Battery rebate calculator

Battery rebate and savings calculator

Estimate the federal Cheaper Home Batteries discount for your installation date, any state rebate you may qualify for, what you'd pay, and how long the battery could take to pay for itself. No sign-up needed.

Your home and battery

No sign-up and no contact details. Your answers stay in your browser.

Where you live

State or territory

Postcode

Your solar and battery

Existing solar system size (kW)

Enter 0 if you'll add solar at the same time.

Battery usable capacity (kWh)

On the quote or datasheet, e.g. 13.5.

Installation cost before discounts ($)

The full quoted price, before the federal discount.

Proposed installation date

The federal discount drops on set dates, so this matters.

Your electricity bill

Average quarterly bill ($)

Import tariff (cents per kWh)

The usage charge on your bill, e.g. 30.

Feed-in tariff (cents per kWh)

What you're paid for solar you export, e.g. 5.

Daily battery use (kWh)

How much the battery supplies on a typical day. If you're not sure, about 80% of its usable capacity.

Adjust the assumptions (optional)

Certificate (STC) price ($)

Up to $40.

Battery capacity fade (% a year)

Electricity price change (% a year)

How the federal battery discount works

The Cheaper Home Batteries Program gives small-scale technology certificates (STCs) for each kWh of a battery's usable capacity. Installers sell the certificates and take the value off your price, so it appears as a discount on your quote rather than a payment to you.

The number of certificates per kWh falls every six months. From 1 May 2026, capacity above 14 kWh earns 60% of the full rate and capacity above 28 kWh earns 15%, and only the first 50 kWh counts. Certificates are rounded down to a whole number.

Certificates per kWh of usable capacity, by installation date (checked 14 October 2026)
Installed	Certificates per kWh	Size tapering
1 July 2025 to 31 December 2025	9.3	No
1 January 2026 to 30 April 2026	8.4	No
1 May 2026 to 31 December 2026 (current)	6.8	Yes
1 January 2027 to 30 June 2027	5.7	Yes
1 July 2027 to 31 December 2027	5.2	Yes
1 January 2028 to 30 June 2028	4.6	Yes
1 July 2028 to 31 December 2028	4.1	Yes
1 January 2029 to 30 June 2029	3.6	Yes
1 July 2029 to 31 December 2029	3.1	Yes
1 January 2030 to 30 June 2030	2.6	Yes
1 July 2030 to 31 December 2030	2.1	Yes

Sources: Clean Energy Regulator and the amending regulations' explanatory statement. The rate is set by the date the installation is certified, which is normally the installation date.

State battery incentives

Queensland: No current state rebate found on an official government website.
New South Wales: NSW offers an incentive for connecting a battery to a virtual power plant (VPP), paid through approved VPP providers. The amount depends on the provider and isn't included in this estimate. Source
Victoria: No current state rebate found on an official government website.
South Australia: No current state rebate found on an official government website.
Western Australia: WA Residential Battery Scheme: Synergy customers up to $1,300, Horizon Power customers up to $3,800, with conditions including joining a virtual power plant. Source
Tasmania: No current state rebate found on an official government website.
ACT: No current state rebate found on an official government website.
Northern Territory: No current state rebate found on an official government website.

Checked 14 October 2026. Rules change, so confirm with your installer before you sign.

Next steps

Compare every approved home battery: capacity, warranty and datasheets.
Home battery brands compared
Virtual power plants explained: some state rebates require one.
Latest rebate and rule changes from the regulators.
Compare home battery quotes from up to 3 local installers.