A big advantage with Longroad was that Infratil could start with a small investment and both the Infratil and Longroad teams were able to build confidence as the investment level grew.
Europe "ticks a lot of boxes," particularly tailwind forecasts which, if anything, look even stronger than in the US.
In late 2018, Markit forecast Europe needs 140 gigawatts of renewables to be built by 2021 compared with 75 gigawatts in the US.
Government support mechanisms, including feed-in tariff and similar mechanisms, are rolling off and that's creating complexity and challenging under-capitalised developers, Boyes said.
He says that's an opportunity for Infratil, which has backed the Longroad team with capital, in conjunction with the New Zealand Superannuation Fund, and so has a track record to point to.
Earlier, chief financial officer Phillippa Harford, told investors Infratil, with gearing at 34 per cent at March 31, has $458m in funds available to invest.
That doesn't include the expected A$162m ($170.8m) proceeds from selling Infratil's interest in Canberra student accommodation which is expected to flow in this month.
Infratil has invested $154m since it began investing in Longroad and has received $152m of that capital back and its share of Longroad was worth $128m at March 31.
Boyes says Infratil still has a lot of opportunity available in the US through Longroad, despite President Donald Trump's refusal to acknowledge climate change. The opposition to reducing carbon emissions at the federal level has resulted in the individual states becoming more encouraging of the development of renewables.
However, there's no question the European Union is providing more regulatory support.
"We think the Longroad structure will suit us," Boyes said, although he says Infratil probably won't get as lucky with timing as it did in the US so development in Europe is likely to be a lot slower.
Meanwhile, the company says it expects operating earnings could fall in the year ending March 2020 not including incentive fees.
It is now forecasting earnings before interest, tax, depreciation, amortisation and financial instruments of between $510-540 million for the year beginning this month.
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• Infratil forecasts likely fall in operating earnings this year