Solar TDD, Engineering and Owner Engineering

Kiwa, through the group members Kiwa Moroni and PI Berlin, perform complete technical services on renewable energies production plants, assisting investors in order to increase the profitability and the value of their green investment over the time.

What is Technical Due Diligence (TDD)?

Technical due diligence (TDD) is a complete examination of a certain product or complete system. The full scope of a TDD includes an assessment of the design, suitability, performance, and quality of the components and plant. Technical due diligence may also include the technical assessment of the permitting and grid connection process. The results of the TDD provide you with crucial information about the condition, potential risks and associated mitigation measures of the asset.

A TDD assessment can be useful in various situations, for each phase of a project life cycle. On the one hand the TDD can be interesting in the development phase to assist the decision whether or not an investment in a solar PV project should be made. For operational plants, a TDD is used for the assessment of PV plants for transactions or re-financing process. Our systematic approach emphasizes the evaluation of performance and quality (not only compliance) aspects, which are critical to maximize the project’s financial returns.


Kiwa provides engineering services for solar PV plants during the development, construction and operation phases. We can support your PV project by conducting feasibility and yield studies as well optimized conceptual designs to ensure the lowest LCOE. In addition, we provide complete engineering services for the construction of PV plants. If an EPC is used, we can act as the owner’s engineer or lender’s technical advisor to ensure that the PV plant is built according to contractual and regulatory requirements. Our experts actively collaborate with leading banks and investment funds, as well as with those who require an independent audit to protect their investment.

Owner Engineering

Kiwa, through Kiwa Moroni, assists their customers with an independent technical support during the procurement phase, the EPC contracting, the project construction and the provisional, intermediate and final acceptance procedures:

  • Assistance during EPC/O&M selection and contracting
  • Design review
  • Construction monitoring also by drone inspections
  • Review of the commissioning and acceptance tests (PAC – FAC)
  • Independent instrumental tests
  • Site visit and punch-list drafting


  • Explore Kiwa PVEL's PV module testing services, going beyond PQP to ensure consistency and performance indoors and outdoors.
  • Unlock actionable insights and forecasts with Kiwa PVEL's data and consulting services, empowering your solar and energy storage procurement strategies.
  • PV Analyzer (PVA) is designed for quick deployment at a potential project site to collect the energy yeild and environmental data, which can be applied for financial model and PVsyst simulation model.
  • Kiwa, through the group member Kiwa Moroni, executes the permission process, the design, the construction surveillance and the safety of power plants, supporting investors and EPC contractors in the choice of sustainable energy saving solutions.
  • The collaboration between CRU, Exawatt, and PVEL offers comprehensive insights into energy storage markets, enabling informed strategic decisions.
  • Explore Kiwa PVEL’s Product Qualification Program (PQP) to mitigate PV module procurement risk with actionable insights from bankability tests.
  • Kiwa PVEL's top-tier facilities provide comprehensive module testing services for manufacturers, developers, investors, EPCs, and industry stakeholders.
  • Kiwa, through Kiwa Moroni, carries out consultancy activities and instrumental analyses on operating energy plants, including the ones still in the process of realization, cooperating actively with leading banks and investment funds, investors requiring an independent audit to protect their energy investments.