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

About the company

The core activity of KASTELER ENGINEERING GmbH is the planning and coordination of electrical systems, particularly in the areas of electrical planning, lighting planning, photovoltaic planning and coordination. The company provides comprehensive concepts and decision-making bases for energy efficiency, comfort and economic viability in construction and project ventures.

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Products & services

Industry:Solar & Photovoltaics
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3.8/5

KASTELER ENGINEERING GMBH

5
Electrical engineering planning
Planning of electrical installations and systems, needs-based dimensioning, cost-effectiveness analyses, SIA 108 partial phases, and concepts for power distribution, safety, communication and building automation systems.
Lighting design
Planning of indoor and outdoor lighting, lighting proofs/demonstrations according to SIA 387/4 and EN 111, Relux calculations, visualisations, and advice on controls and luminaires procurement.
Photovoltaic planning
Advisory services for the implementation of photovoltaic systems, feasibility studies, economic viability calculations, building permit applications, grant applications, construction support up to completion, and billing models.
Coordination
Technical coordination, overall coordination of electrical engineering and building services engineering, organisation and execution of integrated tests, and support during acceptance tests.
Expertise reports
Condition analyses, feasibility studies, cost estimates, needs analyses, life-cycle considerations, and advice on energy-technical issues and upcoming refurbishment of systems.
Trust & reputation

ranQ Trust Score of KASTELER ENGINEERING GMBH: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of October 2026

KASTELER ENGINEERING GMBH scores 51.4 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.66.724%
  • 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.35.08%
KASTELER ENGINEERING GMBH scores 76.0 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.75.012%
  • 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.70.07%
KASTELER ENGINEERING 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%
KASTELER ENGINEERING 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

KASTELER ENGINEERING GMBH reaches a ranQ Trust Score of 3.8 out of 5.0 — rated «High». The rating draws, among other things, on 4.5 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
4.5
of 5

Aggregated from 2 reviews across all connected sources

Sources
GGoogle4.52
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Seftigenstrasse 310
3084 Wabern

At a glance

Legal form
Limited Liability Company
UID
CHE-172.307.053
Founded
2019 · 7 years
Last commercial register change
September 9, 2026
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.
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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