Alternative Energy Extender Act

Alternative Energy Extender Act - Amends the Internal Revenue Code to extend through 2010: (1) the tax credit for electricity produced from certain renewable resources; (2) the tax credit for holders of clean renewable energy bonds and the national volume cap for such bonds; (3) the tax deduction for energy efficient commercial buildings; (4) the tax credit for new energy efficient homes; (5) the tax credit for residential energy efficient property; (6) the tax credits for investment in qualified fuel cells, microturbine power plants, and solar energy property; and (7) the income and excise tax credits for biodiesel and alternative fuels and for alternative fuel vehicle refueling property.

Increases the maximum tax credit amounts for the advanced coal and gasification project programs.

Extends through 2012 the taxpayer election to expense certain crude oil refinery property.

Amends the Harmonized Tariff Schedule of the United States to extend through 2010 the suspension of duties on mixtures of ethyl alcohol and ethyl tertiary-butyl ether.