Australia has installed more than 500,000 home batteries under a federal subsidy program launched in July 2025, Energy Minister Chris Bowen announced on Friday. The program offers a 30 percent discount on residential battery systems connected to rooftop solar arrays.
Australia leads the world in rooftop solar adoption, with panels on more than one in three households. The surge of midday solar generation has forced wholesale power prices down and threatened grid stability, while much of the energy goes unused.
The battery subsidy aims to store that surplus solar power for use during evening peak demand. Households drawing on stored energy reduce the need for utilities to start additional power plants at those hours.
Officials attribute a 47 percent drop in wholesale electricity prices over the past 12 months primarily to the battery program. Bowen said Australia is one of very few countries reducing wholesale prices during a global energy crisis.
Bloomberg reports that Australia is on track to more than double its home battery capacity this year. Bowen also noted that Australia now has more home batteries than the United States, despite a population roughly one-twelfth the size.
Complementary measures include offering free electricity in the early afternoon in Queensland, New South Wales, and South Australia to encourage appliance use and electric vehicle charging when solar output is highest.
The combined approach seeks to align household consumption with renewable generation, lowering costs for all ratepayers while improving grid reliability.
Researchers continue to monitor long-term effects on grid operations, battery degradation, and the program's fiscal sustainability.
In Australia, a Home Battery Boom Has Helped Cut Wholesale Power Prices in Half
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