That has set off a high-risk gamble to find alternatives to nuclear, which supplies 12 per cent of the island’s electricity. The sprint reflects a drive across the region towards cleaner energy sources such as sunlight, wind and natural gas.

The solution: wind turbines are planned for the blustery Taiwan Strait, solar panels are popping up on coastal salt flats, and terminals are being planned to import more liquefied natural gas.

But new sources could take years to develop, making power rationing and blackouts a possibility as the gap narrows between demand and generating capacity.

“There are going to be concerns over the next few years about reserve margins and power supply reliability,” said Zhouwei Diao, an IHS Markit analyst in Beijing.

The plan has several parts. First, all nuclear and most oil-fuelled generators will be shut. Together, they supplied 16 per cent of Taiwan’s electricity in 2016.

The island will still have about the same amount of coal capacity by 2025 as now, but its share of total power generation will drop to 30 per cent from about half as sources of alternative energy expand.

Natural gas will see the biggest usage gain, accounting for half of supply by 2025, while renewables like wind and solar will more than triple to 20 per cent.

As electricity demand grows over the next seven years, the government says it will boost generating capacity while limiting carbon emissions and ridding itself of a political headache.

Taiwan’s nuclear industry was already unpopular after it built a controversial waste storage site on Orchid Island, home to an indigenous tribe.

But sentiment turned even more negative after the disaster in Japan, which occurred after a giant earthquake and tsunami. The disaster prompted countries including Germany and South Korea to ditch their nuclear programmes.

Taiwan Power operates three nuclear plants and was building the fourth in Lungmen when the Fukushima meltdown happened. In 2014, the government stopped construction that was nearly complete, with uranium-fuel rods in place.

In 2016, the Democratic People’s Party won an election on an anti-nuclear platform. Last month, workers removed the unused fuel rods and sold them to a buyer in the US.

Betting that it can replace all that nuclear power in less than a decade and expand output to meet rising demand is “very ambitious”, said Robert Liew, an energy analyst with Wood Mackenzie in Singapore.

“The Taiwanese government is trying to prove the future is arriving faster than people thought. It’s been so far, so good, but let’s see what happens in three to four years. That’s the tricky part.”

The government’s decision puts the electricity grid in a precarious spot. Four years ago, Taiwan had enough capacity to produce 15 per cent more power than peak demand, or more than enough to handle unexpected plant outages, according to Bloomberg NEF.

That cushion fell to 10 per cent in 2015 and as low as 1.7 per cent in August 2017, when several nuclear reactors were temporarily offline for maintenance. The margin has remained above 6 per cent for most of this summer.

TaiPower warned of the country’s first power rationing since 2002. Last year, a mistake at a gas-fired power plant triggered a blackout that hit more than 6 million households and disrupted some semiconductor production.

Industry groups, including the Chinese National Association of Industry and Commerce, called for the government to reverse course on its nuclear phase-out and to open Lungmen to avoid future curtailments.

The government has stuck to its plan. Part of the optimism comes from the plunging cost of building wind and solar projects around the world. There is also expanding supplies of cheap liquefied natural gas available from the Middle East, Australia and the US.

But it will take years for Taiwan to build the additional gas plants and LNG import terminals it needs, and any delays could limit its ability to expand electricity production, said Jonathan Luan, a Bloomberg NEF analyst in Beijing.

And large-scale solar and offshore wind projects are facing their own hurdles.

Vena Energy operates Taiwan’s largest solar-power installation, which can produce 5 megawatts from panels on four hectares near a rural town called Kouhu.

Flat, sun-exposed land is hard to come by, in part because about two-thirds of the island is mountainous. For its Kouhu project, Vena negotiated with more than 20 different landowners and had to lay out panels at odd angles to avoid farmland and, in one case, a tomb.

Most of the panels are mounted above former salt flats.

Singapore-based Vena has six more major solar projects lined up in Taiwan, though some have been slowed by delays in getting local permits. Work could speed up as officials become more familiar with utility-scale solar projects, which are new to the island, said Gavin Tan, the company’s Taiwan head.

“We’re extremely bullish, and we’re doing what we can to get more megawatts done,” Tan said.

Offshore wind is also new to Taiwan, but shows promise. The land masses of Taiwan and mainland China corral air flowing above the East China Sea and funnel it through the 110-mile wide Taiwan Strait, adding intensity to the gusts as it passes through to the South China Sea.

“This is one of the best offshore-wind resources in the world,” Bloomberg NEF’s Luan said.

In April, the government sought to encourage investment in the industry by offering to pay as much as US$199 per megawatt-hour for 3.8 gigawatts of supply from offshore wind turbines.

Companies jumped at the offer, submitting more bids than were requested. In June, the government auctioned off another 1.7 gigawatts, awarding bids at less than half the previous rate.

Developing an offshore industry to expand supplies of cheap power might also kick-start a domestic industry with thousands of jobs making turbines, which could then compete for new projects across Asia, including Vietnam and Japan.

At the port of Taichung, the wind power industry is beginning to take shape.

Heaps of dirt and stones rise above the ground, cranes lower new pilings into the water and backhoes scoop slop from the seabed, all in an effort to strengthen wharves and deepen channels to build giant offshore wind turbines.

Taichung has also set aside land and is building roads, plumbing and power lines to lure manufacturers of everything from turbine towers and blades to gears and rotors.

It just finished building a training centre known as the Academy of Maritime Development and is hosting a group of local college students this summer to promote career choices in the offshore wind industry.

“Young people have to leave Taichung to find work,” said Kuo-Ying Wang, the head of the training centre. “This will give them the chance to build a good career without having to leave home.”