Batam blackout disrupts water supply and communications as power recovery continues

A widespread power outage in Batam, Indonesia's industrial city in the Riau Islands province, disrupted businesses, clean water supplies and mobile communications after an electrical fault on Monday, 12 October, with the electricity provider investigating whether a wild animal entering a substation triggered the incident.

The blackout began at 6.37 am local time on Monday and affected multiple areas of the city. Businesses reported interrupted operations and delayed work, while disruptions to mobile networks made communication difficult. The outage also affected clean water distribution by Batam's drinking water supply system, known locally as SPAM Batam.

Although the electricity network underwent extensive restoration, PLN Batam reported on Wednesday that available supply stood at 550 megawatts (MW), against demand of 590 MW, leaving a 40 MW shortfall that prompted rotational power cuts.

Water shortages and communications failures disrupt daily life

The outage affected essential services and commercial activities across Batam, with some areas experiencing prolonged interruptions.

Businesses in Batam Center struggled to operate as machinery became unusable and mobile phone networks were disrupted. The interruptions prevented workers from completing their tasks and hindered businesses dependent on electricity and reliable communications.

Steven, a business operator in Batam Center, described the disruption in an interview broadcast by Metro TV's Selamat Pagi Indonesia programme on Wednesday.

"There's nothing I can do for work. The network is gone, even phone calls don't work, and in the end all the work is in disarray," he said.

Steven said the disruption had begun early on Monday morning, around 6.30 am.

The blackout affected traffic and fuel stations, where long queues of motor vehicles extended onto roads in several areas.

The disruption extended beyond commercial activity. Water supplies from SPAM Batam were reported to have stopped flowing, while mobile network failures made it difficult for residents to communicate.

Some companies reportedly sent employees home because their operations could not continue under the disrupted conditions. Businesses dependent on machinery, electricity and communications faced delays and potential financial losses as normal activities were interrupted.

PLN investigates suspected substation intrusion

PT PLN Batam, the electricity utility serving the city, identified the possible entry of a wild animal into the Sungai Harapan substation as an initial indication of what caused the widespread outage.

Company secretary Rudi Antono said the suspected intrusion had disrupted electrical installations at the substation, affecting electricity supplies across several areas.

"Based on initial indications, the disruption is suspected to have been triggered by a wild animal entering the Sungai Harapan substation, causing a disturbance to electrical installations and affecting electricity supplies in several areas," Rudi said in a statement reported by Indonesian news agency ANTARA on Tuesday.

Rudi reiterated that the suspected cause had not yet been established conclusively.

"The exact cause of the disruption is still under further investigation by the technical team and the relevant authorities," he said, according to Detik.

In an interview broadcast by Metro TV on Wednesday, Rudi similarly described the suspected animal intrusion as the initial indication, adding that further investigation was needed before the utility could provide a comprehensive account of the incident.

The investigation remained ongoing as the company worked to maintain the stability of the electricity network and monitor supplies following the outage.

Electricity restoration progresses in stages

PLN Batam said its technical and operational teams had worked to restore the affected electricity system progressively after the disruption began on Monday morning.

The restoration process had made significant progress from Monday evening. By 4 am on Tuesday, electricity had been restored to 98% of affected customers, while 99% of the interrupted electrical load had been brought back online.

All affected substations and transmission networks in Batam had also returned to operation, the utility said.

The restoration involved inspecting and normalising power generation units, synchronising generating units, and restoring transmission and distribution networks. PLN Batam said the process was carried out with attention to safety, system stability and reliability.

The company subsequently reported that electricity supplies to all affected customers in Batam had been restored.

However, the restoration of the network did not eliminate the supply shortfall reported on Wednesday.

Rudi said that the system's available supply was 550 MW, compared with demand of 590 MW. The resulting 40 MW deficit meant PLN Batam was implementing rotational power cuts to manage the gap between supply and demand.

The utility said technical and operational personnel remained on standby to monitor the system and maintain the reliability of electricity supplies.

PLN Batam outlines compensation for affected customers

PLN Batam said customers could receive compensation if the disruption exceeded the applicable service quality standards, known in Indonesia as Tingkat Mutu Pelayanan (TMP), or the agreed Service Level Agreement (SLA).

Under the arrangements outlined by the utility, regular customers would receive compensation equivalent to 10% of their monthly fixed electricity charge, in accordance with Riau Islands Governor Regulation No. 22 of 2017.

Customers subscribed to enhanced reliability services would be eligible for compensation ranging from 15% to 25% of their electricity usage charges, known as Rupiah Pemakaian Tenaga Listrik (RPTL), depending on the terms of their service agreements.

The compensation would be applied automatically through customers' subsequent electricity bills, without requiring them to submit claims, PLN Batam said.

The utility apologised for the inconvenience caused by the outage and thanked residents for their patience and support during the restoration process.

As the investigation into the suspected substation incident continued, the utility said it would maintain operational monitoring to ensure the reliability of the electricity network.