What are the solar and battery rebates worth in 5608, Mullaquana?

5608 covers Mullaquana, Whyalla Norrie, Whyalla Norrie East and 2 more, in South Australia. 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. South Australia's own programs are in the table below. Checked 23 September 2026.

Call 1300 451 322 See the figures

Installed so far in 5608The Clean Energy Regulator has recorded 2,782 rooftop solar systems (16 MW), 139 home batteries and 284 heat pump hot water systems in 5608, 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 5608, 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

South Australia programs that stack on top.

South Australia incentives on top of the federal ones, checked against the administering body
Program	Amount	Conditions	Checked
South Australia: Retailer Energy Productivity Scheme	no fixed amount	Discounts delivered through obliged retailers and approved providers, including connecting a battery to a virtual power plant; 2026 to 2030 period	23 September · energymining.sa.gov.au

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Questions people ask about 5608.

Which STC zone is postcode 5608 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 Mullaquana?

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 5608?

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. South Australia adds the programs in the table on this page. The regulator has recorded 139 home batteries in 5608 so far.

Nearby postcodes: 5605 Butler · 5606 Kirton Point · 5607 Boston · 5609 Cowleds Landing · 5611 Cooyerdoo · 5630 Edilillie. 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.