More than in probably any other nation, it’s the rooftops of Australian homes that are driving a transition away from coal.

Astronomical growth in household solar will see a jump in renewables to 69% of generation in the main electricity network by 2030 from 23% in 2019, according to new government projections. That forecast is 14 percentage points higher than predicted a year ago. 

“Higher penetration of renewable generation, driven by rooftop solar, particularly to the middle of the decade, and stronger wind deployment at the end of the decade, has delivered the majority of the revision,” the country’s Department of Industry, Science, Energy and Resources said in a report. 

Low costs of installations, and abundant sunshine, have helped make Australia a world leader in rooftop panels.

Households Could Soon Become Australia’s Biggest Power Source

By 2030, coal will fall to just 11% of total installed generation capacity, down from 35% in 2019. Small-scale solar will jump to 30% from 13%, and wind to 17% from 10%. As a result, electricity emissions in 2030 will be 21% less than predicted last year, the department said. 

Australia’s total emissions are now forecast at 439 million tons in 2030, down from a forecast of 478 million last year and 624 million tons in 2005. Prime Minister Scott Morrison’s government has faced questions over its methodology, and the inclusion of reductions driven by the land-use sector.

Morrison on Tuesday committed to a net-zero target by 2050, but has been criticized for not setting a more ambitious goal for 2030.