In short
- Solar pays for most South Australian wineries, but the sums turn on one thing: exports are worth almost nothing in this state, so the system has to be sized to the load, and the load is lumpy.
- Vintage (February to April) is when a winery uses the most power and the sun is still strong. Outside vintage, cellar door, barrel hall cooling and bottling carry a smaller daytime load.
- Every system up to 200 kVA must be dynamic-export capable, so SA Power Networks can turn exports down remotely. A system sized to the winery's own use is barely affected.
Yes, solar pays for most wineries in South Australia in 2026, provided the system is sized to what the winery uses rather than the size of the shed roof. South Australia has the highest share of rooftop solar in the country, midday wholesale prices often sit at or below zero, and a winery's export credit follows them down. The return comes from the power the winery stops buying: refrigeration through vintage, barrel hall cooling through summer, the cellar door, pumps and bottling. This page covers what changes for a South Australian site. The general case is on solar for wineries.
| Quick facts | Winery solar in South Australia |
|---|---|
| Regions | Barossa, Eden Valley, McLaren Vale, Clare, Adelaide Hills, Langhorne Creek, Coonawarra, Riverland |
| Distributor | SA Power Networks (the whole state) |
| STC zone | Zone 3, rating 1.382 for Adelaide; regional postcodes to confirm |
| State help | No state rebate; the federal STC discount only |
| Export value | near zero; size to the load |
| What to send | one recent bill for each meter; we get the interval data from it |
What's different in South Australia?
1. One network, dynamic exports everywhere
Every South Australian winery, from the Barossa to Coonawarra, connects to SA Power Networks, so the process is the same statewide and the most predictable of any state.
- Up to 30 kVA: a small embedded generator connection, dynamic-export capable since 2024.
- 31 to 200 kVA: a medium connection, also dynamic-export capable: the network can lower the export limit remotely when the grid is congested. A 100kW winery system sits in this band.
- Above 200 kVA: a negotiated connection with its own export agreement.
Many vineyards sit on long rural feeders, and some on single-wire earth return lines, where the network caps exports at very little or zero per connection. For a winery that uses most of its solar in vintage, the limit matters mainly in the quiet months, when a roof-sized system would otherwise export. The Adelaide commercial solar page has the city detail.
2. STC zone 3 in Adelaide, regional zones to confirm
Adelaide postcodes sit in STC zone 3, rating 1.382. For a 2026 install the scheme counts five years, so a 100kW system earns 100 × 1.382 × 5 = 691 certificates, rounded down. The Barossa, McLaren Vale and Clare are close to Adelaide and expected to share zone 3; the Riverland and Coonawarra postcodes need checking against the Clean Energy Regulator's postcode table. Since 1 October 2026 the discount covers eligible systems up to 1MW on a site.
3. No state rebate
The South Australian Government has no commercial solar rebate; the current list is on energy.gov.au. A few councils run their own incentives, and the City of Adelaide's scheme does not reach the wine regions. For nearly every winery the STC discount is the whole of the upfront support, and the ATO's instant asset write-off is the main tax point, covered on our cost page.
4. Vintage, heat and the quiet months
A South Australian winery's year has one big load and several small ones. From February to April, crushing, fermentation cooling and must chilling run day and night, and the refrigeration plant is the biggest load on the site. That is also high summer, when panels make the most. Through the rest of the year the load is barrel hall and bottle store cooling through the hot months, the cellar door and restaurant in trading hours, bottling runs, and transfer pumps. Winter is the quiet time: low load, lower sun.
Frost fans, where a vineyard has them, run on cold nights in spring and contribute nothing to the solar case. Irrigation pumps on the vineyard are usually on their own meter and sized separately, as on our irrigation page.
Put together, a winery uses a high share of its solar in vintage and a lower share for the rest of the year. Across twelve months, 60 to 70% self-use is a reasonable planning figure for a site with a cellar door and year-round cooling, lower for a crush-only facility.
A worked example for a South Australian winery
Here is a worked example with made-up figures. These are example figures, not our prices or a real site. The price is the one our commercial solar cost page uses for a 100kW system.
- A 100kW system in the Barossa, assumed to make about 1,450 kWh per kW a year, the Adelaide city page's figure, so about 145,000 kWh a year.
- The winery uses about 65% of that itself across the year, 94,250 kWh: nearly all of it in vintage and summer, far less in winter. 50,750 kWh goes to the grid.
- At $0.28 for each kWh the site no longer buys: 94,250 × $0.28 = $26,390. Exports are counted at $0, because a South Australian business usually earns little or nothing for them.
- Yearly saving $26,390. At an example price of $73,000 after the STC discount, that pays back in about 2.8 years.
If the retailer does pay $0.05 for exports, the saving rises by about $2,538 to $28,928 and the payback shortens to about 2.5 years. The difference between the two is the whole of the export question, which is why a South Australian proposal should show both.
The better move is often a smaller system. Sized to the summer and vintage daytime load rather than the roof, perhaps 60 to 70kW on this example site, self-use climbs towards 80% and the payback shortens, because fewer panels are making power that earns nothing in July. The proposal should show two sizes with the sums, so the winery can see where the extra panels stop paying.
What to send
Just one recent electricity bill for each meter, every page. Using the meter number on it, we get your interval data, which shows the vintage peak, the summer cooling load and the winter trough. You don't need to request anything from your retailer.
If you know them, mention the refrigeration capacity, whether there is a cellar door or restaurant, and whether the irrigation pumps are on the same meter. Send a bill and an accredited installer prepares a costed proposal sized to how your winery uses power. Already have a quote? Compare it line by line with our checklist, starting with how much export income it counts on.