Exhibit (23) (g)

            Consent of Independent Registered Public Accounting Firm

We consent to the reference to our firm under the caption "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 29 October 2004 with
respect to the financial statements of SCP Investments (No.1) Pty Ltd for the
year ended June 30, 2004 included in CMS Energy Corporation's Annual Report
(Form 10-K/A) for the year ended December 31, 2003 filed with the Securities and
Exchange Commission.

                                                /s/ Ernst & Young

Perth, Australia
27 January 2005