Govt Moves to Prevent Winter Power Shortages and Price Surges

The Winter Energy Reliability Obligation forms part of the Government’s wider Securing Affordable Energy plan, which is focused on improving reliability while keeping electricity affordable.

New Zealand households and businesses could see greater protection from winter electricity shortages and sudden price increases under a major Government plan designed to strengthen the country's energy security.

Energy Minister Simeon Brown has announced a new Winter Energy Reliability Obligation, a measure that will require major electricity companies and large power users to secure enough backup energy before winter periods when hydro generation is expected to come under pressure. The move follows the sharp electricity price increases experienced in 2024, when low hydro lake levels and limited generation capacity placed significant strain on the power system. The Government says those conditions exposed weaknesses in the market and highlighted the need for stronger preparation before dry years occur.

Under the proposed obligation, large electricity buyers would need to arrange a backup supply well in advance of forecast dry winters. Generators would also be expected to ensure they have firm fuel supplies available if hydro storage drops to critical levels before winter arrives. Officials believe these requirements will make the electricity system more resilient during periods when rainfall is low and hydro generation is restricted.

Tougher penalties for companies that fail to prepare

The Government is also seeking to increase accountability across the electricity sector by introducing much tougher penalties for companies that fail to meet their obligations. Current penalties for serious breaches are capped at $2 million. Proposed changes would allow penalties of up to $10 million, three times the financial benefit gained from a breach, or 10 per cent of a company's turnover, depending on which amount is highest.

Brown said households should not have to shoulder higher electricity costs because large energy companies fail to plan for foreseeable risks. He argued that responsibility for managing dry-year risks belongs with major generators and electricity users rather than taxpayers or consumers. The Government expects the stronger rules to encourage greater investment in backup generation, storage solutions, demand response programmes and other technologies that can help maintain supply during periods of high demand.

Broader energy reforms to strengthen supply security

The Winter Energy Reliability Obligation forms part of the Government's wider Securing Affordable Energy plan, which is focused on improving reliability while keeping electricity affordable. The government is considering additional sources of backup energy, including a possible liquefied natural gas (LNG) import facility. Other options being explored include new generation projects, expanded storage capacity and demand management measures that reduce pressure on the grid during peak periods. The Electricity Industry Act will be amended to give the Electricity Authority a more direct role in overseeing dry-year risk management across the energy system. The Authority will also be required to provide annual reports to the Minister outlining current and emerging security-of-supply risks.

The Government intends to update its Government Policy Statement on electricity as well. The revised statement will direct the Electricity Authority to place greater emphasis on managing dry-year risks while balancing reliability, affordability and overall security of supply. Brown said the reforms are focused on creating a more dependable energy system that can provide New Zealanders with reliable electricity without exposing them to extreme price volatility during difficult winters.