This communication does not constitute an offer to buy or a solicitation of an offer to sell any securities. No tender offer for the shares of EnerNOC, Inc. (“EnerNOC”) has commenced at this time. In connection with the proposed transaction, Enel Green Power North America, Inc. (“EGPNA”) intends to file tender offer documents with the U.S. Securities and Exchange Commission (“SEC”). Any definitive tender offer documents will be mailed to shareholders of EnerNOC. INVESTORS AND SECURITY HOLDERS OF ENERNOC ARE URGED TO READ THESE AND OTHER DOCUMENTS FILED WITH THE SEC CAREFULLY IN THEIR ENTIRETY WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED TRANSACTION. Investors and security holders will be able to obtain free copies of these documents (if and when available) and other documents filed with the SEC by EGPNA through the Web site maintained by the SEC at http://www.sec.gov or through EGPNA’s website at http://www.enelgreenpower.com or may also be obtained from EGPNA upon written request to Enel Green Power North America, 100 Brickstone Square, Ste 300, Andover, MA 01810, e-mail: egpna.communication@enel.com.