08/04/2025
I've had many visitors ask about how Fiji source our electricity power supply to the country. Well, Fiji's electricity supply relies on a mix of renewable and non-renewable sources, with hydropower being the primary source, supplemented by diesel and heavy fuel oil, and the government-owned Energy Fiji Limited (EFL) responsible for generation, transmission, and distribution.
The Monasavu Hydro Wailoa Power Station, commissioned in 1983, works by diverting water from the Monasavu Dam through tunnels to the power station, where four 20 MW Pelton turbines generate electricity, utilizing a hydraulic head of about 625 meters.
Here's a more detailed explanation:
Water Source:
The Monasavu Dam, completed in 1983, stores water from the Nanuku River, forming a large man-made lake.
Water Diversion:
Water from the reservoir is diverted through nearly 5.4 kilometers of tunnels to the Wailoa Hydro power station located to the east of the Wailoa River.
Turbines:
The power station contains four 20 MW Pelton turbine generators.
Electricity Generation:
The Pelton turbines convert the kinetic energy of the flowing water into electricity.
Hydraulic Head:
The drop in elevation between the reservoir and the power station provides a hydraulic head of about 625 meters, which is the driving force for the turbines.
Commissioning:
The Monasavu-Wailoa Hydroelectric Project was authorized in 1977, construction began in May 1978, and the dam and power station were commissioned in 1983.
Capacity:
The power station has an installed capacity of 80 MW.
Role in Fiji's Energy Needs:
The Wailoa Power Station plays a vital role in supplying Fiji's energy needs, providing approximately 70MW of the 180MW installed capacity.
In the meantime Fiji utilizes biomass, including sugarcane bagasse and wood residues, for electricity generation, with a goal of achieving 100% renewable electricity by 2030, and currently over 50% of electricity comes from renewable sources like hydro, biomass, wind, and solar.
*Info Source Fiji Times, EFL.