How the federal battery discount and solar STCs are calculated, which state incentives remain, what drives the price of a battery and the rules a system must meet.
The price you pay for a home battery in Australia is the installer's price minus the value of the certificates the system creates. Since the Cheaper Home Batteries Program began on 1 July 2025, batteries create small-scale technology certificates (STCs) under the Small-scale Renewable Energy Scheme, the same scheme that has discounted rooftop solar for years. From 1 May 2026 the battery discount was reshaped: the STC factor now steps down every six months, and the full factor applies only to the first 14 kWh of usable capacity, with reduced rates above that up to 50 kWh.
This section explains each piece. Start with the overview of the 2026 battery rebate, then read how the STC factor and size tiers work, how solar STCs shrink each year until the scheme ends in 2030, which state and territory incentives are still open (NSW's VPP incentive and the WA Residential Battery Scheme, for example), and what makes one battery quote dearer than another.
Figures taken from official pages name their source and the date we checked them. Battery prices, STC prices and savings used in examples are illustrative only: ask installers for written quotes and use the Clean Energy Regulator's STC calculator for the exact certificate count.
Battery Costs, Rebates and 2026 Rules
Every condition a home battery must meet to create STCs under the Cheaper Home Batteries Program — CEC list, VPP capability, SAA installer, AS/NZS 5139, one per NMI, stays to 2030.
Battery Costs, Rebates and 2026 Rules
How the battery STC factor works after 1 May 2026 — the six-monthly step-downs to 2030, the 14, 28 and 50 kWh tiers, worked examples and why the install date matters.
Battery Costs, Rebates and 2026 Rules
Why a battery's saving is the gap between your import rate and feed-in tariff, how falling feed-in rates, the Solar Sharer Offer and Midday Power Saver change that gap, with examples.
Battery Costs, Rebates and 2026 Rules
What makes one home battery quote dearer than another — usable kWh, inverter type, backup, switchboard and phase, brand and warranty — with an illustrative price build-up.
Battery Costs, Rebates and 2026 Rules
The 2026 home battery rebate explained — Cheaper Home Batteries Program STC factors after 1 May 2026, size tiers, eligibility, state incentives and how to check a quote.
Battery Costs, Rebates and 2026 Rules
How STCs discount rooftop solar in 2026 — system size, postcode zone, the deeming period that falls each year to 2030, a worked example and how it combines with a battery.
Battery Costs, Rebates and 2026 Rules
Which state and territory battery incentives are open in October 2026 — the NSW VPP incentive, WA Residential Battery Scheme, Victorian loans, ACT loans — and how they stack with the federal discount.
Battery Costs, Rebates and 2026 Rules
How a VPP uses your home battery, how payments and incentives work in NSW and WA, the trade-offs for your own savings, and the contract terms to compare before joining.
