How Bali’s electricity system works: capacity, peak demand and reserves
Bali’s power system has about 1,500 megawatts of generating capacity but less than 30% reserve, while demand grows by 7-8%. Here is how the island’s electricity buffer works.
By Mukmin John
Editor: Mursyid Sonsang
· 2 min read
Bali’s electricity system has about 1,500 megawatts of total generating capacity, about 1,400 megawatts of available capacity and a highest peak load of about 1,200 megawatts, according to Bali’s Energy and Mineral Resources Agency, 2025. Demand is growing by 7-8%, while reserve capacity is below 30%, making reliability a central infrastructure issue.
How much electricity can Bali generate?
The Bali provincial Energy and Mineral Resources Agency reported in July 2025 that the island’s existing system had total generating capacity of about 1,500 megawatts and available capacity of about 1,400 megawatts. The distinction matters: installed capacity is the system’s total rated potential, while available capacity reflects what can operate under current conditions.
How much electricity does Bali use at peak?
Bali’s highest peak load reached about 1,200 megawatts, according to the agency’s 2025 electricity-road-map report. Peak load measures the highest demand placed on the system, rather than total electricity consumed over a day or year.
Why is Bali’s electricity reserve considered tight?
The same 2025 report said Bali’s reserve was less than 30% and described the system as vulnerable if a generating unit required maintenance or faced an operational problem. A reserve is the gap between available supply and peak demand; it provides a buffer against outages and sudden constraints.
What is planned for Bali’s electricity system?
The agency said Indonesia’s Electricity Supply Business Plan for 2025-2034 includes additional gas-fired generation and allocations for large-scale, rooftop, communal and floating solar-power projects. The plan is intended to support electricity availability while increasing the role of cleaner energy.
Why does this matter beyond power supply?
Bali’s provincial government said in March 2026 that its energy policy was pushing faster adoption of clean energy through power-generation projects and rooftop solar. Separately, the Ministry of Public Works said in July 2026 that Bali’s infrastructure planning must integrate tourism, environmental management and regional resilience, including energy and basic services.
Sources
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