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NSW passes gas, VIC breaks wind

Highlights from the Australian market

  • NSW is letting gas into its renewables scheme, with ASL consulting on a firming LTESA tender designed specifically to support gas-fired plants, a sharp contrast to the federal Capacity Investment Scheme, which excludes gas.
  • ASL’s 2026 Firming IIO Report sets a 1,500 MW pathway for new NSW firming capacity by May 2033 to cover the retirement of Bayswater and Vales Point, with projects needing to deliver for at least eight hours and a first tender due in 2027.
  • Victoria has given final state approval to WestWind Energy’s 1.5 GW Warracknabeal Energy Park, a 219-turbine wind farm with two 300 MW batteries that would be the largest in the Southern Hemisphere, though critics warn it depends on transmission lines like VNI West and the Western Renewable Link that are far from built.
  • The Climate Council warns coal and gas miners are using a Safeguard Mechanism loophole, classing projects as expansions rather than new facilities to avoid stricter best-practice limits, which it estimates will add 4.5 Mt of CO2 a year by 2035.
  • A new ACCR report argues WA doesn’t need Woodside’s Browse project to avoid a domestic gas shortfall from 2030, since exporters could supply more from existing projects, a claim rejected by Woodside, industry veterans and the Cook Government.
  • SA Energy Minister Tom Koutsantonis has hinted for the first time that SA may miss its 100% net renewables target for 2027, possibly slipping into 2028, after delays to the SA–NSW interconnector stalled new wind investment, though the state’s pipeline is now rebounding to nearly $32.5 billion of projects under construction or approved.
  • Buru Energy has referred its Rafael conventional gas project in the Kimberley to the WA EPA, claiming it could meet all of the region’s gas demand with first gas by early 2029, though environmentalists warn it could be a “Trojan horse for fracking”.

News from Japan

New whitepaper

Endgame Analytics’ latest whitepaper puts Byron Bay under the microscope. Using connected vehicle data from Compass IoT, we modelled what an extra 6,000 visiting EVs would mean for peak demand on the local substation.

The case study looks at a peak visitor day, when around 40,000 visitors join the town’s 11,500 residents, and assumes half of all visiting vehicles are electric.

Download the whitepaper: Electrifying the Light Vehicle Fleet – Endgame Analytics

Podcast of the week

Zugzwang: Episode 5 – Networks, power poles and the EV charging gap

The latest episode of Zugzwang: The market modelling podcast is now available!

Jack Simpson and Oliver Nunn are joined by Endgame Director Martin Chow and Russell Pendlebury, General Manager of Regulation and Policy at Energy Networks Australia, to dig into proposed rule changes that would let networks install curbside EV chargers on ordinary suburban power poles, and what it means for equity, network costs and bills.

Spotify: https://open.spotify.com/show/0346ILtbXgKJJIlOy64p1i
Apple Podcasts: https://podcasts.apple.com/us/podcast/zugzwang/id6801348317
YouTube: https://www.youtube.com/playlist?list=PLQ3gvq2Ccils

Sun(ken) Cable

Highlights from the Australian market

News from Japan

Podcast of the week

To tax or not to tax EVs (ABC Business Daily): Carrington Clarke and the e61 Institute’s Amy Tramontozzi explain what surging EV uptake and falling fuel excise revenue mean for the budget and how vehicles on our roads should be taxed.

Cold snap, gas cap

What GPG constraints would mean for WEM prices

25 August 2025: the day the SWIS hit the cap

On 25 August 2025, Real-Time Market (RTM) prices reached the then market price cap of $900/MWh. A polar cold front held Perth to a maximum of 11.4°C, its coldest day in more than 50 years, and heating demand surged. At the same time, heavy cloud cover with sporadic breaks made rooftop solar generation volatile, leaving operational demand forecasts inconsistent and unstable.

The system turned to its usual answer: gas. But pipeline constraints curtailed OCGT output just when it was needed most, and liquid fuel units were brought on to cover the gap (Figure 1). Elevated daytime prices also discouraged Battery Energy Storage Systems (BESS) from charging, and their state of charge was less than 40% at the start of the ESROD period[1].

Figure 1: Average RTM price ($/MWh) and generation (MW) by technology, 21 to 27 August 2025

Source: Endgame analysis of AEMO WEM market data.

The event showed that the SWIS must withstand weather and fuel supply limits arriving together. Based on the supply conditions during the event, we estimate that gas for power generation was effectively limited to 406 TJ/day.

Repeated days like that, in a system with no coal left may bring system stress. So we asked the question: what happens to the transition if gas is constrained this way in the future?

Our reference case: SWIS Success

Our SWIS Success scenario describes a hopeful transition, supported by timely transmission and wind build-out. Figure 2 shows how generation changes over time. The system starts mostly with thermal plants, with coal supplying 42% of generation in CY 2026. By CY 2031, coal is retired and wind supplies most of the energy, with gas and storage firming. Solar generation slowly grows over time, peaking at 20% of generation in 2050.

Figure 2: Annual generation (GWh) by technology, SWIS Success, CY 2026 to CY 2050

Source: Endgame WEM price projection, Q3 2026.

Gas does a lot of work in this picture. In CY 2031, the first year without coal, gas-powered generation supplies around 36% of the system’s energy. Its share falls to about 20% by CY 2040, but it remains the firming resource.

Squeezing the gas

To test the daily fuel offtake constraint, we ran a Gas squeeze sensitivity on SWIS Success. Everything stays the same except for two changes. Gas available to generators is capped at 406 TJ/day, and plants can switch to liquid fuel if they have the functionality.

Over a year, 406 TJ/day is a lot of gas. The SWIS burns well under half of that for power in a typical year. So the constraint does not bite on annual volume. It bites on certain days, when demand is higher and renewable resources are lower.

The bottom panel in Figure 3 shows how gas generation changes with the added constraint. Values below the line mean less gas generation in Gas Squeeze than in SWIS Success. From CY 2029, gas generation is lower in every year: by roughly 80 to 280 GWh a year through the 2030s and 2040s, and by more than 500 GWh in CY 2050. Most of that energy is replaced by solar and storage shifting across the day. Liquid fuel runs in CY 2026, 2027, 2029 and 2034, but never more than 13 GWh in a year.

Figure 3: Thermal generation (GWh) by technology, SWIS Success and Gas squeeze, and difference from SWIS Success

Source: Endgame WEM price projection, Q3 2026.

Small volumes, real price impact

The squeeze raises average prices across the whole horizon (Figure 4). On constrained days, gas becomes scarce and more expensive resources then set the price more often; liquid fuel is called on in the tightest periods.

Figure 4: Average RTM price ($/MWh), SWIS Success and Gas squeeze, CY 2026 to CY 2050

Source: Endgame WEM price projection, Q3 2026. Time-weighted average RTM prices.

Two periods stand out:

  • CY 2029 to CY 2034. The squeeze adds $7 to $10/MWh (7% to 10%) in every year except CY 2030. This is the period when coal is retiring, and gas carries the most firming. Note that in 2030, CIS projects enter as renewable generation increases and prices drop.
  • CY 2037 onwards. Once new transmission projects enter, the renewable and storage fleet has matured, the increase settles at a persistent $2 to $6/MWh, averaging about $3.40/MWh.

The system copes, but it pays more to do so.

Resilience has a price

When gas is constrained, the system can’t firm renewables as well, and the SWIS has to rely on more expensive generation. Our Gas squeeze sensitivity tests one constraint, based on a real event. It does not yet test a worse renewable drought, a major outage or a more extreme weather event on top of that constraint.

As the SWIS becomes a weather-dependent system, knowing how it performs in bad conditions matters as much as knowing the central case. System planning exercises need more analysis similar to this, especially as the transition occurs.

Want to know more?

Our WEM price projection covers a range of scenarios and sensitivities. Subscribers receive the full report, a briefing, the assumptions and summary workbooks and half-hourly modelling results.

Join us at our upcoming WEM price projection seminar or get in touch.

Results are from Endgame’s Q3 2026 WEM price projection (PLEXOS dispatch model). Prices are real, time-weighted average RTM prices in 2026 dollars. CY means Capacity Year: CY 2026 runs from 1 October 2026 to 30 September 2027.


[1] AEMO, 2026 WEM ESOO, https://www.aemo.com.au/-/media/files/electricity/wem/planning_and_forecasting/esoo/2026/2026-wem-electricity-statement-of-opportunities.pdf?rev=80281c368251452c84bfa16ab4eb9fcd&sc_lang=en

Bell Bay Blues

Highlights from the Australian market

News from Japan

  • Paywalled: Kyushu Electric’s incoming president, Norihiro Nakamura, says the utility is considering building new nuclear capacity, as demand in the region grows from AI data centres and semiconductor hubs such as TSMC’s.
  • Paywalled: TEPCO is tightening its grid connection rules to stop data centre developers holding queue spots without firm plans; from October 2026, it will cancel requests if the initial construction deposit (10% of estimated costs) isn’t paid within three months, or if development plans change during the application stage.

Podcast of the week

Zugzwang: Episode 4 – Benchmarking battery optimisers

The latest episode of Zugzwang: The market modelling podcast is now available!

Jack Simpson and Oliver Nunn are joined by Rakhesh Martyn, founder and CEO of Hachiko, to unpack how battery optimisers actually capture value. 

Spotify: https://open.spotify.com/show/0346ILtbXgKJJIlOy64p1i
Apple Podcasts: https://podcasts.apple.com/us/podcast/zugzwang/id6801348317
YouTube: https://www.youtube.com/playlist?list=PLQ3gvq2Ccils

Electrifying the Light Vehicle Fleet

Movement-driven charging demand and the limits of residential-anchored network planning – a Byron Bay case study


Endgame Analytics is pleased to share the third instalment of our decarbonising transport research series, this time turning to the light vehicle fleet and what happens when a large, mobile block of EV charging demand hits a network sized for locals, not visitors.


We modelled a Byron Bay case study, using Compass IoT connected vehicle data to size what an additional 6,000 visiting EVs would do to peak demand for the local substation. This reflects a peak visitor day, when around 40,000 visitors join 11,500 residents, and assumes half of visiting vehicles are electric. We also test how charger speed and tariff-driven charging behaviour change the result.


Some key highlights:

  • The peak roughly doubles on convenience charging alone: Against an 11.8 MW summer baseline, 6,000 EVs charging on arrival lift the peak to 23.9–25.1 MW, a 2.0–2.1x multiplier, regardless of charger speed.
  • Price signals could make it worse, not better: Time-of-use and solar-sharer tariffs synchronise the fleet to commence charging at the same time. On Level 2 (15 kW) chargers, peak demand rises to 91.9 -98.4 MW, 7.8–8.4x the 11.8 MW baseline, against about 25 MW for convenience charging.
  • Even perfect coordination doesn’t fully solve it: even the theoretical best case lifts the peak to 1.07x the baseline (12.6 MW) at 50% EV penetration, which would be 1.7x the baseline (19.5 MW) if EV penetration reaches 100%.


Pricing alone won’t coordinate this load. Direct load control, dynamic operating envelopes, and recognising the value drivers place on mobility will all need to be part of the answer, alongside the case for network augmentation itself.

Read the full paper here

Fill out the form to download the PDF

Get in Touch

Endgame Analytics are helping clients navigate these interactions between policy, technology, and economic strategy.

  • Martin Chow, Director (Endgame Analytics) | E: martin.chow@endgameanalytics.com.au
  • Benedict Chin, Analyst (Endgame Analytics) | E: benedict.chin@endgameanalytics.com.au

Divide by zero

Highlights from the Australian market

  • The Coalition has pledged to repeal a swathe of climate policies within 30 days of taking office – scrapping the net zero target, safeguard mechanism, vehicle emissions standards, nuclear prohibitions and four offshore wind zones – with Angus Taylor saying “Australia has done its bit” to drive down emissions.
  • Victoria will ban datacentres from residential zones and within 150 m of homes, schools and childcare centres, and require them to supply their own renewable energy and storage; critics point out that the rules aren’t retrospective, exempting all approved projects and the eight applications already before the planning minister.
  • With AEMO forecasting that datacentre electricity use could triple by 2030, the AEMC has opened consultation on two rule changes from Minister Bowen that would make datacentres and other large loads pay their share of the network upgrades they trigger, and stop the cost of stranded assets being passed to other consumers if projects fall through. Submissions close 5 November.
  • Treasury’s Intergenerational Report 2026 names the energy transition as one of five forces reshaping the economy over the next 40 years, projecting that household energy costs will fall around 40% between 2030 and 2050 as homes electrify, and that data centres will make up almost 10% of NEM demand by 2050.
  • Woodside and Burrup Peninsula Traditional Owners are locked in a $300 million compensation dispute over the 1998 land access agreement for the North West Shelf’s Karratha Gas Plant – the Ngarluma Yindjibarndi Foundation is seeking $390 million over 12 years against Woodside’s offer of $87 million.
  • Chris Bowen is travelling to India and Saudi Arabia to bolster fuel security, with plans to visit the world’s largest refinery at Jamnagar and meet Saudi Energy Minister Prince Abdulaziz bin Salman about the closure of the East-West pipeline, ahead of COP31.
  • Sunshine and wind met a record 80.4% of demand on the NEM on Saturday 19th September, with rooftop solar alone supplying more than half the grid’s power for 30 minutes around lunchtime.

News from Japan

Podcast of the week

Columbia Energy Exchange looks at the Iran war six months on. With crude near $107 a barrel, Hormuz tanker traffic reduced and Saudi Arabia’s East-West Pipeline offline, they warn that the market buffers that cushioned the early shock are running out.

Data, Dalby, Data

Highlights from the Australian market

  • Anthropic has signed a lease for Australia’s largest data centre, the $32 billion Western Downs Digital Park near Dalby in Queensland, which will power Claude AI inference and, once built, draw electricity equivalent to 1.5 million households.
  • Australia’s dependence on gas generation during the evening peak has fallen by almost 70% in the year to August 2026, with batteries now covering 49% of evening dispatchable power, up from just 0.4% in 2020.
  • In the same vein, new ANU modelling finds Australia doesn’t need more gas-fired generation to meet future energy needs, showing pumped hydro and batteries can balance a fully renewable grid at a comparable cost.
  • NSW’s renewable transmission delivery agency EnergyCo has underspent its budget by $939 million over the past two years, a symptom of approval delays that now leave the state roughly 7.9GW short of its 2030 renewable energy target.
  • ARENA has committed $8.2 million to a home electrification trial that aims to make the transition from gas to electricity easier, letting up to 1,000 Canberra households bundle solar, batteries and EVs onto one digital platform.
  • IEEFA and Green Energy Markets’ Australian Renewable Energy Scorecard finds Australia has enough wind and solar in the pipeline – 34GW of solar and 17GW of wind fully approved – to hit the 82% 2030 renewables target, but actual construction is falling far short.  

News from Japan

  • Chubu Electric Power has withdrawn its restart applications for Hamaoka Units 3 and 4 after an independent committee found staff had for years manipulated seismic safety data submitted to Japan’s nuclear regulator, leaving it unclear if or when the reactors will ever restart.

Podcast of the week

Zugzwang: Episode 3 – What is transmission really worth?

The latest episode of Zugzwang: The market modelling podcast is now available!

Jack Simpson, Oliver Nunn and Jabez Wilson discuss modelling philosophy and put it to work on one of the NEM’s most contested assets: transmission. Listen now on your favourite platform.

Spotify: https://open.spotify.com/show/0346ILtbXgKJJIlOy64p1i

Apple Podcasts: https://podcasts.apple.com/us/podcast/zugzwang/id6801348317

YouTube: https://www.youtube.com/playlist?list=PLQ3gvq2Ccils

Gas walk-back

Highlights from the Australian market

News from Japan

  • Australia’s ambassador to Japan, Andrew Shearer, used a Japan National Press Club address to call for deeper Australia-Japan energy cooperation, framing the push partly around concerns over China’s growing economic coercion in the region.
  • Paywalled: Chugoku Electric Power’s Shimane Nuclear Power Station Unit 3  – a 1.37GW reactor that began construction in 2006 but was halted after Fukushima in 2011 – is on track to clear safety inspections and become the first new nuclear unit to come online in Japan, with operation expected by FY2030.
  • Paywalled: Kawasaki Heavy Industries and Germany’s RWE are installing a 30 MW-class hydrogen mono-firing gas turbine in northern Germany, capable of running on 100% hydrogen or co-firing with LNG at various ratios, with the trial run set to begin within FY2026.

Podcast of the week

Catalyst with Shayle Kann asks whether data centers actually increase electricity prices; the answer is more nuanced than it first appears, with data centres able to lower local utility rates even as they contribute to rising grid costs elsewhere.

Smoke on the water

Highlights from the Australian market

  • A fire has completely destroyed Tungatinah Power Station in Tasmania’s Central Highlands; Hydro Tasmania and TasNetworks remain confident the wider grid remains secure with the gas-fired Tamar Valley Power Station coming online to cover the shortfall.
  • WA’s Economic Regulation Authority has fined state-owned Synergy $1.2 million after a trading software error let it inflate wholesale prices from its Kwinana battery, extracting an extra $850,000 and lifting overall wholesale costs by roughly $9.5 million over an eight-month period.
  • AEMO and SA Power Networks ran their annual rooftop-solar “fire drill for the grid,” remotely curtailing tens of thousands of South Australian solar systems for up to an hour to test the emergency backstop system.
  • The AER has released a preliminary position rejecting Transgrid’s bid to pass an extra $1.2 billion of Project EnergyConnect cost blowouts onto consumers.
  • Victoria has launched Australia’s first offshore wind auction, seeking 2GW of capacity in the Gippsland zone with bids closing in August 2027, as the state races to replace coal capacity ahead of Yallourn’s 2028 and Eraring’s 2029 closures.    

News from Japan

Podcast of the week

The latest episode of Zugzwang: The market modelling podcast is now available! In this episode Jack Simpson, Oliver Nunn and Endgame consultant, Harry McArthur break down our latest modelling on where data centres should be located – and what it means for prices, gas, and the coal fleet along the way. Listen now on your favourite platform.

Spotify: https://open.spotify.com/show/0346ILtbXgKJJIlOy64p1i 

Apple Podcasts: https://podcasts.apple.com/us/podcast/zugzwang/id6801348317 

YouTube: https://www.youtube.com/playlist?list=PLQ3gvq2Ccils

Scooby-dooby-ESOOoooo

Highlights from the Australian market

  • AEMO’s 2026 Electricity Statement of Opportunities shows an improved reliability outlook with gaps not emerging until 2030-31 in NSW and Victoria under the official standard; WattClarity questions whether that improvement is partly an artefact of a contested 2023 methodology change adding 6-12 month buffers before new projects count toward the forecast.
  • Chris Bowen has launched Capacity Investment Scheme Tender 11, seeking 1.8GW of wind and solar in WA to help replace coal plants closing by 2029. In spite of this, recent analysis from the ABC shows that only 4 of 31 Capacity Investment Scheme-backed wind projects reaching financial close as construction costs have risen 30-50% since bids were submitted.
  • The AER has released its Strategic Plan 2026-2030 with concrete commitments including implementing an effective domestic gas reservation scheme and driving more efficient utilisation of electricity distribution networks.
  • National cabinet has resolved that Queensland and the Northern Territory can power new data centres with coal and gas rather than exclusively new renewables, a carve-out from the Albanese Government’s original push for a uniform national standard, with federal legislation now not expected until 2027.
  • Victoria has opened its first offshore wind auction, seeking 2GW of capacity across Gippsland and Warrnambool zones (enough for 1.5 million homes), with bids closing August 2027, contracts awarded in 2028, and first power expected in 2035.
  • The Australian Renewable Energy Hub has shrunk from a planned 26GW to 15GW, with proponents InterContinental Energy and CWP Global dropping the hydrogen and ammonia export components entirely.
  • Oxford Economics forecasts Australian data centre electricity demand will more than triple from 5.1TWh in FY26 to 33.7TWh by FY36 under its central scenario, with NSW and Victoria accounting for over 85% of that load and data centres consuming up to 19% of those states’ grid-supplied electricity by then.

News from Japan

  • Paywalled: Kirin has begun producing green hydrogen on-site at one of its beer factories using a 280kW solar array, targeting 70-80 tonnes of hydrogen annually to cover up to 23% of the plant’s heating needs.
  • Paywalled: Japan’s grid operator OCCTO has proposed a new “Complementary Auction” within its Capacity Market, run alongside the existing Reserve Power auction, both effectively paying older thermal plants to stay online amid concerns that supply will remain tight through FY2030.

Podcast of the week

Catalyst with Shayle Kann talks to Voya Energy’s Richard Wang about replacing diesel backup generators with an electrochemical generator that produces electricity from aluminium pellets and air.

Contact

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Level 31, 9 Castlereagh St, Sydney NSW 2000

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