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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryFinance & InsuranceHolding CompaniesZofingenErhard Keller Verwaltungs AG
Erhard Keller Verwaltungs AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Erhard Keller Verwaltungs AG provides electrical installation services for industrial, commercial, service and residential buildings and offers solutions for lighting, communication systems and smart home integration. The company also operates a specialist shop and provides services such as emergency support, security checks and telephone & internet solutions.

AI-generated
Offering

Products & services

Industry:Holding Companies
✓ Offered8
Electrical Installations
Electrical installations, power systems, low-voltage systems, distribution boards, household appliances, small jobs, maintenance and repairs in industrial, commercial, service and residential buildings.
Lighting Installations
LED lighting, indirect luminaires, lighting systems, outdoor lighting as well as lighting design, installation, commissioning, renovation and intelligent lighting controls.
Communication Solutions
Consulting, design, implementation, documentation, sales, installation, maintenance and repair of communication systems and IT networks, including telephony, internet, WLAN and home communication.
Smart Home
Networked home automation with individual light and shutter controls, KNX, Zeptrion and Sonos, and operation via internet or apps.
Electrical Engineering
Planning of complete electrical engineering installations for the building, consulting, tendering, lighting design, detailed engineering for communication and IT systems, building automation and expert reports.
Immediate Assistance
Service and repair for power outages, faults and defects, new components, replacements and fast help for electrical problems.
Inspection and Safety
Periodic inspections, safety certification SiNa, testing of plant components, measurements and rectification of defects for electrical installations.
Telephony and Internet
Activation of IP connections, new connections and changeovers, setup of end devices for telephony, internet, TV and PC.
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4.4/5

Erhard Keller Verwaltungs AG

Trust & reputation

ranQ Trust Score of Erhard Keller Verwaltungs AG: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 96% · As of October 2026

Erhard Keller Verwaltungs AG scores 84.4 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.82.424%
  • 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.80.810%
  • 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.95.08%
Erhard Keller Verwaltungs AG scores 85.5 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.100.012%
  • 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%
Erhard Keller Verwaltungs 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%
Erhard Keller Verwaltungs AG scores 20.0 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 35.20.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Erhard Keller Verwaltungs AG reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.8 out of 5 stars from 23 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
4.8
of 5

Aggregated from 23 reviews across all connected sources

Sources
GGoogle4.823
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Untere Brühlstrasse 34
4800 Zofingen
Opening hours
Mon
07:00 - 12:00, 13:15 - 16:30
Tue
07:00 - 12:00, 13:15 - 16:30
Wed
07:00 - 12:00, 13:15 - 16:30
Thu
07:00 - 12:00, 13:15 - 16:30
Fri
07:00 - 12:00, 13:15 - 16:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-105.778.857
Founded
1965 · 61 years
Last commercial register change
April 10, 2026
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.
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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