Coal graft probe implicates itself in the blackouts hitting a coal-rich island

A formal investigation, not a rumor

On Monday, July 6, 2026, Indonesia's National Police upgraded a preliminary inquiry into coal procurement for state-owned power plants into a formal criminal investigation. The Criminal Investigation Department, Bareskrim, led by Comr. Gen. Syahardiantono, is working alongside the Corruption Eradication Corps, Kortas Tipidkor, under Insp. Gen. Totok Suharyanto. Enforcement Director Brig. Gen. Roberthus Yohanes De Deo Tresna Eka Trimana confirmed the case now covers alleged corruption and money laundering in coal supply contracts with coal-fired power plants spanning 2018 to 2026. Two firms, identified so far only by the initials UBP and BRA, are suspected of manipulating the quantity and quality of coal delivered against contract terms. Investigators have questioned 16 witnesses. No suspects have been named.

The timing matters. The investigation is not an isolated compliance story. Police and several members of the House of Representatives now argue that irregular coal deliveries to power plants are a direct cause of the rolling blackouts that have hit Sumatra, Java, Greater Jakarta, and Kalimantan over recent months. The Supreme Audit Agency, BPK, has been asked to conduct an investigative audit to establish the real financial losses, since the current Rp 5 trillion, or roughly US$277.5 million, figure that police have cited is explicitly preliminary.

The irony of an island that mines coal and still loses power

Kalimantan produces most of Indonesia's coal, yet four of its five provinces, East, South, Central, and West Kalimantan, have experienced rolling blackouts in recent weeks. In Banjarbaru, South Kalimantan, a beverage vendor named Lilis told The Jakarta Post that power has cut out almost daily for about four hours over nearly two weeks, forcing her to close her stall each time. "When the electricity goes out, we have to close. We only reopen once the power comes back," she said. Pasha, who runs a frozen food business in the same city, said the bigger risk is not the outage itself but the voltage swings when power returns, which can damage compressor units in refrigeration equipment and raise operating costs even when the freezers keep running.

"Even coal-producing regions that supply PLN, such as those in Kalimantan, have become victims of rolling blackouts."

That line, from House Commission XII member Sigit Karyawan Yunianto, captures the contradiction driving public frustration: a province that exports coal to fuel plants elsewhere in the country cannot reliably keep its own lights on. In East Kalimantan specifically, disruptions were traced to technical faults at the Handil coal-fired plant and the Tanjung Batu gas-fired plant, together accounting for roughly 250 megawatts of lost capacity, with repairs expected to take about a month. In South Kalimantan, a large private gas-and-steam plant, PLTGU, suffered a separate technical failure expected to constrain capacity through September 2026, prompting PLN to schedule daily rotating outages to preserve grid stability.

The numbers behind the shortfall

State utility PLN needs an estimated 154 million tons of coal in 2026 to run its fleet, but has only secured contracts for about 134 million tons, leaving a shortfall of 18 to 20 million tons. Coal for PLN plants must meet a calorific value of roughly 4,500 to 5,200 kilocalories per kilogram, and the mismatch between what mines are contracted to deliver and what they can profitably produce at that quality is central to the graft allegations.

The underlying incentive problem is a price gap. Indonesia's domestic market obligation, DMO, caps the price PLN pays for higher-calorific coal at US$70 per ton. The international benchmark price in June 2026 stood at US$121.83 per ton, a gap of nearly US$52 per ton. Mining costs for many producers, with stripping ratios of 8 to 12 at mature concessions, already exceed the DMO ceiling, and a compensation scheme that once reimbursed producers for the difference between market and DMO prices was quietly dropped at the end of 2025. Analysts, including Ronny P Sasmita of the Indonesia Strategic and Economic Action Institution, have argued this combination, a mandated 25 percent DMO obligation regardless of coal quality, delayed approval of annual mining work plans, and no compensation mechanism, creates exactly the kind of moral hazard that invites the fraud police are now investigating. Gita Mahyarani, executive director of the Indonesian Coal Mining Association, APBI, said the association could not yet comment on the substance of the case, noting that PLN sources coal from hundreds of suppliers and that two firms alone are unlikely to explain blackouts of this scale.

To stabilize supply, the government has approved an emergency shipment of 1.8 million tons of coal in July 2026 and a special allocation of 3 million tons per month from August through December, restoring an estimated 5 gigawatts of capacity to the system.

A dispute over whether the problem is even solved

PLN president director Darmawan Prasodjo told a House hearing on July 2, 2026, that restored supplies of higher-calorific coal had stabilized the Java grid. "With the support of the Ministry of Energy and Mineral Resources, the electricity system in Java has no longer experienced rolling blackouts since 21 June 2026," he said. Commission XII members pushed back immediately, citing constituents still experiencing outages in Sumatra and Kalimantan. Commission member Syarief Fasha urged PLN to weigh national energy sovereignty in coal-producing regions rather than concentrating reliability efforts on Java. Darmawan acknowledged continuing problems outside the Java-Bali grid, pointing to a technical fault at an independent power producer in West Kalimantan and disruptions to electricity imports from Sarawak, Malaysia.

The disagreement is not academic. If PLN's public position, that the core supply problem is resolved, does not match what regions like Kalimantan are experiencing on the ground, then either the graft-linked disruptions are more localized and persistent than the utility is acknowledging, or new causes are emerging as fast as old ones are fixed.

Sirkularium's view

This case sits precisely at the intersection of energy security and governance that Sirkularium's public-sector clients are contending with across the archipelago. Three implications stand out for government and public institutions.

First, the DMO price cap needs redesign, not removal. A fixed ceiling that ignores production cost and coal quality will keep generating the incentive to under-deliver or misrepresent shipments, regardless of how many individual corruption cases get prosecuted. A dynamic pricing mechanism, or a restored and better-audited compensation scheme, would address the root cause rather than the symptom.

Second, regional equity in grid reliability deserves explicit policy attention. A coal-producing island experiencing blackouts is a governance failure independent of the corruption case, and it will keep generating political pressure, and probably keep generating fraud opportunities, until PLN's investment and maintenance priorities account for producing regions and not only the Java-Bali load center.

Third, institutions overseeing procurement in state-linked utilities should treat this case as a template for tightening contract verification, not a one-off scandal. The pending BPK audit will be an important test of whether Indonesia's oversight bodies can attach a credible number to the losses and translate that into enforceable reforms to coal procurement, work plan approval timelines, and quality verification at the point of delivery. Public institutions should watch the audit's findings and the eventual naming, or non-naming, of suspects as the clearest signal of how seriously this moment will be treated.