Haw. Rev. Stat. § 14-23: Time for election, number to be chosen.

In each presidential election year there shall be elected at large, at the general election, by the voters of the State, as many electors and alternates of president and vice president of the United States as the State is then entitled to elect, in the manner provided under section 11-113. The electors and the alternates must be registered voters of the State. The election shall be conducted and the results thereof determined in conformity with the laws governing general elections except as otherwise provided.