ISES Membership & Online Shop Membership Information

Welcome to the Join ISES website of the International Solar Energy Society (ISES). Here you will find some important information about ISES membership and purchasing ISES products.

The ISES website is managed by ISES Headquarters located at Wiesentalstr. 50, 79115 Freiburg, Germany registered at the District Council of Freiburg, registration No. VR 2739.


By using this website, you agree to these terms and conditions, please read them carefully. In addition, when you use any current or future ISES service, you also will be subject to the guidelines and conditions applicable to such service or business.

ISES may change these terms at any time, in which case the amended terms will be posted on this website and will apply from the date posted. If you continue to use the website you will be bound by the latest terms.

The format and content of this website may be changed or updated regularly. Please refresh your browser each time you visit the website to ensure that you access the most up to date version.


Your Account
When registering on this website, you create your own user account, which is your ISES member account. The e-mail address you provide is your user account name, and you are responsible for selecting your own password. It is your responsibility to maintain the confidentiality of your account and password and for restricting access to your computer, and you agree to accept responsibility for all activities that occur under your account or password. ISES reserves the right to refuse service, terminate accounts, remove or edit content, or cancel orders at their sole discretion. If you have trouble logging onto your account, please contact the ISES membership team. Click here for instructions on how to renew your membership, purchase additional services and update your account.


ISES Memberships & Additional Services
ISES offers Individual and Corporate memberships as well as additional services only available to members. All memberships and additional services are non-transferable and non-refundable. Please see the Individual Membership benefits and fee structure here and the Corporate Membership benefits and fee structure here.

ISES members will receive regular renewal notices before and after their membership expires. Memberships are considered inactive if they are not renewed and paid within 3 months of expiration. Members can log onto their accounts using their user name and password to check their membership status and renew their membership.

Lapsed memberships and additional services can be renewed retroactively up to 6 months after the membership has expired. Additional services cannot be ordered without a membership or purchased for a period longer than an active membership. Click here for instructions on how to renew your membership, purchase additional services and update your account.

Memberships and additional services start on the 1st of the month following when the order was placed (for example the membership was ordered on 15 July, the start date of the memberships will be 01 August). If you wish your order to start on the 01 of the month you placed your order, please contact Memberships & additional services are for one year unless otherwise selected. ISES offers 10% discounts on additional services for Silver (5-year) Memberships and Gold (Lifetime) Memberships. These discounts are automatically applied when additional services are ordered with Silver and Gold Memberships. 


The prices displayed for ISES memberships and additional services on our website are valid. Special discounts are available as ISES' discretion and are available in the form of discount codes provided by ISES, which can be used when purchasing ISES membership and services where applicable.

All discount codes must be applied before submitting an order. Discounts will not be applied retroactively once an order has been submitted.

Lower-income country discounts are only applicable on Individual Memberships (does not include Additional Services or Corporate Memberships) and are applied according to country of residence entered in the online application form. Lower income countries are defined as countries with a GNI per capita below USD 8,350 (in 2012) as according to the World Bank and are reviewed and approved by the ISES Executive Committee on a regular basis based on the latest World Bank data. Please see the list with higher and lower income countries.

Student prices are only given with the registration process, after the requested student ID is uploaded. These memberships will be activated once the student ID is confirmed by ISES.

Product Descriptions
ISES strives to be as accurate as possible. However, ISES does not guarantee that product descriptions or other content of this site is accurate, complete, reliable, current, or error-free.


We at ISES know and respect that how information about you is used and shared is important to you.

ISES is committed to ensuring the privacy of our members’ personal information. All contact data is protected. Personal information supplied to the website is exclusively used by ISES for the purposes specified by ISES. No information supplied is sold or passed onto any organisation outside ISES. We may share information with affiliates including ISES Sections or to members via our member directory for networking and membership purposes. All members can opt out of having their information published in the Member’s Directory. ISES does not collect any personal information about users, except that which is knowingly and specifically supplied by the user.

We use the information you provide in your membership application form for such purposes as processing your membership services and benefits, and communicating with you, e.g. responding to your inquiries.


Electronic Communications
When you visit the ISES website or send e-mails to us, you are communicating with us electronically. You consent to receive communications from us electronically via e-mail. You agree that all agreements, notices, invoices, receipts and other communications that we provide to you electronically satisfy any legal requirement that such communications be in writing.


Methods of Payment
ISES offers various payment options via secure Internet Payment Gateway from TeleCash. The following payment options are available:

  • Credit Cards (Visa, Master, American Express)
  • Giropay (only for customers with German bank account)
  • Direct Debit (only for customers with German bank account)
  • Maestro (for Customers with Maestro Card pre-approved for online payments)
  • Wire Transfer (bank transfer)

ISES does not save or store any information entered into the Internet Payment Gateway, only the information about which payment method was used and payment confirmation will be recorded for each order. All payment methods except wire transfer are automatically confirmed. ISES does not accept cheques.

Payments with wire transfer must be made to ISES bank account within 14 days of placing the order. Payments must be free of bank charges to ISES.Please include your invoice number and name on the bank transfer. Your invoice, which includes the ISES bank details, will be sent to you by email. Your membership and services will be activated once ISES has confirmed full payment has arrived in our bank account. The ISES account information for wire transfers is as follows:

Account Holder: International Solar Energy Society e.V.

Bank Name: Volksbank Freiburg

IBAN: DE85 6809 0000 0012 5050 00



Order Processing
After you have submitted your order, ISES will receive notification of your order and payment method. After full payment has been received/confirmed your order will be fulfilled. You can view all orders in your accounts under “Orders”.

Site Policies and Modification
ISES reserves the right to make changes to our site, policies, and these Terms and Conditions at any time.

ISES is not responsible for the content of any external links, not related to ISES, or provided on the ISES websites.


All content included on this site, such as the ISES logo and button icons, is the property of ISES. The compilation of all content on this site is the exclusive property of ISES.

Governing Law
These terms and conditions shall be governed by German Law under the Freiburg District Court (Amtsgericht Freiburg).

Legal Notice
The International Solar Energy Society e. V. is registered at the District Council of Freiburg, registration No. VR 2739.

The representatives of the non-profit organisation are:
President: Dr. David S. Renné
Vice President: Prof. Sigrid Jannsen
Treasurer: Mr. Torben Esbensen

VAT Identification No. DE 177 197 424 (international use)
Taxation No. 06470/41456 (for use in Germany only)

Contact persons for the ISES e. V. International Headquarters are:
Executive Secretary: Jennifer McIntosh

International Solar Energy Society
Villa Tannheim    
Wiesentalstr. 50
79115 Freiburg
E-Mail: –