A traditional market is seen during a major power blackout in Jakarta, Indonesia, August 4, 2019. Indonesia's state power company PLN estimated on Sunday it would take several hours to restore power to Jakarta after a major blackout, blaming technical issues for cutting power to tens of millions of people in the capital and surrounding provinces. REUTERS/Fransiska Nangoy

Commuter train passengers rest as they wait to travel to Jakarta outside a station, closed due to a major power blackout, in Banten, Indonesia, August 4, 2019. The power outage spread across areas that are home to more than 100 million people and appeared to have affected most areas of the capital, prompting the use of generators in some offices, malls and apartments. REUTERS/Arimacs Wilander

Workers stand outside a Mass Rapid Transit (MRT) station closed due to a major power blackout in Jakarta, Indonesia, August 4, 2019. "Hopefully for the Jakarta system, if everything goes to plan and the generating system is reliable, smooth supply should return in approximately three hours," Sripeni Intan Cahyani, acting chief executive of PT Perusahaan Listrik Negara (PLN), told a news conference. REUTERS/Gayatri Suroyo

A commuter train passenger talks with a security officer at a station closed due to a major power blackout in Banten, Indonesia, August 4, 2019. Cahyani said electricity customers in the provinces of West Java and Banten should get power back within four to five hours. REUTERS/Arimacs Wilander

A man talks with a security officer at a Commuterline station as it is closed due to a major power blackout in Jakarta, Indonesia, August 4, 2019. She blamed faulty transmission circuits on Ungaran to Pemalang power line in Central Java for causing voltage drops that hit power networks in Jakarta as well as West Java and Banten provinces. REUTERS/Gayatri Suroyo

General view of the capital city of Jakarta during a major power blackout, Indonesia, August 4, 2019. Indonesia's state power company PLN estimated on Sunday it would take several hours to restore power to Jakarta after a major blackout, blaming technical issues for cutting power to tens of millions of people in the capital and surrounding provinces. REUTERS/Fransiska Nangoy