A businessman in the Cook Islands is planning a small hydro electricity operation to satisfy some of Rarotonga's night time power needs.
The pilot scheme will involve pumping water to a vast holding tank and then letting it run through turbines at night.
Lawyer Tim Arnold, who has been working with businessman Chris Vaile on the scheme, says it is a product of the Cook Islands drive for renewable energy.
He told Don Wiseman the Cooks cannot rely on a swift flowing mountain river for hydro power.
Listen