Electricity Prices

Queensland has moved through May as one of the most strongly solar-influenced markets in the NEM, with conditions continuing to reinforce a clear structural split between low-cost daytime energy and increasingly volatile evening peak pricing.

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While overall demand has remained relatively stable, pricing outcomes are becoming increasingly driven by the interaction between solar output, coal-fired generation availability, and transmission constraints during peak periods.

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What has become more evident through May is that Queensland is no longer simply a “solar-supported market”, it is now operating as a two-speed pricing system, where cost outcomes are heavily dependent on operational timing and exposure to evening dispatch conditions.

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As winter approaches and daylight hours shorten further, the transition between daytime solar supply and evening thermal generation is becoming sharper, increasing volatility concentration into a smaller portion of the day.

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Daytime Solar Continues to Drive Low Pricing

Midday pricing has remained consistently low throughout May due to very high levels of rooftop and utility-scale solar generation across the state. However, the structure of these low-price periods is gradually becoming more compressed compared to peak summer conditions.

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Key dynamics include:

• Strong and predictable low-price intervals during peak solar production (late morning to early afternoon)

• Narrowing duration of the effective low-cost window as solar output tapers earlier in the afternoon

• High correlation between solar generation and wholesale price suppression across central and regional Queensland

• Increasing importance of operational timing precision as pricing spreads widen between midday and evening periods

• More variability in shoulder periods due to cloud cover, changing demand conditions, and interconnector flow volatility

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From a commercial perspective, Queensland continues to reward businesses that can actively align consumption with solar production, particularly for flexible operational processes such as refrigeration cycling, HVAC pre-cooling, pumping, and production scheduling.

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However, the key shift through May is that passive daytime consumption is no longer enough to consistently capture the full benefit of solar-driven pricing — timing precision is becoming increasingly important.

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Evening Peaks & Generation Sensitivity

Queensland remains heavily dependent on coal-fired generation during evening peak periods, making the system structurally sensitive to generator availability, outage risk, and ramping performance.

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May conditions have highlighted further tightening of the evening peak structure, particularly as solar exits the system earlier and coal units are required to ramp more aggressively to meet demand.

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Key factors include:

• Increased reliance on dispatchable coal generation from approximately 4pm onward

• Heightened sensitivity to unplanned coal outages at major baseload stations

• Reduced system flexibility during rapid late-afternoon demand ramps

• Greater exposure to transmission congestion limiting intra-state energy flows during peak conditions

• Increasing reliance on firming generation and gas support during higher-stress evening periods

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These dynamics are contributing to:

• Sharper and more frequent evening price spikes, even during moderate demand conditions

• Increased volatility concentration between 5pm–9pm, where system stress is now heavily focused

• Short-duration extreme pricing events when multiple generators or network constraints occur simultaneously

• Greater pricing sensitivity to even relatively small changes in generation availability or interconnector flows

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From a risk perspective, Queensland is increasingly defined by peak concentration risk rather than total demand growth. In practice, this means a relatively small portion of the day is driving a disproportionate share of total energy cost exposure.

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Futures Pricing Outlook

Forward pricing has stabilised overall through May following earlier declines, although underlying structural risk remains elevated due to ongoing supply-side uncertainty.

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The market is increasingly balancing strong daytime renewable conditions against tightening evening supply dynamics heading into winter.

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Key drivers include:

• Ongoing coal unit maintenance schedules and outage risk

• Export-linked fuel pricing dynamics influencing marginal generation costs

• Seasonal demand shifts as evening heating load begins increasing

• Growing reliance on firming generation during constrained periods

• Retailer caution around future volatility exposure during winter peak conditions

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Retailers are also becoming increasingly selective in contracting activity, particularly for customers with:

• High evening peak exposure

• Limited operational flexibility

• Poorly profiled or uncertain interval load data

• Significant seasonal load concentration

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From a procurement perspective, Queensland is increasingly being priced on risk profile rather than total consumption volume alone, with evening peak exposure becoming a central factor in contract pricing outcomes.

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what it means for your business

Queensland remains one of the more structurally balanced markets in the NEM, but it is also one where pricing risk is becoming increasingly concentrated into specific time periods.

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The key takeaway across May is clear:

• Daytime energy remains structurally low-cost due to strong solar generation

• Evening pricing remains structurally exposed due to reliance on thermal generation

• Overall energy costs are increasingly determined by when electricity is used, not simply how much is consumed

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For businesses, this creates a significant opportunity. Operations that can shift, reduce, or better manage consumption during the 4pm–9pm period are increasingly able to improve energy cost outcomes without reducing overall demand.

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Businesses that actively review load profiles, tariff exposure, and procurement structures ahead of winter will be better positioned to manage volatility and secure more competitive pricing outcomes.

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If your business does not yet have a strategy in place, we can help. Contact us for a free bill check or to discuss a tailored energy procurement plan.