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

About the company

Elektro Illi AG carries out electrical installations and solar-technology projects for private customers, commercial and industrial clients, and public clients, providing planning, implementation and inspection services.

AI-generated
Offering

Products & services

Industry:Solar & Photovoltaics
✓ Offered8
Photovoltaic systems
Photovoltaic systems for single-family homes, residential developments and commercial buildings; planning, installation, expansion, maintenance, cleaning as well as battery storage and façade or site solutions.
E-mobility / charging stations
Charging stations and charging infrastructures for electric cars; planning and installation for single-family homes, underground car parks, multi-family houses, residential developments as well as commercial and industrial buildings, also combinable with photovoltaics.
Building automation / smart home
Building automation and smart home solutions for single-family homes, residential developments and commercial buildings; control of lighting, heating, shading and scenes, also via app, with KNX and Loxone.
Electrical installations
Electrical installations for new builds and conversions, residential and office buildings, industrial buildings and special installations; lighting, security solutions, communication cabling as well as service and maintenance.
Electrical planning
Planning of electrical installations for new-build and conversion projects; support from strategic planning through to commissioning, as well as coordination with technical and economic requirements.
24/7 electrical emergency service
24-hour emergency service for power outages, short circuits, defective fuses, malfunctions in electrical systems and urgent repairs; reachable 365 days a year.
ICT infrastructure
ICT solutions for networks, communications and digital core infrastructures; structured network cabling in copper and fibre optics, network and multimedia connections, as well as planning and implementation.
Electrical inspections
Electrical inspections in accordance with NIV for electrical installations; organisation and support of the inspection, preparation of the safety report and assistance with rectifying defects.
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4.4/5

Elektro Illi AG

Trust & reputation

ranQ Trust Score of Elektro Illi AG: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 96% · As of October 2026

Elektro Illi AG scores 79.8 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.75.724%
  • 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.82.910%
  • 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.88.08%
Elektro Illi AG scores 92.3 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.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.82.07%
Elektro Illi 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%
Elektro Illi AG scores 34.3 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 35.34.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Elektro Illi AG reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.6 out of 5 stars from 25 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
4.6
of 5

Aggregated from 25 reviews across all connected sources

Sources
GGoogle4.625
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Seewag 2
6130 Willisau
Opening hours
Mon
07:00 - 12:00, 13:15 - 17:00
Tue
07:00 - 12:00, 13:15 - 17:00
Wed
07:00 - 12:00, 13:15 - 17:00
Thu
07:00 - 12:00, 13:15 - 17:00
Fri
07:00 - 12:00, 13:15 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-107.804.856
Founded
1978 · 48 years
Last commercial register change
April 28, 2020
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.
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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