The Cook Islands government hopes to increase the amount of renewable energy powering Rarotonga from 15 percent to 50 percent soon.
The Green Climate Fund, a United Nations fund to help developing countries adapt to climate change, has granted the Cook Islands $US12 million to expand the main island's energy grid.
The announcement is the first of a series of projects, which will be led by the Asia Development Bank, to expand renewable energy around the Pacific.
The Chief of Staff of the prime minister's office, Elizabeth Wright-Koteka, told Jamie Tahana the grid can't handle the current uptake of renewable energy, and the expansion will help solve that.