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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsRomanel-Sur-LausanneCIEL Solar SA
CIEL Solar SA Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of CIEL Solar SA is the planning, installation and maintenance of solar systems for private, commercial and industrial customers in Switzerland, with the aim of promoting the energy transition and reducing dependence on fossil fuels.

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Offering

Products & services

Industry:Solar & Photovoltaics
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3.7/5

CIEL Solar SA

✓ Offered11
Turnkey installation
Turnkey solar solutions, from initial design to final installation, with full project management.
Precise solar studies
In-depth solar studies to assess the solar energy potential of residential, commercial or industrial projects, including climatic, topographical and architectural analyses.
Design and engineering
Custom solar system design for rooftop installations or architectural integration, tailored to the specific needs of each project.
Troubleshooting and maintenance
Diagnostics, problem resolution and maintenance contracts for new installations or existing systems, to ensure performance and longevity.
Profitability assessment
Detailed profitability analyses for solar projects, including initial costs, long-term energy savings and tax incentives.
Permitting assistance
Handling permit applications with the municipality and the grid operator, taking into account regulatory and local requirements.
Grants management
Handling available grant applications to facilitate financing for solar projects.
Solar support and follow-up
Continuous monitoring of solar installations, with regular site visits, preventive and responsive maintenance to ensure operation and performance.
Battery storage systems
Battery energy storage solutions to maximise self-consumption and optimise the use of solar energy.
Efficiency optimisation
Installation of an intelligent control system for heat pumps or water heaters, to efficiently manage energy resources.
Vehicle charging stations
Installation of EV charging points, presented as a practical charging solution for customers.
Trust & reputation

ranQ Trust Score of CIEL Solar SA: 3.7 out of 5.0

Trust Score3.7/ 5.0

Solid

x

Data basis 96% · As of October 2026

CIEL Solar SA scores 58.0 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.68.224%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.17.610%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.78.08%
CIEL Solar SA scores 59.7 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.39.612%
  • 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.55.07%
CIEL Solar SA scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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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).85.022%
CIEL Solar SA scores 20.0 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 35.20.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

CIEL Solar SA reaches a ranQ Trust Score of 3.7 out of 5.0 — rated «Solid». The rating draws, among other things, on 5.0 out of 5 stars from 1 customer reviews. The data basis is 96%, 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.

Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 1 reviews across all connected sources

Sources
GGoogle51
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

Knowledge

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Location

Route de Neuchâtel 8
1032 Romanel-Sur-Lausanne
Opening hours
Mon
08:00 - 17:00
Tue
08:00 - 17:00
Wed
08:00 - 17:00
Thu
08:00 - 17:00
Fri
08:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-348.873.399
Founded
2024 · 2 years
Last commercial register change
August 26, 2026
Employees
1 to 10
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.
100.0
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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