Technical Due Diligence & Special Inspections
Our TÜV and VdS-trained experts draw their experience not only from our own wide-ranging operational management portfolio, but also from the thousands of solar plants we have inspected and evaluated.
Our TÜV and VdS trained experts draw their experience not only from our own wide-ranging operational management portfolio, but the thousands of solar plants we have inspected and evaluated.
We support you when it comes to evaluating the condition of your system
When does a due diligence solar project & special inspection make sense?
A solar due diligence report by greentech will provide a practical view of the technical status of your plant. This knowledge enables an objective evaluation of the quality of service being provided by your business associates.
Additionally, a solar systems due diligence report can help you identify potential risks and weaknesses in your plant’s technical design or construction and can provide recommendations for improvements to optimize performance and maximize returns on your investment. Our team of experienced engineers and technical experts will thoroughly analyze your plant’s design, construction, and operation, and provide you with a detailed report that highlights any issues or areas of concern, as well as opportunities for optimization and improvement.
In addition to checking the plant on-site, we also do a thorough review of all technical documentation. Furthermore, we are able to conduct further analyses and simulations, so that you can consider all relevant information when thinking about the purchase of a solar power plant.
At greentech, our solar farm due diligence report goes beyond just on-site inspections. We meticulously review all technical documentation related to the solar power plant, including design plans, engineering reports, performance data, and operational records. Our team of experts will conduct thorough analyses and simulations to provide you with a comprehensive assessment of the plant’s technical status, performance, and potential risks.
By considering all relevant information, including on-site inspections, technical documentation review, and additional analyses, our solar due diligence report provides you with a holistic view of the solar power plant’s condition. This enables you to make informed decisions when considering the purchase of a solar power plant, ensuring that you are aware of any technical issues, risks, or opportunities associated with the investment. Our goal is to provide you with the knowledge and insights needed to make confident decisions and maximize the value of your solar project.
As part of our due diligence for solar PV projects inspection, our TÜV and VdS-certified PV experts provide an independent view of your photovoltaic plant. In the event of damage or warranties that are due to expire, their expert assessment will support you in making well-founded claims and ensuring your rights.
We take our due diligence services seriously and ensure that our TÜV and VdS-certified PV experts conduct a thorough and independent assessment of your photovoltaic plant. This not only helps you identify any potential issues with the plant but also ensures that you can make well-founded claims and protect your rights in case of any damages or warranty issues. Our experts will provide you with a detailed report outlining their findings and recommendations to help you make informed decisions about your solar PV project.
A due diligence solar inspection provides you with all the technical information that is relevant when selling your system. Alongside the examination of the technical documentation, we also offer several visual inspections of the installed components on-site, conduct thermographic examinations, or analyze the performance of the system in question, on the basis of the monitoring data that is available. This enables you to negotiate the best-selling price for your plant.
Our due diligence solar inspection services are designed to provide you with comprehensive technical information that is crucial when selling your solar PV system. In addition to reviewing the technical documentation, our experts conduct thorough visual inspections of the installed components on-site, perform thermographic examinations, and analyze the system’s performance using available monitoring data. This holistic approach ensures that you have a complete understanding of the condition and performance of your solar PV system, allowing you to negotiate the best selling price for your plant.
Our detailed report will provide you with the necessary information to confidently engage in selling discussions and maximize the value of your solar PV project.
What makes our technical due diligence & special inspection stand out in the crowd?

An independent view with a focus on quality and performance
Get the independent and unbiased view of a technically experienced PV specialist! We offer you a comprehensive overview of the technical quality of your plant and the potential performance levels.
Checks and inspections conducted by experts in the field
Our experienced technicians and engineers are TÜV and VdS-certified experts. They have already conducted a large number of inspections and assessments of solar systems, in compliance with the relevant legal requirements, norms and standards. Their many years of experience and technical expertise ensure that, wherever problems arise, suitable, practical solutions are found.


Concrete optimisation proposals that can be implemented quickly
You will receive our audit and inspection results, set out clearly and presented comprehensibly. In this way, we can discuss any necessary measures and further recommendations for action and implement them quickly. This way, we contribute to the efficient performance of your system and its long service life.
Discover our full range of services for technical due diligence & special inspections
Inspection of technical documentation
Visual inspection of the documentation for comprehensiveness according to DIN EN 62446 and best practice recommendations
Documentation and presentation of the results, based on the greentech documentation checklist
On-site inspection
Comparison with the planning documents
Visual inspection of PV generators, cabling and DC sub-distribution
Visual inspection of the inverter
Visual inspection of the transformer and the transfer station
Visual inspection of other system components
Thermography of the main components (random sample)
Verification of the commissioning documents
Comprehensive report and presentation of results
Deeper analysis options
Performance analysis of historical monitoring data
- e.g. in the context of trial operation or as in-depth analysis at regular intervals
- Evaluation of availability and PR guarantees
- Use of innovative and detailed analysis tools
String measurements according to DIN VDE 0126-23
Thermography of modules by drone
Thermographic examination of other electrical components
Electroluminescence measurement of PV modules
Why work with greentech?
we develop | we build | we service | new energy
1+ GM managed &
1+ GW inspected
100+ employees, including
TÜV/VdS certified experts
Experience from 400+ projects
and 10 countries
About greentech
Expertise Every Step of the Way – Across All Project Phases
greentech is an integrated PV specialist. The range of services includes project development, system design, construction, operation and management of PV power plants in Europe. In the area of operational management, we offer a full-service operational management concept for PV plants of all sizes with an interdisciplinary team of experienced experts, as well as services for planning, quality assurance and yield maximisation. With a comprehensive range of services and a current portfolio of more than 900 MWp in O&M, we are one of the largest independent service providers worldwide.
Your greentech specialists for technical due diligence

Senior Project Manager Sales & Business Development

Head of Engineering & Technical Advisory
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