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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

  • 1,400+expert reports and statements since 2021
  • 700+PV plants technically inspected
  • 40+designs for solar parks and storage
  • 25+countries

Since 2021 our experts have prepared more than 1,400 expert reports and statements – on glare, yield, revenue, noise, drainage and decommissioning costs –, more than 40 designs for solar parks and battery storage, as well as technical inspections and acceptances, technical due diligences and consulting assignments. Our projects are located throughout Germany and in more than 25 other countries. Over their entire careers, our experts have carried out technical inspections of more than 700 PV plants.

Project examples

  • Result charts from the glare assessment: reflection periods by month and time of day and reflection duration per day for one observation point

    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.

  • Result chart from the aviation glare assessment: periods with reflections for the approach, all outside the pilots' relevant field of view

    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.

  • 3D model of one of the plants from the yield simulation with module rows and shading trees

    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.

  • Slope map from the drainage assessment with contour lines and the plant's sub-areas

    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.

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.

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