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

About the company

The core activity of ZENNA AG is the consulting, planning and implementation of solar and storage projects, including the execution of feasibility studies, analyses, design, tendering, project management and supervision in the field of renewable energies.

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Offering

Products & services

Industry:Solar & Photovoltaics
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ZENNA AG

✓ Offered
12
Solar consulting
Tailored consulting on photovoltaic issues, including strategies and concepts, verification of calculations and studies, system visualization, hardware evaluation, and bid review.
Energy storage consulting
Tailored consulting on storage and battery topics, including strategies and concepts, verification of calculations, system visualization, hardware evaluation, and bid review.
Solar strategy
Analysis of the starting situation of companies, municipalities, or cities regarding photovoltaics, including a study, workshop, and a catalogue of measures to implement a sustainable strategy.
Energy storage strategy
Analysis of the positioning of energy utilities, municipalities, or cities regarding energy storage, including a study, workshop, and a catalogue of measures for implementation.
Solar project management
Client representation for the construction of photovoltaic systems, from permits and design through construction coordination and quality control to commissioning, acceptance, and documentation.
Energy storage project management
Client representation for the construction of energy storage systems, from permits and design through construction coordination and quality control to commissioning, acceptance, and documentation.
Solar pre-study
Pre-study to assess photovoltaic projects and to prepare the subsequent strategy and engineering work.
Energy storage pre-study
Pre-study to assess energy storage projects and to prepare the subsequent strategy and engineering work.
Solar roof analysis
Roof analysis as a basis for designing a photovoltaic system optimized economically and technically.
Energy storage construction project
Engineering of an energy storage construction project as a basis for implementing an energy storage system.
Solar off-grid
Consulting and workshops on photovoltaic off-grid topics in the know-how area.
Energy storage off-grid
Consulting and workshops on energy storage off-grid topics in the know-how area.
Trust & reputation

ranQ Trust Score of ZENNA AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

ZENNA AG scores 60.4 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.70.824%
  • 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.27.910%
  • 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.70.08%
ZENNA AG scores 88.3 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.97.712%
  • 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.70.07%
ZENNA AG scores 85.0 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).85.022%
ZENNA AG scores 37.1 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 35.37.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

ZENNA AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 2 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 2 reviews across all connected sources

Sources
GGoogle52
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Alte Spinnerei 16
8877 Murg
Opening hours
Mon
08:00 - 16:00
Tue
08:00 - 16:00
Wed
08:00 - 16:00
Thu
08:00 - 16:00
Fri
08:00 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-357.874.765
Founded
2012 · 14 years
Last commercial register change
December 7, 2020
Employees
11 to 20
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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