What are the solar and battery rebates worth in 2223, Mortdale?

2223 covers Mortdale, Oatley, in New South Wales. It sits in STC Zone 3 (rating 1.382), so a 6.6 kW solar system installed in 2026 creates 45 certificates, about $1,665 off the quote, and a 10 kW system 69 certificates, about $2,553. The federal battery discount is about $252 a usable kWh until 31 December 2026. New South Wales's own programs are in the table below. Checked 23 September 2026.

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Installed so far in 2223The Clean Energy Regulator has recorded 2,010 rooftop solar systems (15 MW), 449 home batteries and 350 heat pump hot water systems in 2223, as at 31 August 2026. Recent months are still being reported.

Federal solar certificates in Zone 3, by system size.

Certificates = kW × 1.382 × years left in the scheme, rounded down, at $37 a certificate. Every installer sets its own price per certificate, so the count is what should match your quote. To check a quote with its own price, use the STC calculator on Rebate Calculator.

Postcode 2223, STC Zone 3: 2026 installs versus 1 January 2027
System size	Certificates in 2026	Value in 2026	Certificates from 2027	Value from 2027
5 kW	34	about $1,258	27	about $999
6.6 kW	45	about $1,665	36	about $1,332
8 kW	55	about $2,035	44	about $1,628
10 kW	69	about $2,553	55	about $2,035
13.2 kW	91	about $3,367	72	about $2,664

Federal battery discount, any Australian postcode
Usable capacity	Value to 31 December 2026	Value from 1 January 2027
10 kWh	about $2,516	about $2,109
13.5 kWh	about $3,397	about $2,847
16 kWh	about $3,824	about $3,206

New South Wales programs that stack on top.

New South Wales incentives on top of the federal ones, checked against the administering body
Program	Amount	Conditions	Checked
New South Wales: Home Energy Saver loan	up to $15,000 at 0% interest	Owner-occupiers and landlords with combined taxable income up to $210,000; covers solar, batteries, heat pump hot water and reverse-cycle; open since 17 June 2026	23 September · energy.nsw.gov.au
New South Wales: Peak Demand Reduction Scheme battery (VPP) incentive	set by the VPP provider	An eligible battery connected to an eligible virtual power plant; the rules were updated on 1 April 2026	23 September · energy.nsw.gov.au

Which upgrade are you looking at in 2223?

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Questions people ask about 2223.

Which STC zone is postcode 2223 in?

Zone 3, rating 1.382, on the Clean Energy Regulator's postcode table. That rating times the system size in kW times the deeming years (5 for 2026 installs, 4 for 2027) gives the certificate count, rounded down.

How much is the solar rebate on a 6.6 kW system in Mortdale?

45 certificates in 2026, about $1,665 at $37 a certificate, taken off the quote by the installer. From 1 January 2027 the same system gets 36 certificates, about $1,332.

Is there a battery rebate in 2223?

Yes, the federal Cheaper Home Batteries discount applies in every state: about $252 a usable kWh on the first 14 kWh for installs to 31 December 2026 (about $2,520 on 10 kWh), stepping down to about $211 a kWh from 1 January 2027. New South Wales adds the programs in the table on this page. The regulator has recorded 449 home batteries in 2223 so far.

Nearby postcodes: 2220 Hurstville · 2221 Blakehurst · 2222 Penshurst · 2224 Kangaroo Point · 2225 Caravan Head · 2226 Bonnet Bay. Installation counts from the Clean Energy Regulator; zone from its postcode table; figures are published maximums checked 23 September 2026. Victorian postcodes are under Victoria by postcode.