Haw. Rev. Stat. § 182-16: Levy and assessment of general excise tax.

Notwithstanding any provision to the contrary, the levy and assessment of the general excise tax on the gross proceeds from any manner of sale of (1) geothermal resources or (2) electrical energy produced by the geothermal resources producer from such geothermal resources, shall be made only as a tax on the business of a producer, at the rate assessed producers, under section 237-13(2)(A).