Power Generation

The Generation Department is responsible for the operation, construction, and maintenance of the generation plant on all four islands grids, emergency generators, and for monitoring and control of the system including protection and compliance reporting.
Other duties involve integration of new generation onto the system, and support in the development of new generation projects.
As of February 2016, TPL installed a diesel capacity of 17.276 MW in all four islands. Tongatapu capacity and its peak demand is about 9.5 MW.
Diesel Generation with a capacity of 13.9 MW
1.4 MW from the Maama Mai Solar Facility plus 500 KW of Lithium Capacitor with a capacity of 11 KWH
1.0 MW and 500 KW Lithium Capacitor with a Capacity of 11 KWH which includes TPL’s micro solar, wind project and third party solar 
1.892 MW plus 420 KW of solar fuel save controller including 185 KWH battery storage safe discharge generating at 0.415 KV
0.692 MW plus the soon to be commissioned 550 KW photovoltaic solar and 300 KWH battery storage safe discharge plus 11 KW wind turbine generating at 0.415 KV
0.792 MW plus soon to be commissioned 200 KW photovoltaic solar and fuel save controller generating at 0.415 KV