Tonga’s energy mix is dominated by imported fossil fuels, which account for approximately 85–90% of total electricity generation as of early 2024. While the country has made strides in integrating renewable sources—primarily solar and wind—they currently contribute roughly 14–17% to the electricity mix.

Tonga is exploring green hydrogen as a key component in its transition toward a low-carbon, climate-resilient energy system, aiming to move away from fossil fuels. Feasibility studies indicate that hydrogen, produced via renewable-powered electrolysis, can provide viable long-term energy storage, improve grid stability, and help decarbonize the Pacific island nation.