ranQ
ranQ
ranQ
DirectoryIndustriesPlacesKnowledgeComparisonsSoon
Sign inCheck visibility
ranQHSG Startup LabelRecognised by the
HSG Startup Label

The leading AI company directory, built to boost AI visibility.

DEENFRIT
Product
  • Pricing
  • Directory
  • Industries
  • Trust Score
Company
  • About
  • Contact
  • Legal
© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsOltenDD Solar GmbH
DD Solar GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of DD Solar GmbH is the planning, implementation and maintenance of solar systems for private households, companies and public institutions, with a focus on innovative and sustainable solar technologies and photovoltaic systems.

AI-generated
Offering

Products & services

Industry:Solar & Photovoltaics
✓ Offered
LeadhubOutbound Leads by COHAGA

Looking for direct email addresses and phone numbers?

Leadhub delivers verified contact details and decision-makers from over 750,000 Swiss companies — management, procurement, marketing, HR.

Discover Leadhub
4.1/5

DD Solar GmbH

5
Solar systems
Photovoltaic systems for roofs, façades as well as balcony and terrace installations; from advice and planning through installation to commissioning.
Energy storage
Battery storage and storage capacities, backup power solutions and self-sufficiency for using solar power, more self-consumption and greater independence from the grid.
EV charging stations
Wallboxes and charging stations for electric vehicles at home or at the company, with safe installation and intelligent control.
Maintenance, service and cleaning
Maintenance, plant inspections, repairs and cleaning to optimise yield, so solar systems remain efficient and reliable in the long term.
Photovoltaic contracting
Contracting for solar power systems with planning, financing, installation, operation and maintenance without own investment costs.
Trust & reputation

ranQ Trust Score of DD Solar GmbH: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

DD Solar GmbH scores 81.2 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.84.824%
  • 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.67.110%
  • 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%
DD Solar GmbH scores 61.5 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.50.012%
  • 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%
DD Solar GmbH scores 83.3 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).83.322%
DD Solar GmbH scores 9.1 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 35.9.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

DD Solar GmbH reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 13 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 13 reviews across all connected sources

Sources
GGoogle513
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

No knowledge articles yet

Once DD Solar GmbH has claimed this profile, we'll publish editorial articles and case studies here together.

Get started
Comparisons

DD Solar GmbH in comparison

Soon

Industry comparisons are coming soon

We're preparing industry comparisons that rank DD Solar GmbH by reviews, experience and specialisations.

Is this your company?

Claim the company profile of DD Solar GmbH to make its contact details visible. With a plan we additionally create and publish industry comparisons, articles and much more.

Secure profile

Location

Solothurnerstrasse 141
4600 Olten

At a glance

Legal form
Limited Liability Company
UID
CHE-492.198.372
Founded
2023 · 3 years
Last commercial register change
September 4, 2025
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

    Similar companies

    HP
    Hansesun Photovoltaik Swiss GmbH
    Olten
    KE
    K1 Elektro AG
    Büsserach
    EE
    ERSAP Energie AG
    Feldbrunnen
    TG
    Tirasol GmbH
    Kyburg-Buchegg
    SG
    Südsolartechnik GmbH
    Balsthal
    EG
    Elektro Grimbichler
    Gempen
    PG
    Plattenstrom GmbH
    Grenchen
    UG
    usol GmbH
    Lohn-Ammannsegg