The Tongan government says it will scrutinise the ongoing hikes on electricity tariffs with help of the International Renewable Energency Agency.
The Prime Minister, Lord Tu'ivakano says the government's multi-million dollar assistance to reduce electricity tariffs appears to have had no impact on bills.
Lord Tu'ivakano says Tonga's Energy Road Map has provided nearly 54 million US dollars to Tonga Power to help with its operations.
Radio Tonga reports the Prime Minister telling Parliament that despite several solar projects in place, there has still been a hike in electricity costs.
He says the International Renewable Energy Agency has been asked to investigate Tonga Power's financial management and administration.