The Energy Supply Base (ESB) is a private commercial port located in Mabini, Batangas, which offers pier services, warehousing facilities, cargo handling, equipment rental, manpower services, bunkering and water services. It is owned and managed by PNOC EC.
In 1977, the Philippine Energy Supply Base (PESB) was created by Presidential Decree of President Ferdinand E. Marcos as per Letter of Instruction No. 563 to support the exploration activities in the Philippines. By 1994, PNOC EC absorbed the operation of the Energy Supply Base from Petron Corporation.
Although the ESB was initially set up to cater the logistical needs of PNOC EC and the domestic energy industry, it has since opened its services to other commercial clients with the granting by the Philippine Ports Authority (PPA) a Permit to Operate as private commercial port under Certificate of Registration No. 291 in October 8, 1996. The Permit to Operate is co-terminus with the 25-year foreshore lease agreement of ESB with the Department of Environment and Natural Resources (DENR) effective May 3, 1996.
ESB is also a Custom Bonded Warehouse which helps companies to expedite the unloading and loading of cargoes at ESB ports.