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Energy storage system certification

Comprehensive certification of energy storage systems delivers maximum stakeholder confidence


The number of wind and solar installations on different scales is increasing globally. Also, their relative share in the electricity generation mix is increasing. The intermittent nature of these renewable energy sources poses challenges in terms of electrical grid congestions regarding voltage and frequency instabilities on different scales in the power system.

To counter the intermittency or the impact of renewables on the power grid, grid-connected electrical energy storage systems (EESS) are being rapidly developed and deployed. Also EESS which are not connected to the grid supporting large industries or islands with power are used more and more.

The success of these EESS requires clarity and widespread agreement among stakeholders that joint guidelines and standards are being applied in consistent and transparent way to ensure safety, performance and consider environmental impact.

Our offer to you

DNV has developed an accredited certification approach which aims to accelerate a safe and sound implementation of electrical energy storage systems, by providing a framework for certification of safety, operation and performance of electrical energy storage systems.

The certification approach consists of the three main certification services:

  • Certification according to specific publicly available guidelines

This is an optional certification possibility to state compliance according to a specific scope defined by standards/guidelines applicable to the EESS. These may be IEC or/and UL standards or any other publicly available standard/guideline e.g. VDE guidelines.

Client proposes applicable standard/guideline or set of it to DNV including detailed description of product and corresponding application. DNV will review proposal and define set of requirements as given by proposed standard/guideline or set of it considering product and corresponding application.

Following a successful completion of the verification of the specific scope, DNV shall issue a Statement of Compliance. The result can be included in Type and Project Certification service.

  • Type Certification

The Type Certification is relevant for mass-produced components used in an Energy Storage System, and it includes the following mandatory and optional phases, depending on the component:

    • Design Basis Assessment (optional)
    • Design Assessment of the component(s)
    • Type Test results assessment of the component(s)
    • Assembly inspection of the Energy Storage System (optional phase).

Type certification

  • Project Certification

The Project Certification covers the application of several certified components for a specific Energy Storage System project and includes the following mandatory and optional phases:

    • Conceptual design assessment of the energy storage system (optional phase)
    • System Design Assessment of the energy storage system and verification of the compatibility with installation site requirements
    • Assembly surveillance of the energy storage system
    • Witnessing of commissioning of the energy storage system.

Project certification

Your benefits

  • Distinguish your product from the competition
  • Provide confidence to your end users and investors
  • Prove and quality and safety
  • Reduce risk through third party verification/certification
  • Decrease costs in the installation phase through risk mitigation in an early stage
  • Mitigate risks in your design and gaps in your documentation in early stages to save time

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