Sàrl

Since 2015 · 1–10 empl.·3.7(3)

IE Immo-expertise.ch Sàrl provides property valuations, building advice and diagnostics. Its services include real estate appraisals, cantonal building energy certificates (CECB), assistance to project owners, and support with property handovers and defect assessments.

OpenSky Technology Group Sàrl

Since 2025 · 1–10 empl.