Exhibit 23.1

INDEPENDENT AUDITORS' CONSENT

We consent to the incorporation by reference in Registration Statement Nos.
33-54398, 333-07515, 333-43547, 333-56697, 333-32118 and 333-62714 on Form S-8
and No. 333-96369 on Form S-3 of Metretek Technologies, Inc. (f.k.a. Marcum
Natural Gas Services, Inc.) of our report dated March 25, 2004 (which report
expresses an unqualified opinion and includes an explanatory paragraph as to the
adoption in 2002 of Statement of Financial Accounting Standard No. 142,
"Goodwill and other Intangible Assets" as well as the change in accounting for
contracts from the completed-contract method to the percentage-of-completion
method) appearing in this Annual Report on Form 10-K of Metretek Technologies,
Inc. for the year ended December 31, 2003.

/s/ Deloitte & Touche LLP
DELOITTE & TOUCHE LLP

Denver, Colorado
March 25, 2004