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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringBuchs SgAES Alternative Energie Systeme GmbH
AES Alternative Energie Systeme GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Alternative Energie Systeme GmbH (AES) is consulting, planning and implementing highly efficient energy systems in buildings, as well as providing energy-efficient products and corresponding knowledge transfer. The company focuses on the areas of heat management, energy management and energy efficiency, offering products such as stratified storage tanks, fresh water stations, solar thermal systems and photovoltaics.

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Offering

Products & services

Industry:Technical Consulting & EngineeringSolar & Photovoltaics
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AES Alternative Energie Systeme GmbH

✓ Offered8
Heat management
Thermal energy flows in buildings; connection of heat generators and heat consumers with hydraulics and control engineering, including consulting, planning, implementation and outsourcing of planning assignments.
Energy management
Energy management in buildings; coordination of plumbing, heating and electrical systems to reduce energy consumption and costs, including consulting and implementation.
Energy efficiency consulting
Consulting and knowledge transfer on energy efficiency; sound support for energy-efficient systems and the use of physically sensible solutions.
Stratified charge storage
Layer charging storage systems for energy-efficient domestic hot water and heating systems; sizing, application and delivery instead of conventional heating storage tanks.
Fresh water stations
Fresh water stations for hygienic and energy-efficient domestic hot water production; sizing, commissioning and maintenance instead of conventional boiler solutions.
Solar thermal and photovoltaics
Solar thermal and photovoltaic solutions for buildings; use of solar energy as a thermal or PV solution and integration into energy-efficient systems.
Consulting, design and implementation of energy systems in buildings
Consulting, design and implementation of highly efficient energy systems in buildings; support for clients, planners, installers and general contractors for new build and refurbishment.
Seminars and training (AES Academy)
Standard training courses and individual training on stratified charge storage systems, fresh water stations and their application in planning and implementation.
Trust & reputation

ranQ Trust Score of AES Alternative Energie Systeme GmbH: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

AES Alternative Energie Systeme GmbH scores 65.7 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.70.024%
  • 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.45.610%
  • 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.78.08%
AES Alternative Energie Systeme GmbH scores 83.0 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.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%
AES Alternative Energie Systeme 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%
AES Alternative Energie Systeme GmbH scores 13.1 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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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 35.13.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

AES Alternative Energie Systeme GmbH reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.6 out of 5 stars from 5 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 5 reviews across all connected sources

Sources
GGoogle4.65
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Langäulistrasse 9
9470 Buchs Sg
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
Limited Liability Company
UID
CHE-114.518.203
Founded
2008 · 18 years
Last commercial register change
July 21, 2021
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.88.06%
  • 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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