Battery rebate calculator
Enter your battery's usable capacity to see the federal Cheaper Home Batteries discount, and how it changes if the install is signed off later.
Use the usable figure from the datasheet, not the nominal one.
The date on the certificate of electrical compliance sets the factor.
How it is worked out
| Band | kWh | Rate | Certificates |
|---|---|---|---|
| First 14 kWh | 13.5 | 100% | 91.80 |
| 14 to 28 kWh | 0 | 60% | 0.00 |
| 28 to 50 kWh | 0 | 15% | 0.00 |
| Total, rounded down | 91 | ||
Estimated federal discount
$3,370 to $3,640
91 certificates at $37 to $40 each, factor 6.8
The same battery, signed off later
- May to Dec 2026$3,640
- Jan to Jun 2027$3,040
- Jul to Dec 2027$2,800
- Jan to Jun 2028$2,480
- Jul to Dec 2028$2,200
- Jan to Jun 2029$1,920
- Jul to Dec 2029$1,640
- Jan to Jun 2030$1,400
- Jul to Dec 2030$1,120
Upper end of the range. The program ends after December 2030.
What this does not include
This is the federal discount only. Some states add their own incentive, often tied to joining a virtual power plant. See rebates by state for what applies where you live.
To be eligible the battery must be installed with solar, be on the Clean Energy Council approved list with its inverter, and be installed by an accredited installer. Our guide on how the federal battery rebate works covers every condition.
Common questions
How is the federal battery rebate calculated?
Certificates are created on the battery's usable capacity: the first 14 kWh at the full factor, 14 to 28 kWh at 60%, and 28 to 50 kWh at 15%. The total is rounded down and each certificate is worth about $37 to $40. At the current factor of 6.8, a 13.5 kWh battery earns 91 certificates, about $3,370 to $3,640.
Why is the rebate a range, not one number?
Certificates are traded, and their price moves. The Clearing House price of $40 is the ceiling, and installers often value them a little lower. Your quote should show the exact amount your installer is taking off.
What happens to the rebate on 1 January 2027?
The factor drops from 6.8 to 5.7. What counts is the date on the certificate of electrical compliance, so a battery signed off after that date earns the lower amount even if you signed the contract earlier.
Do I claim the battery rebate myself?
Usually not. The installer creates the certificates and takes their value off your price, so you see it as a discount on the quote. Check it is shown as its own line.