When the luau bonfires go out, Hawaiian Electric Industries (HEI) keeps the islands lit up. HEI is the holding company for Hawaiian Electric Company (HECO) and some non-utility businesses. HECO (along with its utility subsidiaries Maui Electric and Hawaii Electric Light) serves about 457,800 customers (95% of the population) as the sole public electricity provider on the islands of Hawaii, Lanai, Maui, Molokai, and Oahu. The utilities account for the bulk of HEI's sales and have a generating capacity of about 2,224 MW. On the non-utility side it operates American Savings Bank, with 56 retail branches in the state (although company is selling this business).