Neoen Starts Building 346 MW Goyder North Wind Farm for BHP

Neoen started construction today on the 346 MW Goyder North Wind Farm near Burra in South Australia’s Mid North. Before a single turbine stands, a large share of its future output is already sold to BHP under a 10-year contract, which makes a copper miner the project’s most important backer.

That arrangement is becoming the template. Long-term, battery-backed renewable contracts signed by miners give developers the revenue certainty lenders want. That is what makes large wind and battery builds in South Australia financeable.

Goyder North is the clearest current example of that model moving from proposal to construction.

Here is who is paying for this capacity, what it is expected to deliver by 2029, and which of the headline claims still rest on the developer’s word alone.

Who is paying for 100 MW of wind that has not been built yet?

The answer is not a government grant. It is a supply contract with a miner.

On 24 September 2025, Neoen and BHP signed a deal for 100 MW of 24/7 baseload renewable power for 10 years from July 2029. Baseload means a steady, constant level of supply around the clock. The power will come from the first 300 MW of Goyder North and will be firmed (smoothed into a constant flow) by the planned Goyder Battery.

The electricity will supply BHP’s Copper South Australia (Copper SA) operations: Olympic Dam, including its smelter and refinery, plus Carrapateena and Prominent Hill. BHP describes it as its third renewable electricity deal for Copper SA.

It builds on an earlier one. In November 2022, the pair signed a 70 MW deal for Olympic Dam that the Sydney Morning Herald called “first-of-its-kind.” Supply began in July 2025 from Goyder South Stage 1 and the Blyth Battery. That deal covers about half of Olympic Dam’s needs on a 24/7 basis, according to Neoen.

Together with the existing Neoen supply, BHP expects about 70% of Copper SA’s electricity to come from renewables in FY2030, based on its forecast demand. RenewEconomy put the developer’s side of the bargain plainly:

RenewEconomy on the 100 MW deal A “new and bigger ‘baseload renewable’ supply agreement” that will “underpin the development of Neoen’s new Goyder North wind project and a new big battery at the site.”

For you, the takeaway is straightforward. A bankable decade-long contract from a creditworthy miner is why this project exists in its current form. That points to where the next wave of Australian renewable capacity is likely to come from.

Corporate renewable energy procurement has shifted from a sustainability gesture to a financing tool, because a creditworthy industrial buyer signing a long contract gives lenders the revenue certainty that merchant exposure never could.

What is actually being built at Goyder North Stage 1?

The specifications are firm and backed by contracts:

• Capacity: 346 MW across 48 Vestas V172-7.2 MW turbines
• Contractors: notices to proceed (formal instructions to begin work) issued to Vestas for turbines and Downer for connection and transmission
• Grid connection: ElectraNet’s existing Bundey Substation
• Expected output: 1.3 TWh a year, according to Neoen (a terawatt-hour is a billion kilowatt-hours)
• Jobs: around 500 in construction and more than 10 permanent roles
• Commercial operation: targeted for 2029

The site sits near Burra on the lands of the Ngadjuri Nation. The state government approved the project in 2024.

The capacity has also grown. Earlier project documents described Stage 1 as up to 300 MW, so 346 MW is the confirmed final figure. No standalone capital cost for Stage 1 has been published, although Indaily placed it within a state renewables pipeline “hitting billions.”

What is confirmed and what is Neoen’s claim

Approval, turbine orders, the grid connection point and the BHP contract are documented facts.

The headline output claims are a different matter. Neoen says the 1.3 TWh of annual output amounts to roughly a 10% lift in South Australian wind generation. No published baseline for total state wind generation was found to test that figure.

AEMO’s South Australian Electricity Report 2025 is the independent baseline for state wind generation, curtailment and negative pricing, and it is the benchmark against which Neoen’s projected 10% lift in wind output would need to be tested.

You should treat the 10% figure as a company projection, not a verified benchmark. The 346 MW and the 48-turbine order are the numbers that will hold.

How does wind become 24/7 supply, and where could it fall short?

Wind is variable, so a flat 24/7 contract needs a buffer. The firming cycle works like this:

1. The turbines generate power whenever the wind blows.
2. In strong wind, surplus output charges the Goyder Battery.
3. In lulls, the battery discharges to hold supply at the contracted level.
4. Neoen handles forecasting and market bidding, so BHP receives a steady supply without managing the variability itself.

The battery is now cited at 454 MW / 1,814 MWh, up from a minimum of 200 MW / 800 MWh in earlier agreement documents. Megawatts measure how fast it can deliver power, while megawatt-hours measure how much energy it holds. Site works began in August 2026 next to Bundey Substation, and Stage 1 is expected online in 2028.

The risks that remain

The mechanism is sound on paper. Several pressure points could still test it:

• Delivery and cost: construction windows of roughly 18-30 months carry the usual risks of delays, supply-chain problems and cost escalation, and the July 2029 start leaves limited slack.
• Curtailment and negative prices: South Australia’s high renewable share already produces periods when wind output is curtailed (deliberately cut back) and prices fall below zero.
• Low-wind stretches: extended calm periods could still require backup from the wider grid.
• Transmission: siting the battery at a strong grid node like Bundey helps but does not remove congestion risk.

No documented community or heritage concerns tied to Stage 1 or the battery were found.

The firming promise depends on storage size and delivery timing. That makes July 2029, not today’s construction start, the milestone to watch.

Where does Goyder North sit in South Australia’s wider build-out?

The wind farm is one piece of the 1.2 GW Goyder Renewables Zone, a cluster of projects around Burra.

The Australian Energy Market Operator’s (AEMO) South Australian Electricity Report 2025 recorded 204 MW of wind capacity growth in 2024-25, driven by Goyder South 1B. Once Stage 1 is running, the North and South farms together are expected to produce about 2.5 TWh a year. No current figure for the state’s total wind generation or renewable share was found in the available material.

The direction is clear even without that figure. BHP’s coverage has grown from one mine site to a whole province. Indaily framed the wider pipeline as a “green goldrush,” and RenewEconomy linked the project to the state’s push toward 100% renewables.

Mining load is increasingly driving South Australia’s electrification, and large industrial buyers are now shaping which generation and storage assets reach a final investment decision.

If you are assessing energy prices, grid planning or resource-sector power costs, note that large industrial buyers are increasingly deciding what gets built in South Australia.

What the construction start settles, and what 2029 still has to prove

A financed construction start, a 10-year BHP contract and committed contracts with Vestas and Downer make delivery far more credible than a proposal would be.

Three items remain open:

• whether the 10% generation lift holds against an independent state baseline
• the battery’s final built size
• whether supply begins on time in July 2029

For anyone following South Australian renewables or BHP’s copper operations, those milestones are the real test of whether the miner-backed model scales. Watch the battery’s progress through 2028 first.

For readers wanting the wider decarbonisation picture, our deep-dive into BHP’s net zero targets examines how power contracts like this one fit against the miner’s harder-to-abate emissions.

These statements are speculative and subject to change based on market developments and company performance. Past performance does not guarantee future results. Financial projections are subject to market conditions and various risk factors.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions.