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The company planned to simplify the refinery side of its business but was also evaluating a proposal that would go further and see it importing pre-refined fuel.
Wallace said people would expect fuel to be cheaper if more of it was
imported, but they were wrong.
He said some workers have been asked to take leave during the shutdown in July and August.
"The workers at the refinery want information on the doom and gloom to stop. They are a bit upset and want people to know that they are a major contributor of fuel, not just to Northland, but around the country," he said.
Wallace said the refinery should ramp up plans on its $37m solar hydrogen farm, Maranga Ra, with an initial capacity of 27MW and its construction, installation and operation would generate close to 300 jobs through local companies.
"By establishing entirely new industries, Maranga Ra will bring real benefit to a region that
faces some of the country's most acute social challenges, and create transition jobs for our talented workforce, 25 per cent of whom are Māori."
But Refining NZ spokeswoman Ellie Martel said a long-term shift to a terminal on fuel pricing would not impact on fuel prices as currently about 30 per cent of New Zealand's fuel was imported.
The company wasn't prepared to comment on possible job losses, saying the next update on its strategic review would be provided at the end of September.
On Maranga Ra, Martel said alternative fuel production was several years away from being economically viable and was not a solution to the current challenges of refining in New Zealand.
"There is no demand for hydrogen as a transport fuel today and biofuels produced elsewhere in the world are supplied into markets providing incentives for these products.
"The potential for the refinery to convert to producing alternative fuels will be part of the discussion as we look further ahead. We will be exploring what options might exist to re-purpose, reuse or redeploy the refinery facilities and capabilities we have."
Energy Minister Megan Woods said the government has been engaging with the refinery throughout its review and have been kept up to date on issues such as fuel supply security, the regional economy and New Zealand's transition to low carbon fuels.
"We are assured that New Zealand's fuel supply will remain secure because we can source fuels from multiple refineries in multiple locations to minimise supply risks, should Refining NZ switch to a fuel import business model."