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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsLausanneDadi & Dunkel Energy Sàrl
Dadi & Dunkel Energy Sàrl Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The company dd-energy primarily focuses on services in the field of energy efficiency and sustainability, particularly in Switzerland and the Romandy region. The core activities include: Consulting services in the areas of energy efficiency, Minergie, and CECB; Engineering services for heating, ventilation, and solar systems; Planning and implementation of solar projects; Collaboration with customers and partners to achieve sustainability goals. The company supports private individuals, businesses, and public institutions in implementing energy efficiency measures and utilizing renewable energy sources.

AI-generated
Offering

Products & services

Industry:Solar & Photovoltaics
✓ Offered4
Energy consulting and advisory
Thermal assessments and energy optimisation, building physics, AMO for renovations, building permit dossiers, infrared thermography, energy audits, CECB certification and Minergie labelling.
Engineering of building services installations
Design and optimisation of heating systems, heat pumps, district heating, ventilation and air conditioning, sanitary systems, smart home, with an integrated design of energy infrastructures.
Photovoltaic and solar thermal installations
Grid-connected or stand-alone photovoltaic installations on roofs, façades or on land; solar thermal installations for domestic hot water and auxiliary space heating.
International cooperation and energy projects
Advisory services for photovoltaic and solar thermal power plants, rural electrification using renewable energy, drinking-water supply using renewable energy, technology transfer and territorial energy planning.
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4.1/5

Dadi & Dunkel Energy Sàrl

Trust & reputation

ranQ Trust Score of Dadi & Dunkel Energy Sàrl: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Dadi & Dunkel Energy Sàrl has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
x
CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Dadi & Dunkel Energy Sàrl scores 86.7 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.70.07%
Dadi & Dunkel Energy Sàrl scores 83.3 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).83.322%
Dadi & Dunkel Energy Sàrl scores 0.3 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.0.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Dadi & Dunkel Energy Sàrl reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, so the score is backed by part of the criteria. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Knowledge

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Location

Rue du Maupas 38
1004 Lausanne

At a glance

Legal form
Limited Liability Company
UID
CHE-109.702.209
Founded
2002 · 24 years
Last commercial register change
September 14, 2021
Employees
11 to 20
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
88.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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