Standards Development Process

The SSI follows a concise but collaborative process when considering and implementing new standards in accordance with the International Social and Environmental Accreditation and Labelling Alliance Standard-Setting Code.

1. Initial Development

SSI expert analysts and advisors work together with the Stakeholder Advisory Group and the SSI Members’ working groups to craft innovative and impactful standards that reflect the latest advancements in solar technology and environmental stewardship.

The SSI Secretariat meticulously researches and analyses industry trends, emerging technologies, and best practices to ensure our standards set the bar for sustainability in the solar sector. The initial SSI ESG Standard was developed by the SSI Sponsors Group and supported by a public consultation period in 2023.

2. Pilot Audits

Once SSI Standards take shape, the Secretariat initiates the piloting phase. This step involves real-world testing of our standards. Through comprehensive audits, we evaluate the practicality and effectiveness of the standards in diverse operational scenarios.

This hands-on approach allows us to refine and optimise SSI Standards based on actual industry conditions, ensuring they are not theoretical ideals but actionable guidelines that positively impact solar companies, products, and projects.

3. Public Multi-Stakeholder Consultation

For the SSI, inclusivity is paramount. The public consultation phase opens the floor to stakeholders, including civil society, academia, industry professionals, environmental advocates, and the public at large.

This transparent and collaborative process invites valuable feedback, suggestions, and insights. We believe in the power of collective wisdom, and your contributions play a crucial role in shaping the final process.

4. Regular Reviews

It is the intention of SSI regularly to review its Standards for continued relevance and effectiveness in meeting its stated objectives.

Call for Participation: ESG Standard Working Group

Help shape the future of sustainability in the solar industry

The Solar Stewardship Initiative (SSI) will be revising its ESG Standard in 2026. To support this process, we are convening a multi-stakeholder ESG Standard Working Group (ESG SWG) and invite individuals with relevant expertise and perspectives to express their interest in joining.

About the Working Group
The ESG Standard Working Group will serve as the central forum for drafting, revising, and reviewing the content of the SSI ESG Standard. The group will play a critical role in ensuring that the revised standard is practical, robust, and aligned with international best practices and stakeholder expectations.

Who should apply?
This call is open to SSI Members, SSI SAG Members and SSI Approved Assessment Bodies. We welcome applications from individuals with expertise or experience in the following areas:

  • ESG risk management and due diligence
  • Responsible sourcing of minerals
  • Human rights, labour rights, and environmental sustainability
  • Solar manufacturing and supply chain management
  • Civil society, advocacy, and community engagement
  • International sustainability standards (ISEAL, OECD, UNGPs, etc.)

How to apply:
This call is open to SSI Members, SSI SAG Members and SSI Approved Assessment Bodies. Please get in touch with us to show your interest in joining the SSI ESG Standard Working Group. Deadline is 30 Nov 2025.

SSI encourages participation from diverse geographies, sectors, and stakeholder groups. All members serve in a personal capacity. You can read the terms of reference for the SSI ESG Standard Working Group here.

The development of the SSI ESG Standard

The SSI ESG Standard began its life as the draft SSI Code, and was developed with the support of supply chain and experts across environmental, social, and governance disciplines, and is based on internationally recognised standards and guidelines.

Prior to publication in October 2023, the SSI ESG Standard underwent review, pilot testing, and public multistakeholder consultation. The resulting Standard is intended to act as a one-stop-shop for solar companies to evaluate their ESG compliance, through independent assessors.

Pilot assessments were conducted in Q1-Q3 2023 by qualified auditors of the SSI Secretariat, at 14 sites in Europe and China. The public multistakeholder consultation ran from 17 May 2023 until 12 July 2023.

You can read the anonymised results from the pilot and consultation here.

The development of the SSI Supply Chain Traceability Standard

Prior to publication in December 2024, the SSI Supply Chain Traceability Standard underwent review, pilot testing, and public multi-stakeholder consultation. Designed to serve as a comprehensive resource for solar companies, the final Standard enables independent assessors to evaluate transparency compliance effectively.

Pilot assessments were conducted in Q1-Q3 2024 by TDi Sustainability, at 14 sites. The public multistakeholder consultation ran from 21 August 2024 until 21 October 2024. You can read the anonymised results from the pilot and consultation here.