The government is looking at how tweaking the home battery program could help balance the budget, but also risks slowing the shift to rooftop solar storage that has taken off since mid‑2025. In practice, that means modelling options such as ending the program ahead of schedule, trimming the 30% discount or tightening which battery sizes qualify, all while trying not to alienate the hundreds of thousands of households and small businesses that have rushed to sign up.
Right now, the Cheaper Home Batteries program is one of the standout pillars of the federal clean‑energy agenda. Launched in July 2025, it offers rebates that cover up to 30% of the cost of a home or small business battery, encouraging owners of rooftop solar systems to store surplus electricity during the day and use it in expensive evening peaks. The scheme proved so attractive that the original $2.3 billion budget estimate blew out by more than $11 billion, forcing officials to rework the design and top up funding to around $7.2 billion by the end of 2025.
Behind the scenes, departments across government are being asked to find savings ahead of the May budget, and the battery rebate is on the list simply because of its scale. The rules have already been adjusted once, with changes taking effect from May 1 that close a loophole allowing households to install oversized batteries at roughly the same net cost as smaller, more suitable systems, and that redesign came with an extra $5 billion in funding. On top of this, a separate review is under way into the electric vehicle tax incentive, which independent budget analysts suggest could carve as much as $23 billion out of government revenue over the next decade if left untouched.
Any further tightening of the battery rebate would land in a politically sensitive space. The scheme is especially popular among the more than 4 million homes with rooftop solar and recent data shows about 250,000 batteries have been installed under the program so far, enough storage, according to market research, to supply the typical daily power needs of nearly 500,000 households. Industry figures say that as many batteries were installed in the second half of 2025 as in the previous five years combined and, at current rates, the program appears on track to support roughly 450,000 new batteries in its first full year. That surge has become a rare bright spot for the government’s broader target of lifting renewables to 82% of the power mix by 2030.
The politics around the scheme are increasingly sharp. Opposition parties have stepped up attacks on Labor’s climate and energy policies since dropping their own net zero commitment, arguing that generous subsidies for batteries and electric vehicles mostly benefit higher‑income households that can afford the upfront cost while renters and lower‑income families remain stuck with conventional bills. Critics frame the rebate as a form of middle‑class assistance at a time of widespread cost‑of‑living strain and question whether public money should underwrite technology that many households still cannot realistically access.
Still, the government appears wary of dramatically cutting back a program that looks like a cornerstone of its emissions and grid‑stability strategy. Home batteries smooth out demand by soaking up rooftop solar at midday and feeding it back when the grid is under pressure, which in turn could reduce the need for more expensive generation and network upgrades over time. Any major pull‑back may slow that decentralised storage build‑out and complicate the path to the 2030 renewables target, but leaving the scheme untouched could also make it harder to deliver the savings that budget planners say are needed. For now, keeping the current settings seems to be the most likely outcome, yet the fact that further options are being modelled shows how tough the trade‑offs between climate ambition and fiscal restraint are becoming.
