Evergreen Solar Announces Investor Day Webcast

February 8, 2007

MARLBORO, Mass.—Evergreen Solar, Inc. (Nasdaq: ESLR), a manufacturer of solar power products with its proprietary, low-cost String Ribbon(TM) wafer technology, today announced that it will be webcasting its Investor Day on Thursday, February 22, 2007, from 9:30 a.m. to 12:45 p.m. (ET).

All interested parties are invited to listen as Evergreen Solar Chairman and CEO Richard M. Feldt, Chief Financial Officer Michael El-Hillow and other members of the executive team provide a strategic overview of the Company’s business through a series of presentations, followed by a question and answer session. The live webcast can be accessed on the Company’s website at www.evergreensolar.com. For those unable to listen to the live presentations, an archived webcast will be available on the Company’s website.

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 Solar’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.