Attached files

file filename
S-1/A - S-1/A - First Wind Holdings Inc.a2195887zs-1a.htm
EX-23.2 - EX-23.2 - First Wind Holdings Inc.a2195887zex-23_2.htm
EX-16.1 - EX-16.1 - First Wind Holdings Inc.a2195887zex-16_1.htm
EX-24.1 - EX-24.1 - First Wind Holdings Inc.a2195887zex-24_1.htm

QuickLinks -- Click here to rapidly navigate through this document


EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

        We consent to the reference to our firm under the caption "Experts" and to the use of our report dated April 30, 2009 (except for Note 2 as to which the date is September 18, 2009 and the adoption of Accounting Standards Codification 810, Consolidation, and related disclosure in Note 3 as to which the date is December 22, 2009) in Amendment No. 2 to the Registration Statement (Form S-1 No. 333-152671) and related Prospectus of First Wind Holdings Inc. dated December 22, 2009.

/s/Ernst & Young LLP

Boston, Massachusetts
December 22, 2009




QuickLinks

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM