SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

~~Pursuant~~PURSUANT toTO ~~Section~~SECTION 13 orOR 15(d) ofOF ~~the~~THE ~~Securities~~SECURITIES ~~Exchange~~EXCHANGE ~~Act~~ACT ofOF 1934

Date of Report (date of earliest event reported) ~~February~~August 1114, 2003

RELIABLE POWER SYSTEMS, INC., ~~Formerly known as Dencor Energy Cost Controls, Inc.~~ (Exact name of registrant as specified in its charter)

                            COLORADO                                           0-9255                                                    84-0658020
                               (State or other jurisdiction                      (Commission File No.)                          (IRS Employer Identification No.)
     of incorporation or organization)

10 South Riverside Plaza, Suite 2220
Chicago, Illinois 60606
(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code: (720) 733-8970

FORM 8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d)
of the Securities Act of 1934

Item 1. Changes in in Control of Registrant. Not Applicable

Item 2. Acquisition or Disposition of Assets. Not Applicable

Item 23. Bankruptcy ~~Acquisition~~ or ~~Disposition~~ ofReceivership. ~~Assets~~Not Applicable.

Item 4. Changes in Registrant's Certifying Accountant. Not Applicable

Item 35. ~~Bankruptcy or~~Other ~~Receivership~~Events. Not Applicable.

~~Not~~Item ~~Applicable~~6. Resignation of Registrant's Directors. Effective June 30, 2003, Mr. Gary C. Hoffmann, our President, resigned from all offices. Our Board of Directors has appointed Mr. John Stensland as our President and a Director. A copy of Mr. Hoffmann's resignation is attached.

~~Item~~Mr. 4Stensland previously served as President of Merrill Corporation's Chicago Operating Company. Merrill ~~Changes~~is a document and information company with offices in 20 major US markets and ~~Registrant’s~~worldwide ~~Certifying~~international ~~Accountant~~affiliations.

~~Not~~While at ~~Applicable~~Merrill Corporation, Mr. Stensland served as Board President for the Community Emergency Shelter Organization, a non-profit organization that provided technical assistance, training and consulting services to homeless shelter operations in the Chicago area. Upon retiring from Merrill, Mr. Stensland joined CESO as Associate Director and Development Director to help the organization’s fund raising and management efforts.

~~Item~~Prior to 5his tenure at Merrill, Mr. ~~Other~~Stensland served as Sales and Marketing Manager ~~Events~~for the Air Quality Control Operation of FMC Corporation, a business unit that designed and built air pollution control systems for the electric utility and general industrial markets.

OnItem ~~January 22, 2003, Mr~~7. ~~James~~Financial ~~Currie~~Statements, ~~our~~Pro ~~President,~~Forma ~~resigned from all offices, effective immediately. Our Board of Directors has appointed Mr. Gary Hoffmann as our President. He is also our Chief~~ Financial ~~Officer~~Information and ~~will continue to serve in this dual capacity~~Exhibits. ~~Mr.~~Not ~~Gary~~Applicable ~~Hoffmann is the brother of our Chairman, Mr. David Hoffmann.~~

Item 68. ~~Resignation of~~Change ~~Registrant’s~~in ~~Directors~~Fiscal Year. Not Applicable

Item 9. Regulation FD Disclosure. Not Applicable

~~Item~~2 ~~7. Financial Statements, Pro Forma Financial Information and Exhibits.~~

Not Applicable

Item 8. Change in Fiscal Year.

Not Applicable

Item 9. Regulation FD Disclosure.

Not Applicable

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Reliable Power Systems, Inc.

Date ~~February~~ ~~11,~~August ~~2003~~14, ~~By:~~2003 /s/ Gary Hoffmann Gary Hoffmann President

By: /s/ John Stensland
    John Stensland
    President

RELIABLE POWER SYSTEMS, INC.

June 30, 2003

Board of Directors
Reliable Power Systems, Inc.
10 South Riverside Plaza
Suite 2220
Chicago, Illinois 60606

Gentlemen;

Effective today, I hereby resign from all offices, including as President, of Reliable Power Systems, Inc.

Sincerely,

/s/ Gary C. Hoffmann

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