Chatham Islanders will pay almost a third more for electricity from the start of June, with the price rising from around one dollar a kilowatt hour to $1.32, more than three times the mainland average of about 40 cents.
The increase, set by the Chatham Islands Enterprise Trust which runs the local lines and generation network, follows another year of stubbornly high diesel costs. The remote islands sit around 800 kilometres east of Christchurch and have no connection to the national grid, so they still rely heavily on diesel generation when the wind is not blowing.
Chatham Islands Enterprise Trust chief executive Bob Penter told Radio New Zealand that the islands are roughly three times more dependent on diesel than mainland New Zealand, which makes any movement in world fuel prices feed quickly through to power bills. He pointed to the Point Durham wind farm, commissioned in November last year, as the only thing holding the increase to 32 percent rather than something larger. “It is making quite a significant contribution to holding pricing back,” Penter said, estimating that without the wind farm prices would have lifted by another twenty cents or so a unit.
For families on the islands, that still leaves a kilowatt of electricity costing more than three times what households in Auckland or Wellington pay. Hotel Chatham owner Toni Croon said she could not see how some residents would cope. “I don’t know how they’ll survive,” she told the Otago Daily Times, describing households already stretched by freight, food and fuel costs that are also well above mainland levels.
The hotel itself has 55 rooms and uses substantial amounts of electricity for heating, hot water, kitchens and refrigeration. Croon said her monthly power bill had dropped from around twenty thousand dollars to thirteen thousand since the wind farm started feeding into the grid, a relief of close to a fifth, but the new tariff step will claw some of that back.
The islands’ power problem is structurally different from anything on the mainland. The Chathams have a population of around 600 people, with hospitality, fishing and farming the main industries. Building large generation capacity is uneconomic for such a small load, and the cost of importing diesel by sea is exposed to both shipping rates and the price of crude oil. New Zealand wholesale electricity, by contrast, is largely supplied by hydro, geothermal and wind generators that do not have to buy ongoing fuel, and is hedged through long-term contracts that smooth shorter-term price swings.
The Point Durham wind farm was the result of years of work to lower that fuel dependency. Penter said the islands were not yet at 100 percent renewable generation, and topping up with diesel during calm spells continues to be a significant cost. The trust has signalled that if global diesel prices ease, retail tariffs would follow them back down, but the recent jump in international fuel benchmarks linked to the Middle East conflict has had the opposite effect.
The wider business impact is felt across the small island economy. Fishing operators, the dominant export earner, run cool stores, ice plants and processing equipment that all draw heavily on electricity. Farmers rely on power for milking sheds, water pumping and shearing plants. Local cafes, the marae, the school, the hospital and the freight depot all face the same per-unit tariff. Each lift in the rate flows directly into the cost of every business operating on the islands, and ultimately into prices charged on the mainland for Chatham fish and crayfish.
The new tariff also lands while the rest of the country is debating its own electricity affordability. The Electricity Authority has been examining wholesale prices, the Government is pushing more generation consents through faster, and several large industrial users have warned that energy costs are at the centre of their decisions on whether to keep New Zealand sites open. The Chathams illustrate, in extreme form, what happens when a small grid sits at the end of a long diesel supply chain with no transmission cable to share in mainland averages.
For now, residents and business owners on the islands are looking ahead to whether further renewables can be added to the network. Penter has previously talked about expanded wind capacity and battery storage, which would let the system run on renewables for longer stretches and reduce the diesel buffer needed during still weather. Any further build is constrained by the size of the local demand base and by who pays for the upfront capital. The trust has signalled it is exploring options including additional turbines, solar panels and storage, but no firm timeline has been put on those projects.
What that means in the short term is that from 1 June, the cost of running a freezer, heating a home or pumping water on Pitt or Chatham Island will be more than three times what a mainland household pays. Whether the Government, the Electricity Authority or a private investor decides that gap is acceptable, or worth narrowing through some kind of cross-subsidy, is a debate that has so far gone largely unanswered in Wellington.
Have you visited the Chathams, or do you have family or business links to the islands? Tell us in the comments below how energy costs are shaping life and business there, and what you think should happen next.
This article was written by AI, briefed to report the facts, hopefully without some of the bias people bring to the job 🙂
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