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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsArognoEco-Optimum di Ing. André Roesti
Eco-Optimum di Ing. André Roesti Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Eco Optimum is the planning, installation and optimization of energy efficiency solutions for buildings, particularly in the field of renewable energies, such as photovoltaics, as well as the implementation of thermographic analyses for energy efficiency optimization.

AI-generated
Offering

Products & services

Industry:Solar & Photovoltaics
✓ Offered5
Design and installation of photovoltaic systems
Design and installation of grid-connected and stand-alone photovoltaic systems; technical feasibility assessment, subsidy application support, technical assistance and maintenance.
Energy optimisation of buildings
Energy audits and diagnostics to reduce waste and consumption; measures on heating and ventilation systems, building envelope, lighting, electric motors and standby.
LED lighting refurbishment
Refurbishment of lighting systems with LED technology for residential, commercial, private and industrial buildings, focusing on efficiency, durability and reduced energy consumption.
IR thermography
Non-invasive thermographic inspections for building envelope, air permeability, moisture, sanitary installations and electrical installations, detecting anomalies and faults.
Renewable energy
Assessment of the technical feasibility of plants using renewable energy sources and preparation of subsidy applications; includes photovoltaic, solar thermal, heat pumps and biomass.
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3.8/5

Eco-Optimum di Ing. André Roesti

Trust & reputation

ranQ Trust Score of Eco-Optimum di Ing. André Roesti: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of October 2026

Eco-Optimum di Ing. André Roesti scores 49.8 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.68.224%
  • 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.17.610%
  • 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%
Eco-Optimum di Ing. André Roesti scores 78.5 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%
Eco-Optimum di Ing. André Roesti 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%
Eco-Optimum di Ing. André Roesti scores 25.7 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 35.25.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Eco-Optimum di Ing. André Roesti reaches a ranQ Trust Score of 3.8 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 1 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 1 reviews across all connected sources

Sources
GGoogle51
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Stráda Növa 1
6822 Arogno
Opening hours
Mon
08:00 - 12:00, 13:30 - 17:30
Tue
08:00 - 12:00, 13:30 - 17:30
Wed
08:00 - 12:00, 13:30 - 17:30
Thu
08:00 - 12:00, 13:30 - 17:30
Fri
08:00 - 12:00, 13:30 - 17:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Sole proprietorship
UID
CHE-114.985.007
Founded
2009 · 17 years
Last commercial register change
August 3, 2009
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.67.06%
  • 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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