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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsBollHOLDENER SOLAR, Umwelt- und Heizungstechnik
HOLDENER SOLAR, Umwelt- und Heizungstechnik Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Holdener Solar is the planning, installation and maintenance of renewable energy systems, in particular: solar water heating and heating support systems, thermal solar systems, photovoltaic systems, wood heating systems (pellets, wood chips, firewood) and air/water heat pumps. The company also offers maintenance and repair services for heating systems.

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Offering

Products & services

Industry:Solar & Photovoltaics
✓ Offered6
Solar hot-water systems
Solar hot-water systems for heating domestic hot water using solar energy; complemented by a heating system or electric operation when residual energy is required.
Solar heating support systems
Solar heating support systems for heating domestic hot water and supporting the central heating; implemented from 10 m2 of collector area.
Solar power generation, photovoltaic systems
Photovoltaic systems for solar power generation; conversion of sunlight into electricity, usually with an inverter connected to the public AC power grid.
Wood heating systems
Wood heating systems with pellets, chips and split firewood; consultation, planning of the refurbishment and installation of the new heating system.
Maintenance and repair work on heating systems
Maintenance and repair work on heating systems, in particular replacement of heating circulation pumps and upgrading of radiator thermostatic valves.
Air-/water heat pumps
Air-/water heat pumps to support projects in the field of renewable energy and heating technology.
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HOLDENER SOLAR, Umwelt- und Heizungstechnik

Trust & reputation

ranQ Trust Score of HOLDENER SOLAR, Umwelt- und Heizungstechnik

Trust Score

No score yet

x

A published score requires a data basis of at least 50% and data from at least two criteria groups other than identity. Missing evidence: Review quality, Review volume, Review recency, Media authority

Data basis 54% · As of October 2026

HOLDENER SOLAR, Umwelt- und Heizungstechnik 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.
x
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%
HOLDENER SOLAR, Umwelt- und Heizungstechnik scores 72.7 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.86.512%
  • 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%
HOLDENER SOLAR, Umwelt- und Heizungstechnik scores 83.3 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
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).83.322%
HOLDENER SOLAR, Umwelt- und Heizungstechnik scores 0.0 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 35.0.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%

The data basis is 54%, below the threshold at which ranQ publishes a score. Evidence is missing for: Review quality, Review volume, Review recency, Media authority. As of October 2026.

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

Knowledge

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Location

Moosgasse 32
3067 Boll

At a glance

Legal form
Sole proprietorship
UID
CHE-425.522.794
Founded
2016 · 10 years
Last commercial register change
May 10, 2024
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.67.06%
  • 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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