SONNWINN

References

A selection of projects we have worked on as independent experts for photovoltaics and battery storage. We name clients only with their consent; the examples are therefore described without names or exact locations.

Experience

Since 2021 we have prepared glare assessments and statements for more than 1,300 projects, as well as more than 70 yield assessments, more than 60 noise assessments (mostly for battery storage), more than 50 technical inspections and acceptances, more than 40 drainage assessments, more than 20 consulting assignments, more than 10 decommissioning cost analyses and more than 10 technical due diligences. The projects are located in all 16 German federal states and abroad.

Project examples

  • Aerial view of a ground-mounted PV plant directly next to a motorway

    Glare assessment

    Ground-mounted PV, approx. 50 MWp

    Lower Saxony · 2026

    Motorway, state road and residential buildings assessed in one report, including the glare protection measures already planned.

  • View from an aircraft window of reflections from photovoltaic systems on the ground

    Glare assessment for aviation

    PV system near an airport

    United Kingdom · 2026

    Assessment of possible glare for flight operations, report written in English.

  • Open battery cabinets with stacked battery modules in a plant room

    Noise assessment

    Five battery storage systems, 10 MW / 20 MWh each

    Bavaria · 2026

    Noise forecasts in accordance with TA Lärm for a series of storage sites of one project developer.

  • Drone above a module field of a photovoltaic system

    Yield assessment and technical due diligence

    Three ground-mounted PV plants, approx. 96 MWp in total

    Mecklenburg-Western Pomerania · 2025/2026

    Yield assessment, document review, site visit and acceptance for a portfolio; yield assessment updated with the final components.

  • Bundled string cables on the mounting structure during construction

    Technical due diligence and construction progress monitoring

    Ground-mounted PV, 28 MWp

    Netherlands · 2025

    Technical assessment of the project and monitoring of the construction work during the construction phase.

  • Rows of single-axis trackers with bifacial modules on a meadow

    Review of tracking behaviour

    PV plant with single-axis trackers, 12 MWp

    Hungary · 2025

    Check whether the module tracking works as intended.

  • Module field on a roof during the acceptance inspection

    Technical inspection and acceptance

    Rooftop PV, 923 kWp

    Brandenburg · 2024

    On-site acceptance inspection of the completed installation.

  • Aerial view of a ground-mounted photovoltaic plant between fields and tracks

    Drainage assessment

    Ground-mounted PV, approx. 40 MWp

    Bavaria · 2026

    Assessment of rainwater run-off, together with the glare assessment for the same plant.

  • PV module damaged by fire among debris on the ground

    Damage assessment

    PV system, 56 kWp

    Saxony-Anhalt · 2024

    Assessment of the installation after a fire.

The photos show the respective installation or a comparable one.

Projects in Germany and internationally

A selection of our projects in Germany and the countries in which our experts have also inspected and assessed installations – in Europe, Asia, Africa and the Americas.

Germany · by district
SONNWINN GmbH projects in Germany Map of Germany with 1309 projects in 313 districts; dots at the district centre, size by number, colour by type of service. 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  • Assessments
  • Technical inspections
  • Planning and consulting
International · more than 25 countries
Countries with SONNWINN GmbH projects World map: countries in Europe, Asia, Africa and the Americas in which SONNWINN has inspected or assessed installations are highlighted.

Our services are described in detail under Services. You can send an enquiry using the form below, by phone or by email.

Enquiry

Use the form, call us on +49 4103 121 4221 or write to kontakt@sonnwinn.de – whichever suits you best.

You do not need to attach documents to your enquiry – once we have received it, we will help you put together the documents required.

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