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VDE Renewables GmbH

Siemensstrasse 30

63755 Alzenau | Germany

Phone: +49 69 6308 5300

Fax: +49 69 6308 5320


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Looking for Studies, Position Papers or Standards?

> VDE Verlag

In the Shop of the VDE Publishing House you will find electrotechnical safety standards and books.

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utility scale
VDE Renewables
2021-06-08 page

Technical Due Diligence for PV Projects

Do you want your power plant’s site, design components, O&M regime, commissioning process, or rated output to be verified? VDE can provide you with independent certification, along with technical advice to maintain standards. 

Working with VDE allows you to benefit from years of experience and ensure that critical aspects of your projects are reviewed efficiently, and on time.   

By working with us, your project can receive the VDE quality mark, which signifies that your project has exceeded technical standards through a transparent evaluation. Your pursuit of high quality will be recognized by third parties as a result! 

Have a look at our due diligence services below and see how they benefit you.


We can support you across the following topics: 

  • Project Agreements Review 
  • Site Review
  • System Design & Major Equipment Review 
  • Energy Production Estimate 
  • Permits, Plans and Approvals
  • Financial Review 
  • Construction Oversight + On-site Inspection 
  • Project Acceptance Advisory + On-site Inspection 
  • Procurement & Logistics 
  • Operations & Maintenance 
  • PV Power Plant Certification (Premium Option) 
Contact us

Case Study of VDE ‘s Utility Scale Projects Implementation

USD 7-digit losses after only 4 years of operations of 18MV PV plant - due to low quality 

VDE Renewables was tasked to look at a 18 MW PV plant featuring central converters in the UK after performance of the system started declining after only 4 years of operations. 

Inspection of the PV plant determined that the DC transmission cables were buried directly into the ground, but the cables were not rated for this type of application and started to fail. The remediation required 5km of trenches to be dug up and 66km of new and properly-specified cables to be put in place. 

A key lesson learned by the plant owners was that a comprehensive assurance assessment (which includes cable-related checks) conducted before the project was commissioned. could have prevented the high remediation costs.

Comparing costs: The costs for cable replacement was about EUR 1.5 million. Only EUR 60k would have been required at an earlier stage of the project to avoid a cost of EUR 1.5 million after 4 years. However, even after 4 years the investment of EUR 1.5 million was a good investment to fix the plant as any more year of operations would have increased the losses for the plant owners.

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VDE Renewables