Ask a Western Australian homeowner what they want to know before putting a battery on the wall, and the question usually comes out in one line: what does the rebate actually do for me?
It sounds like a question with an answer. It isn’t – not on its own.
What a rebate is worth to a particular household depends on the DEBS export rates, that household’s Synergy tariff, the state scheme running that quarter, the federal program and its current step-down, and the connection rules that apply to their system size. Change any one of those and the answer changes. On 1 May 2026, several of them changed at once.
That is the first problem. There is a second one, and it is more interesting.
