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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint747,212 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentPhotovoltaicsBaselSonnwende GmbH
Sonnwende GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Sonnwende GmbH plans and installs photovoltaic systems and solutions for solar energy storage and electric mobility. It advises residential and business customers and coordinates renewable heating solutions in cooperation with its sister company.

AI-generated
Presence

Service area

Offering

Products & services

Industry:Photovoltaics
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4.3/5

Sonnwende GmbH

✓ Offered5
Photovoltaic systems
Photovoltaic systems for roof-mounted, roof-integrated and flat roofs, including consulting, design, installation and commissioning; also systems on facades, carports, noise barriers and balcony railings.
E-mobility solutions
E-charging stations for home and for businesses, with pre-installation for new builds as well as intelligent charging stations that can be connected to photovoltaic systems and energy management.
Solar power storage and energy management
Solar power storage, energy managers and related system integration to optimise self-consumption and to use solar power for large consumers and electric vehicles.
Hot water preparation with solar energy
Hot water preparation with a heat pump or electric element in the boiler, so that solar energy can also be used for providing hot water.
Design and overall coordination of PV and e-mobility projects
Advisory services, design, technical project management and administrative handling of solar system and e-mobility projects; if desired, including grant applications and coordination of all work from a single source.
Trust & reputation

ranQ Trust Score of Sonnwende GmbH: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of November 2026

Sonnwende GmbH scores 89.8 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.92.624%
  • 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.92.510%
  • 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%
Sonnwende GmbH scores 68.3 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.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.82.07%
Sonnwende GmbH scores 86.7 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).86.722%
Sonnwende GmbH scores 37.1 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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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 35.37.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Sonnwende GmbH reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 out of 5 stars from 37 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of November 2026.

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

Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 37 reviews across all connected sources

Sources
GGoogle537
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Auf dem Wolf 45
4052 Basel
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
Limited Liability Company
UID
CHE-204.284.748
Founded
2023 · 3 years
Last commercial register change
May 13, 2026
Employees
21 to 50

Active in 1 of 26 cantons · 1 municipality

  • BSBasel
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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