Exhibit (a)(1)(vii) FORM OF E-MAIL CONFIRMATION OF RECEIPT OF NOTICE TO WITHDRAW FROM THE OFFER This e-mail confirms our receipt of your Notice to Withdraw from the Offer pursuant to our Offer to Exchange Certain Outstanding Options for New Options dated June 25, 2003 (the "Offer") and nullifying your previously submitted Election Form. Please note that the Notice to Withdraw from the Offer completely withdraws you from the Offer and cannot be used to make changes to your previously submitted Election Form. Please submit a new Election Form if you would like to change your election with respect to a particular option. In addition, you may change your mind and re-accept the Offer by completing and delivering a new Election Form per the procedures set forth in the Offer prior to 5:00 p.m., Pacific Time, on July 24, 2003. If you have questions regarding this confirmation, contact: Capstone Turbine Corporation Attention: Debbie Bernard 21211 Nordhoff Street Chatsworth, California 91311 Phone: (818) 734-5431 Fax: (818) 734-5381