A home battery is worth it when it replaces more expensive grid power than the solar it stores would have earned as exports. That test works the same in Launceston as in Alice Springs, but the inputs differ by town. This page walks through the maths once and then flags what changes locally for Launceston, Mandurah, Bunbury, Albury-Wodonga, Wagga Wagga, Dubbo, Rockhampton and Alice Springs.
The federal discount is the same everywhere
The Cheaper Home Batteries Program gives STCs for batteries of 5 to 100 kWh usable capacity, with up to 50 kWh eligible. The battery needs to be CEC-approved, VPP-capable and installed by an accredited installer. At the time of writing the factor is 6.8, stepping down to 5.7 on 1 January 2027 and 5.2 on 1 July 2027.
Since 1 May 2026 the first 14 kWh earns at 100% of the factor, 14 to 28 kWh at 60% and 28 to 50 kWh at 15%. A 10 kWh battery therefore earns about 68 STCs now (10 x 6.8). At the roughly $38 to $40 spot range that is around $2,600 to $2,700 off the invoice, falling to roughly 57 STCs in January. Use the battery STC calculator for your exact size. Postcode does not matter for batteries, unlike rooftop solar zone ratings.
What actually decides the payback
Three things matter more than the rebate:
- Evening usage. A battery pays by shifting solar into the 5 pm to 10 pm window. Households with air conditioning, electric hot water or an EV charging at home get more out of it.
- Your feed-in tariff. If you export at a few cents per kWh and import at several times that, storing is worth far more than exporting.
- VPP and incentives. Retailer or aggregator VPP offers can add yearly credits, and some states layer on top of the federal discount. See how the numbers work over time.
What changes by town
Launceston (Tasmania). Hydro-heavy supply means wholesale peaks are less sharp, and the Tasmanian Energy Saver Loan has closed. Heating load in winter helps evening usage, but solar output is lower, so size the battery to your real surplus. See rebates in Launceston.
Mandurah and Bunbury (WA). The WA battery scheme is active and VPP-required at the time of writing, which can stack with the federal discount. Read the VPP contract length and control terms first. See Mandurah and Bunbury.
Albury-Wodonga. One urban area, two states. Albury is in NSW, where the PDRS VPP incentive and a commercial battery incentive from 1 September 2026 apply. Wodonga is in Victoria, where the Solar Victoria battery loan has closed. See Albury-Wodonga.
Wagga Wagga and Dubbo (NSW). Regional tariffs and strong solar make for a good fit. NSW BESS1 has been suspended since 1 July 2025, so rely on the federal discount and any VPP incentive. See Wagga Wagga and Dubbo.
Rockhampton (Queensland). Hot afternoons and high air-conditioning load suit a battery, and the QLD Battery Booster has closed, so the federal discount is the main help. See Rockhampton.
Alice Springs (NT). The NT battery scheme has closed. Alice Springs has very high solar yield, but the grid is isolated and network rules on export and connection can differ, so ask the installer about approvals. See Alice Springs.
What this means for you
Get two or three quotes, ask each installer for modelled bill savings using your actual tariff, and check the battery is on the CEC list. If the numbers only work with a VPP, read the contract before you sign. The wider picture is in the federal rebate guide, and the battery STC explainer covers how installers claim.