Exhibit (23) (c)

            Consent of Independent Registered Public Accounting Firm

We consent to the reference to our firm under the captions "Selected
Consolidated Financial Data" and "Experts" in Amendment No. 1 to the
Registration Statement on Form S-3 (No. 333-119255) and the related Prospectus
of CMS Energy Corporation dated February 1, 2005 for the registration of
$150,000,000 of 3.375% Convertible Senior Notes due 2023, Series B and to the
incorporation by reference therein of our report dated February 27, 2004, with
respect to the consolidated financial statements and schedule of CMS Energy
Corporation included in its Annual Report (Form 10-K/A) for the year ended
December 31, 2003, filed with the Securities and Exchange Commission.

                                    /s/ Ernst & Young LLP

Detroit, Michigan
January 27, 2005