Evergreen Solar to Present at the Piper Jaffray Opportunities in Alternative Energy Symposium

February 15, 2007

Company to Webcast Presentation on February 21

MARLBORO, Mass.—Evergreen Solar, Inc. (Nasdaq: ESLR), a manufacturer of solar power products with its proprietary, low-cost String Ribbon™ wafer technology, today announced that the Company will be presenting at the Piper Jaffray Opportunities in Alternative Energy Symposium in New York City on Wednesday, February 21, 2007 at 4:30 p.m. (ET).

At the symposium, Chief Financial Officer Michael El-Hillow will discuss Evergreen Solar’s business strategy and review the Company’s recent accomplishments and financial results. The presentation will be broadcast live over the Internet. Those interested in listening to the live webcast should log on to the “Investors” section of Evergreen Solar’s website, www.evergreensolar.com, prior to the event.

About Evergreen Solar, Inc.

Evergreen Solar, Inc. develops, manufactures and markets solar power products using proprietary, low-cost manufacturing technologies. The Company’s patented crystalline silicon technology, known as String Ribbon, uses significantly less silicon than conventional approaches. Evergreen’s products provide reliable and environmentally clean electric power for residential and commercial applications globally. For more information about the Company, please visit www.evergreensolar.com.

Evergreen Solar® is a registered trademark and String Ribbon™ is a trademark of Evergreen Solar, Inc.