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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentEnergy SuppliersZofingenStWZ Strom AG
StWZ Strom AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

StWZ Strom AG supplies electricity and related energy services, including retail electricity products, feed-in remuneration for solar power and Smart Meter solutions. The company also provides online customer services (billing, meter readings, customer portal) and advisory services on self-consumption and photovoltaic systems.

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Offering

Products & services

Industry:Energy Suppliers
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StWZ Strom AG

✓ Offered6
Electricity supply
Electricity supply in Zofingen and Strengelbach, including line construction and service connections, maintenance and upkeep of the electricity grid and installations, public lighting and a 24/7 on-call standby service.
Electricity products
Electricity products ECO, VARIA and REGIOSTROM; standard product ECO with 100 percent renewable electricity, VARIA with an annually changing mix, REGIOSTROM as regional renewable electricity.
Electricity generation and self-consumption
Generate electricity and use it yourself, with planning, consumption metering and billing; solar systems, charging stations, heat pumps and funding contributions for self-consumption.
Feed-in compensation for solar power
Compensation for solar power fed into the electricity grid based on the BFE’s quarterly reference market prices or the minimum compensation, depending on system size and self-consumption.
Smart meters
Installation of smart meters by 2027, including measurement and transmission of consumption and feed-in data, electronic meter reading and visibility in the customer portal.
Electricity prices and terms
Electricity prices from 2026 including energy, grid use, metering costs and charges; price lists, tariff information and supply of replacement electricity.
Trust & reputation

ranQ Trust Score of StWZ Strom AG: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 96% · As of October 2026

StWZ Strom AG scores 72.7 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.61.224%
  • 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.88.110%
  • 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%
StWZ Strom 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%
StWZ Strom AG 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%
StWZ Strom AG scores 94.3 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 35.94.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

StWZ Strom AG reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.2 out of 5 stars from 31 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
4.2
of 5

Aggregated from 31 reviews across all connected sources

Sources
GGoogle4.231
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Mühlegasse 7
4800 Zofingen
Opening hours
Mon
07:30 - 12:00, 13:30 - 17:00
Tue
07:30 - 12:00, 13:30 - 17:00
Wed
07:30 - 12:00, 13:30 - 17:00
Thu
07:30 - 12:00, 13:30 - 17:00
Fri
07:30 - 12:00, 13:30 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-109.367.269
Founded
2001 · 25 years
Last commercial register change
April 22, 2025
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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