What is the International Solar Energy Society, ISES?

Founded in 1954, the International Solar Energy Society (ISES) is a non-profit, UN-accredited membership organization with a longstanding commitment to advancing renewable energy, particularly solar energy. Over the decades, ISES has built a reputation as a trusted global advisor, bringing together experts, innovators, and stakeholders to shape the future of renewable energy.

As a leading advocate for solar and renewable energy solutions, ISES plays a pivotal role in driving the transition to a sustainable, 100% renewable energy world. Our core mission is not only to promote the use of solar energy but also to ensure it is used efficiently and wisely to meet the growing global energy demands while protecting our planet.

ISES serves as a global platform for collaboration, where members from around the world—spanning research, industry, policy, and education—work together to overcome challenges, share innovative solutions, and push for the rapid deployment of renewable energy technologies. Through initiatives, conferences, publications, and advocacy efforts, ISES facilitates the exchange of knowledge and promotes cutting-edge research and development.

At the heart of ISES’s vision is a world powered by renewable energy for all, creating a future where clean, sustainable energy is accessible and affordable for everyone, everywhere. As a member-driven organization, ISES continues to build networks, forge partnerships, and support policies that will accelerate the adoption of renewable energy solutions on a global scale.

By joining ISES, you become part of a vibrant, forward-thinking community dedicated to advancing the global renewable energy transition. Together, we are working toward a future that is powered by the sun and shaped by the sustainable choices we make today.

We invite you to join as a member!

To purchase an individual membership:

You may purchase an ISES Membership directly here: join.ises.org

OR

You are subscribed to our mailing list, and thus you already have an account in our membership system. In this case, please:

• Set your password: https://join.ises.org/user/password
• Log in to your account:https://join.ises.org/user/
• Once logged in, click on "Buy Membership".

Please update your contact details and preferences by clicking on Edit in the menu. This is important to determine the correct membership category.

OR

You are not subscribed and would like to join through our mailing list! Then, please, enter your e-mail address and name in the subscription form in the footer of this website.

Members Area

Once your account is set up, you will have access to the Members Area of the ISES website.

Corporate Members

If you are interested in becoming an ISES Corporate Member, contact us at members [at] ises.org and we will guide you through the application process.

You may also purchase an ISES Corporate Membership directly here: https://join.ises.org/content/new-corporate-member

Further questions?
Please feel free to get in touch with our membership team at the ISES headquarters in Freiburg, Germany. Contact us via email; members [at] ises.org or phone: +49 761 45906 52. We are happy to provide you with further information and to answer your questions.

Already an ISES Member? We may have two differing e-mail addresses in our system for you. Please contact us at members [at] ises.org to resolve this issue.