Australia's battery subsidies spark rooftop solar resurgence

SINGAPORE/SYDNEY — Australia's expanded home battery subsidy program is fueling a surge in rooftop solar adoption, helping households lower electricity costs while accelerating the country's shift toward cleaner energy.

For 64-year-old transport worker Paul Tyler, who lives about 160 kilometers (100 miles) north of Sydney, installing solar panels had long been unaffordable. That changed after the federal government's battery subsidy reduced his upfront costs by about 30%, allowing him to install 18 solar panels and a 28-kilowatt-hour battery for A$9,000 (US$6,248).

Tyler said the subsidy made the installation possible and cut his monthly electricity bill to around A$50 from A$275.

He is among hundreds of thousands of Australians investing in home battery systems, driving demand for larger rooftop solar installations that allow households to store more electricity and reduce reliance on the power grid.

Analysts said Australia's rooftop solar boom demonstrates how countries facing delays in expanding transmission infrastructure can continue cutting greenhouse gas emissions through distributed energy systems.

Australians spent an estimated A$8.69 billion on home batteries during the first five months of 2026, according to a Reuters calculation based on Solar Choice pricing data and installation figures from energy consultancy SunWiz.

The increase followed the government's decision in December to expand its Cheaper Home Batteries Program, boosting funding to A$7.2 billion over four years.

SunWiz data showed that households installed 7.7 gigawatt-hours of battery storage between January and May, surpassing the combined total recorded over the previous six years. The surge has benefited battery manufacturers, including Tesla, BYD, Sungrow, and Fox ESS.

Australia already has the world's highest rate of rooftop solar adoption, with about one in three homes equipped with solar panels. Industry experts attribute the growth in part to streamlined regulations that have significantly lowered installation costs.

SunWiz forecasts rooftop solar installations will reach a record 4 gigawatts in 2026, exceeding the previous peak set in 2021 and accounting for more than two-thirds of the country's large-scale renewable energy additions recorded last year.

The rapid expansion of rooftop solar has also contributed to a decline in Australia's coal-fired electricity generation, which has fallen for 10 consecutive months through June, according to National Electricity Market data.

Energy analysts said home batteries are increasingly supplying electricity during evening peak demand, reducing pressure on the grid and limiting the need for additional transmission infrastructure. Australia's energy market operator estimates that aggregated home battery systems could eliminate the need for about A$5 billion in grid-scale battery investments.

Higher volumes of electricity exported from household batteries are also helping reduce wholesale power prices, benefiting consumers even if they do not own battery systems.

Despite the growth, access remains uneven. Energy Consumers Australia estimates that nearly half of Australian households cannot install solar panels or batteries because they rent, live in apartments, or earn less than A$50,000 annually.

For those who can install them, however, battery storage is giving households greater control over electricity costs by allowing them to decide when to use stored energy or sell excess power back to the grid, rather than relying solely on fixed retail electricity rates. -Reporting by Sudarshan Varadhan in Singapore and Christine Chen in Sydney; Editing by Jamie Freed/Reuters