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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsChurNau Solar Systemtechnik GmbH
Nau Solar Systemtechnik GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of NAU Solar Systemtechnik GmbH is the planning, installation and sale of environmentally friendly energy systems, in particular: photovoltaic systems, heat pumps, solar thermal systems, storage technology, fresh water technology, wood heating systems, pellet tanks, mobile heating centers and solar roofs. The company also offers services such as installation, permitting and sales of energy systems and positions itself as a partner for environmentally friendly energy use in Switzerland.

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Products & services

Industry:Solar & Photovoltaics
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4.0/5

Nau Solar Systemtechnik GmbH

Photovoltaic systems
Photovoltaic systems from planning to a turnkey, operational plant, including consulting, sizing, administrative procedures, as well as coordination of the installation and incentives.
Heat pumps
Air-to-water and brine-to-water heat pumps, domestic hot-water heat pumps, as well as associated platforms and various capacities for heating and hot-water solutions.
Solar thermal
Solar collectors for domestic hot-water preparation and heating support, as flat-plate and tube collectors, as well as with individual collector solutions and various mounting options.
Storage technology
Buffer, domestic hot-water, hygienic, stainless-steel and combi storage tanks, as well as accessories and spare parts for heating and solar systems.
Fresh-water technology
Fresh-water stations, charging storage tanks and associated systems for hygienic hot-water preparation and storage tank connection.
Consulting
On-site consulting for heating with renewables, replacement of heating systems and photovoltaics, including analysis, system recommendation, cost estimate, incentive clarification and project support.
Heating consulting
Impulse consultation «heating with renewables» as well as renovation consulting for heat pumps, wood-fired heating and combinations with solar or photovoltaics.
Incentive grant consulting
Clarification of incentives, one-off payments and possible tax deductions within photovoltaic, heating and renovation projects.
Trust & reputation

ranQ Trust Score of Nau Solar Systemtechnik GmbH: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

Nau Solar Systemtechnik GmbH scores 62.3 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.65.024%
  • 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.49.510%
  • 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.70.08%
Nau Solar Systemtechnik 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%
Nau Solar Systemtechnik GmbH 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%
Nau Solar Systemtechnik GmbH scores 42.9 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 35.42.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Nau Solar Systemtechnik GmbH reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 4.3 out of 5 stars from 6 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
4.3
of 5

Aggregated from 6 reviews across all connected sources

Sources
GGoogle4.36
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Grossbruggerweg 4
7000 Chur

At a glance

Legal form
Limited Liability Company
UID
CHE-112.867.101
Founded
2006 · 20 years
Last commercial register change
August 18, 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.
88.0
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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