Southeast Asia’s fragile grids threaten billions in clean energy investment

When heavy storms triggered a fault on a major power line in Indonesia’s Sumatra in late May, blackouts plunged homes and businesses across the island into darkness, leaving millions to cope without power in the humid heat for up to a day.

Failed traffic lights caused chaos on the streets of Medan, one of the country’s biggest cities, and restaurants and shops had to shutter or throw out food after fridges stopped working. Four people were reported to have died from carbon monoxide poisoning from generators.

A power outage caused by damage to cables on a high-voltage transmission line, the first of two to strike Sumatra in a fortnight, highlighted the huge challenge facing Indonesia and much of neighbouring Southeast Asia – the maintenance and upgrading of inadequate grid capacity that industry analysts say is proving an obstacle for billions of dollars in planned clean power inve


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