EXHIBIT 13.1

CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

      Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a)
and (b) of Section 1350, Chapter 63 of Title 18, United States Code), each of
the undersigned officers of E.ON AG (the "Company"), does hereby certify, to
such officer's knowledge, that:

      The Annual Report on Form 20-F for the fiscal year ended December 31, 2005
of the Company fully complies with the requirements of Section 13(a) or 15(d) of
the Securities Exchange Act of 1934 and the information contained in the Annual
Report on Form 20-F fairly presents, in all material respects, the financial
condition and results of operations of the Company.

Date: March 9, 2006

                                           /s/ Dr. Wulf H. Bernotat
                                       -----------------------------------------
                                       Name: Dr. Wulf H. Bernotat
                                       Title: Chief Executive Officer

Date: March 9, 2006

                                           /s/ Dr. Erhard Schipporeit
                                       -----------------------------------------
                                       Name: Dr. Erhard Schipporeit
                                       Title: Chief Financial Officer