Join the Solar Stewardship Initiative

The Solar Stewardship Initiative (SSI) is a multi-stakeholder initiative driving sustainability and responsible practices across the solar supply chain.

Our Standards provide a clear and practical framework for companies to achieve responsible business conduct in the solar sector. They address key environmental, social, and governance (ESG) criteria, enabling greater transparency, accountability, and continuous improvement across the value chain.

To learn more about the SSI Standards and how they are developed, as well as the governance processes that guide our work, visit our Standards and Governance pages.

As an SSI member, you will benefit from:

• The membership claims which demonstrate your commitment to sustainability and transparency in the solar value chain
• Access to SSI working groups, such as the Procurement Working Group, developing a Buyer’s Guide
• Participation in the development of future Standards and revision of existing ones through members surveys
• Biannual all members meetings where you receive updates on past and planned key activities
• Access to the SSI’s monthly Newsletter
• Access to the digital platform (once available)

The membership fee depends on your turnover. You will be asked to pay when you joined, but our normal invoice cycle starts in October/November for the following year.

How to apply?

To apply for membership, please fill out the form below. Once we’ve received your application we will ask you to provide a signed copy of the SSI Principles and a document summarising your financial turnover.

Once all documents for the membership application are received, we will proceed with our pre-membership due diligence procedure. Joining the SSI entails a commitment to supporting the SSI’s mission and adhering to the SSI Principles.

Manufacturer members specifically commit to having two sites assessed within 12 months of joining and adding more sites annually. After completing due diligence, the application will be reviewed and approved by the Board. Upon approval, the SSI Secretariat will onboard you, providing access to tools, meetings, and begin the first step of the assessment process.

SECTION 1 | Member general information

1. Name of applicant for SSI membership(Required)

Enter the name of the organisation or name of each entity in a group of legal entities. The name written here will be the name that appears on the SSI website.

2. Full name of the legal entity, if different from above(Required)

In the case of a group of entities that fall within the scope of the above applicant, but that are not all subsidiaries of the one entity, list all the relevant legal entities and their country of incorporation.

3. Country of incorporation(Required)

In In the case of a group of entities that fall within the scope of the above applicant, but that are not all subsidiaries of the one entity, list all the relevant legal entities and their country of incorporation under the question above instead, and state 'See above' in this box.

4. Organisation logo (high-res PNG)(Required)

Accepted file types: png, Max. file size: 3 MB.

Please upload a high resolution .PNG file of your organisation's logo.

SECTION 2 | Details of company representatives

1. Name of main company representative(Required)

2. Main company representative job title(Required)

3. Main company representative email address(Required)

4. Main company representative address(Required)

5. Main company representative telephone number(Required)

6. Main company representative mobile phone number

7. Name of additional contact to receive SSI correspondence (if applicable)

8. Additional contact job title

9. Additional contact email address

10. Additional contact address

11. Additional contact telephone number

12. Additional contact mobile phone number

13. If you have a list of additional contacts to receive SSI correspondence, please add names and contact details here:

14. Communications team contact email(Required)

The SSI will be in touch with this contact to provide them with the SSI members' communications guidelines.

15. Name of finance contact to receive SSI invoices(Required)

Primary contact will also receive copies of SSI invoices. If you wish the SSI to use a different company name and/or address for SSI invoices instead of the details provided above, please add the alternative details here.

16 Job title of finance contact(Required)

17. Address of finance contact(Required)

18. Telephone number of finance contact(Required)

19. Mobile phone number of finance contact

20. Email address of finance contact(Required)

Different company name and/or address for invoices

If you wish the SSI to use a different company name and/or address for SSI invoices instead of the details provided above, please add the alternative details here.

21. Different company name

22. Different address

23. Different telephone number

SECTION 3 | Member Company Information

1. Full address of applicant's head office, including country(Required)

2. VAT number

For all EU and VAT-registered companies.

3. Telephone number of head office, including country code(Required)

4. Applicant's website address(Required)

5. Corporate structure and ownership disclosure(Required)

To help us understand your organisation’s structure and ownership, please share details of parent companies, subsidiaries, joint ventures, or other affiliated entities, including those located abroad. This information helps us ensure alignment with our traceability and sustainability standards. You are welcome to attach supporting documents such as an organigram, legal notice, or other relevant materials in your response.

Add files to support question 5 here

Drop files here or Select files

Max. file size: 10 MB, Max. files: 10.

6. Conflicts of interest(Required)

Does your company or any of its subsidiaries, affiliates, or beneficial owners have any financial, ownership, or governance relationship with:

Any current SSI buyer members?

Any current SSI manufacturer members?

Any approved SSI assessment bodies or consultants?

Please provide details here(Required)

7. List all production and operational sites currently owned or operated by your organisation or its subsidiaries.(Required)

For each site, indicate the location (country and region), type of facility (e.g. polysilicon production, ingot/wafer, cell, module assembly, R&D, recycling, logistics, etc.), and whether it is fully owned or part of a joint venture. Please make sure to indicate if the sites are actively producing.

8. Does your company, or any of its subsidiaries, suppliers, or affiliates, operate in or source from the below listed countries/regions?(Required)

Afghanistan, Belarus, Bosnia & Herzegovina, Cambodia, Burundi, Central African Republic, China, Cuba, Democratic People's Republic of Korea (DPRK – North Korea), Democratic Republic of the Congo, Donetsk (Ukraine), Eritrea, Gaza, Guatemala, Guinea, Guinea-Bissau, Haiti, Iran, Iraq, Lebanon, Libya, Mali, Moldova, Montenegro, Myanmar, Nicaragua, Niger, Russia, Serbia, Somalia, South Sudan, Sudan, Syria, Türkiye, Ukraine Venezuela, Yemen, Zimbabwe

Yes

No

If yes, please specify the countries/regions and nature of operations or sourcing

SECTION 4 | Membership Type

1. Membership type(Required)

BuyerManufacturer

Select the membership type best suited for your organisation.

2. If you are a manufacturer, please select your type of production:(Required)

ModulesCellsWafersIngotsMGS - metallurgical grade siliconQuartz mining

3. Number of employees in applicant organisation(Required)

Please enter a number greater than or equal to 0.

4. Your estimated financial turnover for the previous year (please consider your group organisation)(Required)

Large (yearly turnover > €500M)

Medium (yearly turnover between €500M and €50M)

Small (yearly turnover < €50M)

5. Is your organisation a member of SolarPower Europe or Solar Energy UK?(Required)

Yes

No

6. Countries of operation(Required)

List all countries of operation for the applicant organisation.

7. Organisation description(Required)

Please describe your organisation, outlining how your organisation partakes in the solar value chain and your interest in joining the SSI. This description will be used in association with your organisation's logo on the SSI website. (Max 300 words; SSI may edit any text provided.)

8. Statement for press / newsletters(Required)

Please provide a statement from your organisation to describe why you have joined the SSI which can be used in press and newsletter correspondence by the SSI. Please include the name and title of the spokesperson that the statement should be attributed to.

9. How did you find out about the SSI?(Required)

Conference or industry event

Industry or consumer press

Social media

Online search

Word of mouth

Tick all relevant boxes.

Other (please provide details)

Section 3: Membership Commitment

Membership will be confirmed once the SSI has done a due diligence evaluation and the Member has signed the SSI Principles, which will be sent via email once this initial form has been reviewed and accepted.

Please also send your organisation's latest financial statements to [email protected]. Be sure to reference applicant company name in the subject.

Communications consent(Required)

I have the authority to and provide my consent to receiving communication from SSI on essential membership matters.

Signed for and on behalf of the applicant organisation by

Name of signatory

Job title

Organisation

Signature

By signing here you consent to provide your personal information to SSI for the purpose of receiving essential communication on SSI matters. Please see the SSI Privacy Policy (www.solarstewardshipinitiative.org/privacy-policy/) for more information. By signing here, you agree to adhere to the SSI principles and pay the SSI membership fee.

Date

The SSI is committed to ensuring the security and protection of the personal information that we process and to provide a compliant and consistent approach to data protection. If you have any questions related to our GDPR compliance please contact us.

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