WA Scheme — Synergy
Up to $1,300
- $130 per usable kWh
- Capped at 10 kWh usable
- VPP enrolment mandatory
- Min. 5.0 kWh usable
- Zero-interest loan available
Battery Rebate Calculator
Enter your details below. All figures are based on official rates verified 5 November 2026 and use usable kWh capacity (not nominal/nameplate).
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Adjust the slider to see your estimate.
WA Battery Rebates at a Glance
These three rebates can apply to the same battery installation. The WA scheme and federal CHBP are claimed together — your installer handles both as upfront invoice discounts.
Side-by-Side: WA Synergy vs Horizon vs Federal
| Scheme detail | WA — Synergy | WA — Horizon Power | Federal CHBP |
|---|---|---|---|
| Rate | $130 / usable kWh | $380 / usable kWh | Factor × tiered STCs × ~$38 |
| Maximum rebate | $1,300 | $3,800 | No stated cap (tiers reduce above 14 kWh) |
| Eligible kWh | Up to 10 kWh usable | Up to 10 kWh usable | Up to 50 kWh usable (tiered) |
| VPP required? | Yes — mandatory | Yes — mandatory | No (VPP-capable only) |
| Minimum battery size | 5.0 kWh usable | 5.0 kWh usable | No stated minimum |
| Zero-interest loan | Yes ($2,001–$10,000) | Not offered | Not offered |
| Who is eligible? | Synergy (Perth / SWIS) | Horizon Power (regional WA) | All eligible residential installs |
| Can stack? | Yes — stacks with CHBP | Yes — stacks with CHBP | Yes — stacks with WA scheme |
Source: WA Government (Jan 2026, updated May 2026); Clean Energy Regulator (1 May 2026). Verified 5 November 2026.
“What You’d Actually Pay” — Worked Example
Using an EXAMPLE battery price of $8,500 for a 10 kWh usable battery. Actual prices vary by model and installer.
With VPP (Synergy)
Battery price (example)$8,500
WA scheme rebate− $1,300
Federal CHBP (indicative)− $2,584
Out-of-pocket estimate~$4,616
Optional: Synergy zero-interest loan up to $10,000 covers this amount (income conditions apply).
No VPP (federal only)
Battery price (example)$8,500
WA scheme rebate$0 (VPP not enrolled)
Federal CHBP (indicative)− $2,584
Out-of-pocket estimate~$5,916
Skipping VPP costs $1,300 more and forfeits the zero-interest loan.
Indicative only. STC price (~$38) is market-set; installer confirms the final discount.
Eligibility: What You Need to Qualify
Both schemes have specific conditions. Your installer confirms eligibility before lodging. Missing either scheme condition means that rebate is $0.
How to Claim — Your Installer Handles Both
Both discounts appear on your invoice before you pay. Neither requires a government form after installation.
- Get a quote that includes both rebates. Ask your CEC-accredited installer to confirm the battery is on the utility Supported Solution List and CEC-approved for the CHBP. If either condition is missing, you lose that rebate.
- Choose your VPP provider. Enrol in Synergy Battery Rewards or an approved alternative before installation is complete. This is mandatory for the WA rebate.
- Sign the installation agreement including VPP enrolment. VPP participation is part of the paperwork. Without it, the WA rebate application cannot proceed.
- Federal CHBP discount — the installer assigns the STCs. The discount appears as a line item on your invoice. No government forms to complete.
- WA scheme — installer lodges the rebate claim. Once installation is complete and VPP confirmed, your installer lodges the application with Synergy or Horizon Power. The rebate is applied to your electricity account or refunded on your invoice.
- Zero-interest loan (Synergy, optional). Apply via Synergy to cover remaining out-of-pocket cost. Household gross income under $210,000. Loan cannot exceed battery cost minus rebate.
Act Before 1 January 2027: The Federal Factor Steps Down
The current STC factor is 6.8 (1 May – 31 Dec 2026). It then drops every six months through December 2030, when the scheme ends.
| Period | Factor | Federal rebate on 10 kWh (indicative, ~$38/STC) |
|---|---|---|
| Now — 31 Dec 2026 | 6.8 | ~$2,584 (highest available) |
| Jan – Jun 2027 | 5.7 | ~$2,166 |
| Jul – Dec 2027 | 5.2 | ~$1,976 |
| Jan – Jun 2028 | 4.6 | ~$1,748 |
| Jul – Dec 2028 | 4.1 | ~$1,558 |
| 2029 – 2030 | 3.6 → 2.1 | ~$1,368 → ~$798 |
Installing before 31 Dec 2026 saves ~$418 on the federal rebate for a 10 kWh battery vs waiting until January 2027. The WA scheme has no announced step-down as of November 2026.
Batteries That Qualify
These batteries are CEC-approved and on our install list. Supported Solution List status should be confirmed at the time of quoting.
GoodWe Lynx
Wall-mounted, multiple capacity options, compatible with GoodWe inverters.
iStore Battery
Floor-standing, Australian-brand battery, multiple capacity options.
Synergy Battery Rewards: What Does VPP Enrolment Actually Mean?
Enrolment in an approved VPP is mandatory to receive the WA Residential Battery Scheme rebate. It is also one of the main ways your battery generates ongoing returns beyond the upfront discount.
Synergy Battery Rewards is the primary VPP for Synergy customers. When Synergy calls a demand event (typically 3–9 pm), it remotely dispatches your battery. You are credited 70 c/kWh for every kWh exported during the event.
30
events per year (max)
6 hrs
max event duration
70 c
per kWh exported
3–9 pm
typical event window
Rough guide: 30 events × 4 hrs × 10 kWh at partial state of charge = approximately 60–80 kWh/year × 70 c = roughly $42–$56/year in VPP credits.
Outside of VPP events, you have full control over your battery. During a declared event, Synergy has dispatch control for the duration of that event only. Approved VPP alternatives to Battery Rewards exist — your installer will advise.
Frequently Asked Questions
Do I need to join a VPP to get the WA battery rebate?
Yes. The WA Residential Battery Scheme requires enrolment in an approved VPP — either Synergy Battery Rewards or an approved alternative. Without VPP enrolment the WA rebate is $0. The federal CHBP does not require VPP membership.
What is the minimum battery size eligible for the WA scheme?
5.0 kWh usable capacity. The federal CHBP has no stated lower limit but supports only up to 50 kWh usable.
How much is the WA Battery Scheme rebate?
Synergy: $130 per usable kWh, capped at $1,300 (at 10 kWh+). Horizon Power: $380 per usable kWh, capped at $3,800. Calculated on usable capacity, not nominal. Source: WA Government, Jan 2026 (updated May 2026).
Can I combine the WA scheme and the federal CHBP rebate?
Yes. The two schemes are separate and stack on the same installation. Your installer applies both as upfront discounts on your invoice.
Is there a zero-interest loan available with the WA scheme?
Yes, for Synergy customers. A loan of $2,001–$10,000 (3–10 year term, 0% interest) alongside the WA rebate. Household gross income under $210,000. Loan cannot exceed battery cost minus rebate.
When does the federal CHBP factor step down?
The current factor is 6.8 (1 May – 31 Dec 2026). It drops to 5.7 from 1 Jan 2027, then every six months until 31 Dec 2030. Installing before 31 Dec 2026 gives you the highest federal discount available. Source: Clean Energy Regulator.
What is the difference between the Synergy and Horizon Power rebates?
Synergy (Perth metro/SWIS): $130/kWh, max $1,300. Horizon Power (regional/remote WA): $380/kWh, max $3,800. The higher Horizon rate reflects higher electricity costs in regional areas. The federal CHBP applies equally regardless of retailer.
Can unit owners or renters claim the WA battery rebate?
Unit owners (unit-titled) are eligible subject to standard conditions including VPP enrolment. Strata properties may require body corporate approval. Renters who do not own the property cannot claim. The federal CHBP applies to any eligible residential installation.
I already have a battery installed — can I still claim?
No. Both schemes apply to new battery installations only. Adding a second battery may be eligible — confirm with your installer at the time of quoting.
Can I add a battery to my existing solar system and claim both rebates?
Yes. The rebates apply to the battery installation, not the solar panels. Your installer will confirm whether your existing inverter is compatible with the battery model you choose.
What happens if I leave the VPP after getting the WA rebate?
The specific obligations after the rebate is paid are set by the VPP provider’s agreement and the scheme requirements. Ask your installer to explain the ongoing VPP commitment before you sign. Any repayment obligation on early exit depends on the specific terms you agreed to.
Sources (all verified 5 November 2026): WA Residential Battery Scheme Requirements · Clean Energy Regulator: Battery Rebates Are Changing · Synergy Battery Rewards