However, it's clear that selling the half-stake in the Southern Hemisphere's largest wind farm ahead of the proposed partial privatisation means taxpayers will not be sharing most of the one-off gains with future private shareholders, if the sale of 49 per cent of the state-owned power producer proceeds as planned in the third quarter of this year.
The purchaser of the 50 per cent stake is Malaysia's largest independent electricity producer, Malakoff Corp, which also holds interests in power stations in Algeria, Bahrain and Saudi Arabia, and is constructing a US$600 million wind farm in Pakistan, according to a report in the Wall Street Journal on the Macarthur sale.
That report says Macquarie Capital advised Meridian on the sale, while ANZ advised Malakoff.
The involvement of the Australian federal government's A$10 billion Clean Energy fund attracted controversy when word of the impending deal leaked in recent weeks.
The CEF was criticised for making its first major investment as part of the sale of an existing Australian asset by a foreign company.
Malakoff, a subsidiary of MMC, is controlled by Malaysian tycoon Syed Mokhtar Al-Bukhary, one of the country's richest men, who also owns majority stakes in auto maker Proton and gas supplier Gas Malaysia.
Meridian entered into the joint venture with ASX-listed AGL Energy to build the 420 megawatt Macarthur development in 2010 under previous chief executive Tim Lusk. Its sale was triggered by the way Meridian's contracts were structured to deliver a "bond-like" return for at least the next two decades, but at rates of return higher than are available at today's historically low interest rates.
With falling interest rates globally, a key factor in the sale was "investor appetite for fixed rate products," said Chambers.
The transaction also reflects a drive by current chief executive Mark Binns to tidy up Meridian's balance sheet ahead of the partial privatisation of the most valuable of the government's electricity producers.
"While the Macarthur investment was intended to be held over the full project term, the low interest rate environment and the opportunity to invest in further wind farms in Australia provided a compelling reason to look at a sale and the reinvestment of funds in future renewable generation options in Australia," Binns said.
The sale "has delivered a return that reflects our early stage involvement in development and our investment in construction plus capitalised interest, holding costs and other expenses."
The SOE retains a presence in Australia with its Mt Mercer wind farm development in Western Victoria, and is looking at other opportunities across the Tasman, including rolling out its low-cost online retail brand Powershop.
In 2005 Meridian reaped a NZ$652.5 million profit from the A$1.46 billion sale of its Southern Hydro to AGL, then known as Australian Gas Light. The government then pulled out an $800 million special dividend from the sale.