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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsWindlachQ.Sol GmbH
Q.Sol GmbH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Q.Sol GmbH is the conception, implementation and economic operation of solar systems on the roofs of properties. The company offers solar contracting and roof rental, where it takes over the financing, construction and maintenance of the solar systems and offers property owners a fixed electricity price or an annual roof rental fee.

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Offering

Products & services

Industry:Solar & Photovoltaics
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3.8/5

Q.Sol GmbH

✓ Offered
3
Solar contracting
Solar contracting for photovoltaic systems on industrial, commercial and service buildings; financing, design, implementation, operation, maintenance and marketing of solar power via vZEV, LEG or the balancing energy market.
Roof rental
Roof rental for large roof areas with low self-consumption; feed-in of solar power into the grid, a long-term roof usage agreement and annual roof rent for the owner.
Consulting
Consulting for solar systems and roof use; tailored solutions based on experience and network, including technical clarification regarding the project and implementation.
Trust & reputation

ranQ Trust Score of Q.Sol GmbH: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

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Data basis 54% · As of October 2026

Q.Sol GmbH 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.
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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%
Q.Sol GmbH scores 61.5 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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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%
Q.Sol GmbH 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%
Q.Sol GmbH scores 4.6 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 35.4.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Q.Sol GmbH reaches a ranQ Trust Score of 3.8 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.

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Location

Schulstrasse 12
8175 Windlach

At a glance

Legal form
Limited Liability Company
UID
CHE-235.797.529
Founded
2023 · 3 years
Last commercial register change
October 13, 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.
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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