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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsBrüttenSonnergie AG
Sonnergie AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Sonnergie AG is the planning, installation and servicing of photovoltaic systems, in particular in-roof systems, on-roof systems and flat roof systems, to generate sustainable energy and support customers in the implementation of solar projects.

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Products & services

Industry:Solar & Photovoltaics
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3.9/5

Sonnergie AG

✓ Offered7
Advisory, planning, installation and service of photovoltaic systems
Consulting, planning, installation and service of photovoltaic systems; tailor-made roof solutions, including commissioning, monitoring and optimisation.
In-roof systems
In-roof solar systems for new builds and roof refurbishment, integrated flush into the tiled roof or used as a protective roof surface; also retrofitting of existing tiled roofs.
On-roof systems
On-roof photovoltaic systems for existing roofs with a solid substructure; cost-effective installation, ventilation gap, easy maintenance and flexible retrofitting.
Flat-roof systems
Flat-roof photovoltaic systems with ballasted mounting, optimal orientation and structural assessment; for residential, commercial and industrial areas.
Solar consulting
Tailored solar consulting with a potential analysis of the property, planning based on electricity consumption and an objective system recommendation on site.
Photovoltaic installation
Professional installation of photovoltaic systems with precise installation, structural assessment and safe execution on the roof.
Service and maintenance of photovoltaic systems
Service and maintenance after commissioning, including monitoring, optimisation and a point of contact for ongoing system operation.
Trust & reputation

ranQ Trust Score of Sonnergie AG: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 96% · As of October 2026

Sonnergie AG scores 71.4 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.76.724%
  • 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.45.610%
  • 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.88.08%
Sonnergie AG scores 64.1 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.50.012%
  • 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.55.07%
Sonnergie AG 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%
Sonnergie AG scores 9.1 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 35.9.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Sonnergie AG reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 5 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 5 reviews across all connected sources

Sources
GGoogle55
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Gernstrasse 1
8311 Brütten
Opening hours
Mon
08:00 - 12:00, 13:30 - 17:00
Tue
08:00 - 12:00, 13:30 - 17:00
Wed
08:00 - 12:00, 13:30 - 17:00
Thu
08:00 - 12:00, 13:30 - 17:00
Fri
08:00 - 12:00, 13:30 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-337.635.128
Founded
2023 · 3 years
Last commercial register change
April 11, 2023
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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