Bali’s Peak Load Nears 1,300 MW as PLN Eyes More Solar Capacity

Denpasar — Bali’s power system is seeing both higher peaks and steadily rising energy use, with PLN Unit Induk Distribusi (UID) Bali reporting a maximum load close to 1,300 megawatts and electricity sales of about 5,487 gigawatt-hours through August 2026, driven largely by tourism and business activity.

According to PLN UID Bali General Manager Ajrun Karim, electricity consumption in Bali grew about 8.02% in the first half of 2026 compared with a year earlier, one of the fastest growth rates in Indonesia and above the province’s economic growth of around 5.6%. He linked the increase to rising economic, tourism and business activity and noted that demand is now relatively high throughout the day, not just in the evening peak.

PLN data cited by local media shows that Bali’s highest system load has now reached almost 1,300 MW, meaning the grid must be able to supply that level of power at the most demanding moments. This figure is separate from total electricity sales, which reached about 5,487 GWh up to August 2026, an 8.48% year-on-year increase largely supported by commercial and medium-voltage customers.

Peak demand and total sales are different measures

Peak load describes the maximum instantaneous power drawn from the system, typically measured in megawatts (MW). It represents the highest point of demand that the network must be able to serve at any given time, including generators, transmission lines and distribution infrastructure.

Electricity sales, usually expressed in gigawatt-hours (GWh), reflect the cumulative energy delivered over a period such as a month or a year. A system can record strong growth in total sales without setting a new record peak, or hit a higher peak even when overall sales grow more moderately.

In Bali’s case, the near‑1,300 MW figure is a measure of the system’s ability to cover the most demanding period, while the 5,487 GWh sales figure indicates how much energy customers used over the first eight months of 2026. PLN UID Bali has also reported sales of around 4,111.51 GWh up to June 2026, meaning demand remained strong into the second half of the year.

Local reports do not specify the exact date and time when Bali’s peak load approached 1,300 MW, nor do they detail the current reserve margin or total available generation capacity on the island. Those indicators would show how much headroom remains above peak demand and how resilient the system is to outages or sudden spikes in consumption.

Business customers drive sales growth

PLN UID Bali and several Indonesian outlets report that business and medium-voltage customers have played a significant role in pushing up electricity sales in 2026. PLN records around 884 medium-voltage customers with combined connected capacity of roughly 822.33 megavolt‑amperes and consumption exceeding 1,131 GWh, including hotels, shopping centres, hospitals, industry, transport and logistics companies.

Separate PLN figures show that business consumers accounted for about 1,898.27 GWh of electricity use up to June 2026, increasing by 8.80% from the previous year, underscoring the role of commercial activity in Bali’s power demand.

These numbers highlight why both peak load and total sales matter for planning. Sustained growth in sales can require more energy over time, while a rising peak necessitates infrastructure capable of serving concentrated demand even if that period is relatively short.

What PLN says it is preparing

PLN UID Bali has stated that it is accelerating additional generation capacity and reinforcing system reliability to keep pace with Bali’s rising electricity needs. Company representatives have pointed to solar power as a key technology, noting that photovoltaic projects can be developed as ground-mounted plants, floating installations on reservoirs or dams, and rooftop systems.

PLN has linked this push to Indonesia’s Electricity Supply Business Plan (RUPTL) for 2025–2034 and national targets for large-scale solar deployment, with plans to add about 2.74 GW of generation capacity, extend transmission networks and increase substation capacity serving Bali over the coming years.

Beyond PLN’s statements, analysts estimate that Bali has substantial technical potential for renewable energy. A clean power roadmap developed with the Institute for Essential Services Reform (IESR) suggests the island could host more than 20 GW of renewable capacity, dominated by around 21 GW of solar plus additional wind and geothermal resources. Other studies cite solar potential in the order of 10,000 MW, supported by wind, biomass and small hydropower options.

These figures describe potential resources, not installed capacity or projects that have reached construction. Available reports do not yet detail the specific size, location or commissioning schedule of individual solar plants for Bali, nor do they confirm particular battery storage schemes or inter-island transmission upgrades dedicated to the island.

What is clear from PLN and independent assessments is that electricity demand in Bali is rising noticeably, led by tourism, investment and commercial activity, and that both peak load and total energy use are important indicators for planning the island’s future power system.

Sources

• Detikcom - Konsumsi Listrik Bali Tumbuh 8,02%, PLN Tambah Pasokan Perkuat Ketahanan Energi
• Nusabali - Bisnis Bali Kerek Konsumsi Listrik
• Literasi Post - PLN Bersama Pelanggan Gerakkan Ekonomi Bali
• IQPlus/BCA Sekuritas - Penjualan Listrik PLN Bali Tumbuh 8,48 Persen Akibat Kenaikan Konsumsi
• RRI Denpasar - Penjualan Listrik PLN UID Bali Tumbuh 7,85 Persen Lampaui Target Semester I 2026
• Listrik Indonesia - Menilik Potensi Sumber Energi Terbarukan Bali
• IESR - Peluncuran Peta Jalan Ketenagalistrikan Bali 100% Energi Terbarukan 2045 (presentation PDF)
• Tanahair.net - Bali luncurkan peta jalan listrik bersih, mantapkan langkah menuju net zero 2045
• Mongabay Indonesia - Memantau Instalasi Listrik Surya di Kantor Pemerintah