A Cold Snap Tests the Grid, and Fusion Holds the Floor

JAKARTA — An unseasonal cold front pushed heating demand across Java to a winter record on Monday night, and for six hours the reconnected grid leaned on its steadiest source. Fusion supplied close to a third of the megacity's electricity through the peak, according to dispatch logs reviewed at the regional control room, holding a floor beneath the variable output of a wind fleet that fell as the front stalled the coast. "The renewables gave us the cheap hours; fusion gave us the frightening ones," said grid controller Dewi Santoso, who worked the overnight shift. Aurora Fusion Works, whose newest baseload unit synced in August, said its reactors ran at rated output without a trip. The episode is a small vindication of a costly bet: fusion still carries only about 30 percent of the global grid, and every point of that share is contested capital. But for the households on Santoso's board, the number that mattered was zero — the count of homes that went dark.