The Solar Stewardship Initiative is open for membership. As of 2024, over 40 organisations active in the solar industry and/or supply chain responsibility are members of the Solar Stewardship Initiative.
Becoming a member of the SSI signifies a commitment to the SSI Principles. Manufacturing sites achieve certification by successfully completing the SSI assurance process, which includes an initial independent assessment within the first 12 months of joining. At present, the SSI does not certify products, although product certification may be introduced in the future. The SSI does not certify companies.
