Commercial solar in Wollongong
A 100 kW commercial system in Wollongong earns about $25,567 off upfront in federal certificates and makes about 138 MWh a year. Systems up to 1 MW now qualify, so the discount scales with your roof.
We don’t install. We give you the numbers for Wollongong, then hand you to Green, our solar partner, who designs and installs commercial systems across New South Wales and the rest of Australia.
What commercial solar is worth in Wollongong
For systems installed in 2026, using the Clean Energy Regulator’s zone 3 rating for Wollongong (1.382 MWh per kW per year) and $37 a certificate.
| System | Output a year | Certificates | Upfront discount | Indicative saving a year |
|---|---|---|---|---|
| 30 kW | 41 MWh | 207 | $7,659 | $6,000 |
| 99 kW | 137 MWh | 684 | $25,308 | $19,800 |
| 250 kW | 346 MWh | 1,727 | $63,899 | $50,000 |
| 500 kW | 691 MWh | 3,455 | $127,835 | $100,000 |
| 1 MW | 1,382 MWh | 6,910 | $255,670 | $200,000 |
Savings are scaled from the federal government’s worked example (a 250 kW system saving about $50,000 a year, as reported) by Wollongong’s solar output. Your real saving depends on how much you use on site and your tariff. Up to 100 kW uses the small-scale deeming period; over 100 kW gets a fixed 5 years.
Each kW in Wollongong is rated to make about 17% more power than the same kW in Melbourne or Hobart.
Business power prices in Wollongong
The regulator’s default price for a small business using 10,000 kWh a year on a flat tariff:
- Endeavour Energy (the Illawarra): $4,343 a year, about 43c per kWh including fixed charges.
Source: AER default market offer 2026–27, small business. GST inclusive. Larger sites on negotiated contracts pay different rates.
Every kWh of solar you use on site is a kWh you don’t buy at those rates. Power you export earns far less, so solar pays back fastest for businesses that run through the day.
The local network is Endeavour Energy. Larger systems need its connection approval, which is often the longest step, so Green starts that application early.
Add a battery and NSW takes 30 to 40% off it
Wollongong businesses can stack the NSW business battery discount (batteries from 20 kWh) on top of the federal solar certificates: about 30 to 40% off with new solar, or 20 to 30% for a battery on its own. How the NSW business battery discount works.
Get a commercial solar quote in Wollongong
Green, our solar partner, designs and installs commercial systems in Wollongong, from 30 kW to 1 MW, and handles the certificates and network approval. Free, no obligation, and we earn a commission only if you go ahead.
Get a commercial quoteCommercial solar in Wollongong: questions
- How much is the commercial solar rebate in Wollongong?
- It comes as federal certificates (STCs) that your installer takes off the price. In Wollongong (CER zone 3), a 100 kW system installed in 2026 earns 691 certificates, about $25,567 at $37 each. A 250 kW system earns about $63,899. The certificate price moves, so treat these as estimates.
- How much power does commercial solar make in Wollongong?
- The Clean Energy Regulator rates Wollongong at 1.382 MWh per kW per year, so a 100 kW system is deemed to make about 138 MWh a year. Real output depends on roof direction, shading and tilt.
- Does the commercial solar rebate drop in the new year?
- For systems up to 100 kW, yes: the deeming period shortens each 1 January, so a 99 kW system in Wollongong drops from about $25,308 off in 2026 to about $20,239 in 2027. Systems over 100 kW (up to 1 MW) get a fixed 5-year deeming period, so their certificate count doesn't drop in 2027.
- Who installs commercial solar in Wollongong?
- We pass enquiries to Green, our solar partner, which designs and installs commercial systems across Australia, including Wollongong. You get one installer, not a lead auction, and we earn a commission only if you go ahead.
Commercial solar in other cities
Reviewed by James Baker, Founder, EnergyPlans.com.au. Data last verified 12 November 2026. Methodology.