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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,544 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsPlan-Les-OuatesPhotosun Sàrl
Photosun Sàrl Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Photosun is the planning, installation and marketing of renewable energy production facilities, in particular: the installation of photovoltaic systems to generate electricity from sunlight, and the installation of heat pumps for efficient use of environmental heat for heating and cooling. The company offers its customers a comprehensive service, from consulting and planning to installation and maintenance of the facilities.

AI-generated
Offering

Products & services

Industry:Solar & Photovoltaics
✓ Offered4
Photovoltaic solar panel installation
Turnkey installation of photovoltaic solar panels, including system study, diagnostics, technical site visit, administrative handling, subsidies, installation and remote monitoring.
Air-to-water heat pump
Air-to-water heat pump for space heating and domestic hot water, including system study, installation, administrative procedures, subsidies, maintenance and servicing.
Maintenance and servicing of photovoltaic systems
Maintenance, servicing and repair of photovoltaic systems carried out by the in-house teams, with continuous monitoring and optimization.
Heat pump maintenance and servicing
Maintenance and servicing solutions for heat pumps, provided by the in-house teams, in addition to the guarantees on the installations and products.
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4.4/5

Photosun Sàrl

Trust & reputation

ranQ Trust Score of Photosun Sàrl: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 96% · As of October 2026

Photosun Sàrl scores 85.7 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
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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.78.924%
  • 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.100.010%
  • 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.88.08%
Photosun Sàrl scores 82.3 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.89.612%
  • 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.70.07%
Photosun Sàrl 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%
Photosun Sàrl scores 31.4 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 35.31.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Photosun Sàrl reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.6 out of 5 stars from 131 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
4.6
of 5

Aggregated from 131 reviews across all connected sources

Sources
GGoogle4.6131
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Route de Saint-Julien 184 A
1228 Plan-Les-Ouates
Opening hours
Mon
08:00 - 18:30
Tue
08:00 - 18:30
Wed
08:00 - 18:30
Thu
08:00 - 18:30
Fri
08:00 - 18:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-249.043.537
Founded
2015 · 11 years
Last commercial register change
July 28, 2025
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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