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. 333-119256) and the related
Prospectus of CMS Energy Corporation dated February 1, 2005 for the registration
of 5,000,000 shares of 4.50% Cumulative Convertible Preferred Stock, 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