The campaign to encourage people to save electricity will end this week after a rise in hydro lake levels.
The media campaign was launched nearly six weeks ago by the country's main electricity suppliers.
Campaign convenor Patrick Strange says a combination of prudent savings by the public, collaboration by industry and rainfall in the right places has improved the outlook for hydro storage.
Dr Strange says southern hydro lake levels have continued to rise, and controlled storage is now at 59% of average, compared with 46% six weeks ago.
Dr Strange says a national savings average of 4.6% has been recorded.
He says New Zealanders have saved tens of millions of dollars on their power bills in the course of the campaign.