SI-REN

What SI-REN does

SI-REN SA is a renewable energy corporation established in December 2009 as an official instrument of the Ville de Lausanne's energy policy. The company develops and operates distributed electricity generation assets across the Lausanne metropolitan area across four technology lines: solar photovoltaic (the dominant business), wind, biomass/biogas, and geothermal. Its end-customers are essentially the city itself, Services industriels de Lausanne (SiL) — the municipal utility — and neighboring communes (Renens, Ecublens), with electricity sold into the local grid.

The solar PV portfolio is the largest asset base, comprising 125 installations and 17.15 MWc of installed capacity at end-2024, producing 13.8 GWh of electricity during the year (up from 12.81 GWh in 2023). Installations span standard rooftop PV, micro-inverter configurations enabling per-panel monitoring (Rue Port-Franc 18, Lausanne), V-panel arrangements for production optimization, green roof integrations, and a pilot dye-sensitized solar cell (DSSC/Graetzel cell) project at Place de la Navigation in Ouchy supplied by H.Glass. The wind vertical is anchored by the planned EolJorat Sud project (8 turbines in the Jorat forest, sized to cover the equivalent of 22,000 households). Biomass operations run through a 39% stake in Palézieux Bio-Énergies SA, which ferments agricultural residues into electricity and heat. Geothermal exposure is held through the AGEPP SA joint venture at Lavey-les-Bains (110°C water at 40 l/s), targeting 4.2 GWh of electricity and 15.5 GWh of thermal energy per year.

SI-REN is wholly owned by the Ville de Lausanne as a Société Anonyme (Swiss corporation) and operates with a small core team of 1–10 staff. Revenue is generated from electricity sales to the grid — pricing is not publicly disclosed — alongside its share of biogas production. Go-to-market is direct municipal partnership rather than competitive sales: SI-REN works in close collaboration with SiL to identify and develop renewable installations on public buildings, schools, transit depots, sports facilities, and healthcare sites. The company has accumulated recognized expertise, including the 2017 Prix Solaire Suisse in the Institutions category, and has steadily scaled its asset base through both organic installation growth and minority JV stakes.

Name

SI-REN

Legal name

SI-REN SA

Website

https://si-ren.ch

Company type

Private

Founded year

2009

Operating status

Operating

Headcount range

1–10 employees

Short description

SI-REN SA is a municipal renewable energy company wholly owned by the Ville de Lausanne that develops and operates solar, wind, biomass, and geothermal electricity generation assets across the Lausanne metropolitan area for the city and its public institutions.

Ownership category

akta.pro rank

Product category

Renewable Energy Production

NAICS

Solar Electric Power Generation (221114), Electric Power Generation (22111), Wind Electric Power Generation (221115), Geothermal Electric Power Generation (221116), Steam and Air-Conditioning Supply (221330)

SIC

Electric, Gas & Sanitary Services (4900), Cogeneration Services & Small Power Producers (4991)

akta.pro primary industry

Microgrid Development, EPC & Integration (EUAMAJAB)

akta.pro secondary industries

Energy & Renewables Specialty Contracting (Solar PV, Storage, EV Charging) (IMAFALAJ), Renewable Energy Infrastructure (FSAAAKAG), Electrical Systems O&M (Substations, Transformers, Switchgear, Protection & Controls) (EUAMAGAH)

Keywords

• Solar photovoltaic installations
• Wind energy projects
• Biogas production
• Geothermal energy development
• Renewable electricity generation

Headquarters

HQ city

Lausanne

HQ country

Switzerland

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Infrastructure, Technology or R&D, Supply Chain, Marketing or Sales, Operations

Revenue model

1. Electricity production and sale: SI-REN generates revenue through developing and operating renewable energy installations that produce electricity sold to the grid. The company is a key instrument of Lausanne's energy policy, focusing on increasing renewable energy production for the city and agglomeration.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

SI-REN develops, installs, and operates distributed renewable electricity generation assets across the Lausanne metropolitan area in four technology verticals: solar photovoltaic (rooftop PV, micro-inverter systems, dye-sensitized cells, green roof integration, V-panel configurations), wind energy (EolJorat Sud), biogas (Palézieux Bio-Énergies joint venture), and geothermal (AGEPP hydrothermal project). The company operates as the dedicated execution vehicle for Lausanne's municipal energy policy in collaboration with Services industriels de Lausanne.

Product overview

SI-REN SA is a renewable energy company created in December 2009 as an instrument of Lausanne's energy policy. The company operates as a diversified renewable energy provider offering four main product lines: (1) Solar Photovoltaic Installations including rooftop, V-panel, micro-inverter, green roof, and dye-sensitized solar cell (DSSC) systems; (2) Wind Energy Projects through the EolJorat initiative; (3) Biogas Production via the Palézieux Bio-énergies joint venture; and (4) Geothermal Energy through the AGEPP project at Lavey-les-Bains. The core offering centers on developing and operating distributed renewable energy installations across the Lausanne metropolitan area, with monitoring services via SolarLog platform.

Differentiator

Problem solved

Functional benefit

Quantifiable outcome

• 125 solar installations producing 13.8 GWh annually as of 2024
• +2 more outcomes

Named customers7 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Six partnerships are on record, tiered core and minor.

• AGEPP SAcoreStrategic or Co-development Partner · 12 June 2017AGEPP SA (Assurance Géothermique et Production d'Eau chaTaude) is a geothermal project at Lavey-les-Bains. SI-REN SA is one of the main partners. The project aims to exploit geothermal water at 110°C with a flow rate of 40 l/s, producing 4.2 GWh electricity and 15.5 GWh thermal energy annually. Partners include Holdigaz SA, EOS Holding SA, Romande Energie SA, CESLA SA, and communes of Lavey-Morcles and St-Maurice.
• Palézieux Bio-énergies SAcoreStrategic or Co-development PartnerSI-REN owns 39% of Palézieux Bio-énergies SA capital. The installation produces biogas through fermentation of organic matter (manure, grass, cereal residues, cheese residues) generating electricity and heat. Operators are the Ramseyer brothers, farmers who provide agricultural waste for biogas production.
• Services industriels de Lausanne (SiL)coreStrategic or Co-development PartnerSI-REN works in close collaboration with Services industriels de Lausanne (SiL) as an important instrument of Lausanne's energy policy. SiL is the municipal utility company that oversees energy infrastructure in the city.
• Ville de LausannecoreStrategic or Co-development PartnerSI-REN SA is an instrument of Lausanne's energy policy, established as a company to develop renewable electricity production for the city and contribute to environmental objectives.
• Communes of Renens and EcublensminorChannel Partner/ Reseller/ DistributorSI-REN collaborates with neighboring municipalities including Renens (Collège de Censuy) and Ecublens (Collège de la Coquerellaz) for intercommunal solar installations on school rooftops.
• SwissolarminorOthersSI-REN participates in Swissolar seminars and presents its remote monitoring and public communication experiences. Company has been involved in national photovoltaic congress.

Scale indicators10 records

Recent moves9 records

Expansion highlights7 records

Broad incumbents

• BKW Energie AG: Swiss integrated energy company with growing renewable generation and grid services businesses. Comparable through its distributed generation and municipal energy-supply activities, but at substantially larger scale than SI-REN.
• Energie Wasser Bern (ewb): City-owned energy utility of Bern, developing and operating renewable generation assets (solar, wind, hydro, biomass) for its municipal shareholder. Closely matches SI-REN's municipally owned, multi-technology distributed generation model.
• Elektrizitätswerke des Kantons Zürich (EKZ): Cantonal utility of Zürich operating solar, wind, hydro, and biomass assets across northeastern Switzerland. Comparable as a publicly owned distributed renewable developer, though at significantly larger scale.
• Industrielle Werke Basel (IWB): City-owned multi-utility of Basel that develops and operates renewable generation (solar, wind, biomass, geothermal) on behalf of its municipal owner. Highly comparable governance and multi-technology model, but serving a different and larger Swiss city.
• Alpiq Holding AG: One of Switzerland's largest electricity producers with a significant renewable portfolio (hydro, wind, solar) and pan-European operations. Overlaps with SI-REN on technology and customer type but operates at national scale rather than municipal.

Direct peers

• EOS Holding SA: Swiss energy group supplying electricity to Lausanne and other Vaud communes and a partner in the AGEPP geothermal venture. Comparable in that it develops and operates generation assets in the same Swiss Romandie market for municipal shareholders.
• Services industriels de Lausanne (SiL): Lausanne's municipal utility and SI-REN's closest strategic partner. SiL oversees the city's energy infrastructure and co-develops renewable projects with SI-REN, operating as a vertically integrated generator-distributor-retailer in the same geography and customer base.
• Groupe E SA: Vertically integrated electricity utility serving Fribourg and neighboring Vaud communes, with a growing renewable generation portfolio (hydro, solar, biomass). Operates in the same Swiss Romandie market as SI-REN with overlapping municipal and SME customers.
• Holdigaz SA: Western Swiss gas and energy group and SI-REN's partner in the AGEPP geothermal project. Holdigaz operates decentralized renewable and thermal assets for communes in the Vaud and Valais region, with a comparable municipal-customer and multi-technology operating model.
• Romande Energie Holding SA: Major Swiss electricity utility headquartered in the same canton (Vaud) and a partner alongside SI-REN in the AGEPP geothermal project. Romande Energie develops and operates renewable generation (hydro, solar, wind) for western Swiss municipalities, making it the closest direct comparable in terms of geography, technology mix, and customer profile.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/si-ren-sa

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about SI-REN