Solar battery in Perth
In Perth you can stack two discounts: the federal one and the WA Residential Battery Scheme. You must join a VPP for the WA rebate [SB-S008, C].
One Perth installer sells a 1-module Sigenergy (9 kWh) for $5,990 after both rebates, as at 22 October 2026 [SB-S093, C].
We haven't installed or used these batteries ourselves. This page is research from government pages, manufacturer documents and installer price lists, each linked and dated.
What it costs in Perth
| Size (Sigenergy) | Positive Energy, as at 22 Oct 2026, single phase, after WA + federal rebates [SB-S093, C] |
|---|---|
| 9 kWh | $5,990 |
| 18 kWh | $10,490 |
| 27 kWh | $13,190 |
| 36 kWh | $16,690 |
Prices are for homes from Yanchep to Mandurah with a smart meter. Double storey or switchboard work costs more [SB-S093, C].
Horizon Power area prices: MISSING. Other brands: MISSING.
What WA adds
- Rebate up to $1,300 for Synergy customers [SB-S008, C].
- Up to $3,800 for Horizon Power customers [SB-S008, C].
- No-interest loan up to $10,000, if household income is under $210,000 [SB-S008, C].
- You must join a VPP [SB-S008, C].
- The state expected it to run into 2027, as of Dec 2025 [SB-S008, C]. Still open today: MISSING (re-check due).
One Perth installer puts the two rebates together at $6,810 on its 27 kWh solar-and-battery package [SB-S093, C].
WA homes installed 61,210 batteries under the federal scheme to 30 September 2026 [SB-S075, C].
Downsides
- The VPP is compulsory for the WA rebate. Part of your battery's use is shared (E, SB-S008).
- Exported solar earns only 2c per kWh outside 3pm–9pm on Synergy's buyback [SB-S097, C]. That's why storing it can pay.
Who it's not for
- No solar: no federal discount [SB-S003, C].
- If you won't join a VPP, you lose the WA rebate [SB-S008, C].
Will it pay for itself?
- Yearly saving ≈ kWh the battery covers each evening × 365 × (your peak rate − your feed-in rate) (E).
- Payback years = what you pay after discounts ÷ yearly saving (E).
- Check the warranty: most batteries we cover promise 70% of usable storage at 10 years, or a throughput cap, whichever comes first [SB-S053, SB-S055, SB-S057, SB-S059, C]. If payback is past 10 years, think twice (E).
See a worked example with a real published tariff on our Sigenergy price page (example only, use your own bill).
A seller must give you payback, sizing and warranty details before you sign [SB-S082, C].
Choosing an installer
- Solar Accreditation Australia battery accreditation. Check it [SB-S063, SB-S064, C].
- The exact system name on the CEC approved list, written on your quote [SB-S026, SB-S069, C].
- The install date and certificate count, in writing [SB-S004, C].
Related: Solar battery rebate · All batteries
To compare electricity plans, use the government's free tools: Energy Made Easy (NSW, Qld, SA, Tas, ACT) and Victorian Energy Compare (Vic).
Rules checked 3 November 2026. Next scheduled check: before 1 January 2027 (STC step-down), and monthly for WA and NSW.