The STC Rebate Factor on Solar Battery dropped 8.4 → 6.8. Calculate how much rebate you can get for your Solar Battery setup after May 01, 2026.
Battery sizing helper
Choose your method — takes 30 seconds.
Find it on your latest bill, or estimate with the slider. (15–60 kWh)
Battery covers the night portion when solar is off.
What’s the kW size of your existing or planned solar system?
Typical range
10–13 kWh battery
Popular sizes for this solar setup:
Pick the one that matters most — we’ll recommend a size.
Before vs. after · STC factor 8.4 → 6.8
Lock in the higher rebate before May 01, 2026 — or pay the difference.
Small homes, evening peak only
Full night coverage for most homes
Large homes, extended backup
Virtual Power Plant adds on top: +$550 (10 kWh) · +$743 (13.5 kWh) · +$1,100 (20 kWh)
Quick checklist
Make sure your setup ticks every box before you claim — we’ll verify these for you during the quote.
Federal rebate
NSW bonus
Understanding STCs
Behind the scenes, your “rebate” is a stack of government-issued certificates that your installer sells for you. Here’s the journey from your roof to your invoice.
The federal scheme creates a fixed number of Small-scale Technology Certificates (STCs) per kWh of approved battery.
Example 13.5 kWh battery = 91.8 STCs
STCs trade on an open market — price moves daily based on supply and demand, like a commodity.
Today ~$37 per STC (range $35–40)
When you sign the contract, you assign your STCs to the installer. They handle the paperwork and pay you the dollar value.
Maths 91.8 × $37 = $3,397
You never see the certificates change hands — the $3,397 just appears as a line item on your invoice, off the top.
You pay the lower price, day one
Key points to remember
Common rebate amounts — NSW with VPP, federal + state stacked
| Battery | Before May 01 | After May 01 | You lose |
|---|---|---|---|
| 10 kWh | $3,650 | $3,070 | −$580 |
| 13.5 kWh Most popular | $4,943 | $4,143 | −$800 |
| 20 kWh | $7,256 | $5,468 | −$1,788 |
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