Tonga is to get its first solar power plant as part of a New Zealand Government boost to clean energy options in the Pacific.
Most Pacific island countries are still close to 100 percent dependent on fossil fuels for power generation.
Ahead of the Pacific Island Forum meeting, which officially opens on Wednesday, Foreign Minister Murray McCully unveiled a package to support energy alternatives and make power cheaper.
It will invest $7.9 million to fund the construction of a 1.3-megawatt solar plant on the Tongan mainland, Tongatapu.
The plant will help provide cheaper energy to Tongan households, which pay up to seven times more for retail electricity than New Zealanders.
Petrol and diesel also cost up to three times more.
"This public-private partnership is an exciting approach to delivering aid that also represents a possible model for similar infrastructure projects in the Pacific," Mr McCully told a Pacific investment summit in Auckland on Tuesday.
Tongan Prime Minister Lord Tuivakano said the investment would support his country's 10-year plan to reduce reliance on imported fuel.
It aimed to halve use of fossil fuels by the end of 2012.
The plant, to be built next year, will offset 470,000 litres of diesel a year once fully operational.
NZN