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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsSeuzachEnergiewendegenossenschaft Region Winterthur
Energiewendegenossenschaft Region Winterthur Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The company ERW (Energiegenossenschaft Winterthur) is a non-profit cooperative that specializes in planning, consulting and supporting self-construction projects for photovoltaic systems (solar systems). The core activity of the company is to offer its members the opportunity to build and operate their own solar systems by providing expert advice, energy calculation, visualization, financing and installation support. The members are also the builders and can contribute to the realization of their systems through their own labor.

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Offering

Products & services

Industry:Solar & Photovoltaics
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4.4/5

Energiewendegenossenschaft Region Winterthur

✓ Offered11
DIY PV systems
DIY PV projects with guidance from site supervisors and system planners; members actively help and contribute working hours to other installations.
Turnkey PV systems
Turnkey installation of PV systems without active assistance from the client; planning and implementation from a single source.
In-roof PV systems
Planning and construction of aesthetically coordinated in-roof PV systems that blend appropriately into the surroundings.
Facade solar installations
Design and implementation of PV systems on building façades, in particular for the use of winter electricity.
PV systems on multi-family houses
Planning and construction of large PV systems on multi-family houses so that tenants or the condominium community can use solar power.
Large-scale systems on agricultural buildings
Planning and construction of large-scale systems on agricultural buildings.
Advisory on LEG, ZEV, vZEV and energy management
Professional advice on LEG, ZEV, vZEV as well as on energy management and the associated systems.
Solar courses
Two-day courses on building solar systems yourself, with practical knowledge, discussion, and the course location at Technopark Winterthur.
Information events and autumn events
Information events with talks, exchange sessions and presentations on sustainable energy, PV and current framework conditions.
Membership in the cooperative
Cooperative members can build their own PV system with ERW on favourable terms.
Transport drone for solar module installation
Use of a transport drone that efficiently and precisely flies PV modules onto the roof.
Trust & reputation

ranQ Trust Score of Energiewendegenossenschaft Region Winterthur: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 96% · As of October 2026

Energiewendegenossenschaft Region Winterthur scores 80.9 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.84.324%
  • 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.74.910%
  • 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%
Energiewendegenossenschaft Region Winterthur scores 84.4 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.83.012%
  • 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%
Energiewendegenossenschaft Region Winterthur 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%
Energiewendegenossenschaft Region Winterthur scores 48.6 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 35.48.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Energiewendegenossenschaft Region Winterthur reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.9 out of 5 stars from 18 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
4.9
of 5

Aggregated from 18 reviews across all connected sources

Sources
GGoogle4.918
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Mettlenstrasse 6b
8472 Seuzach

At a glance

Legal form
Cooperative
UID
CHE-448.976.255
Founded
2017 · 9 years
Last commercial register change
June 10, 2026
Employees
21 to 50
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.97.06%
  • 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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