To amend the Internal Revenue Code of 1986 to modify the investment tax credit for combined heat and power system property.

Amends the Internal Revenue Code to revise the energy tax credit for investment in combined heat and power system property to: (1) increase the capacity limitations for such property; and (2) expand the definition of such property to include property which produces electrical or mechanical energy from recovered waste energy using back-pressure turbines, rankine, sterling, kalina, or other heat engines.