Australian wholesale electricity prices have plummeted by a substantial 47 per cent year-on-year in the second quarter of 2026, reaching their lowest June quarter average since 2020. The Australian Energy Market Operator (AEMO) confirmed this significant drop in its latest Quarterly Energy Dynamics report, released on 3 August 2026, highlighting the increasing impact of renewable energy and battery storage on the National Electricity Market (NEM).
The average wholesale price across the NEM, which covers Australia’s eastern states and South Australia, fell to AUD $74 per megawatt-hour (MWh) during the April to June 2026 period. This marks a substantial reduction and signals a potential easing of cost pressures that could eventually flow through to retail electricity bills for households and businesses.
“Record renewable generation, combined with growing battery storage and consumer energy resources, continues to reshape Australia’s energy markets,” stated Violette Mouchaileh, AEMO’s Executive General Manager Policy and Corporate Affair. “These technologies are changing demand patterns, supporting system reliability and increasing the amount of lower-cost energy available across the market.”
Renewables Drive Historic Price Reductions
The primary driver behind this dramatic price fall is the unprecedented surge in renewable energy generation and rapidly expanding battery storage capacity. Renewables supplied a record 42.1 per cent of electricity generation across the NEM during the June 2026 quarter, a notable increase from 37.1 per cent in the same period last year.
This growth was fuelled by:
- Wind generation: Rose 20 per cent year-on-year.
- Utility-scale solar: Increased by 12 per cent.
- Rooftop solar: Saw a 6.9 per cent rise in output.
Concurrently, coal-fired generation decreased by five per cent, while gas-fired generation dropped 30 per cent, reaching its lowest June quarter average since 2003. This shift away from more expensive thermal generation during key periods directly contributes to lower wholesale costs.
Battery Storage Doubles, Stabilising the Grid
Grid-scale battery capacity more than doubled over the past year, now exceeding 9 gigawatts (GW). This rapid deployment enables the storage of excess renewable energy during periods of high generation and its release during peak demand, effectively flattening price spikes. Household battery capacity also saw significant growth, increasing by 41 per cent annually, or 3283 megawatt-hours (MWh) during the quarter.
Increased battery deployment is not only reducing peak prices but also influencing overall market dynamics. AEMO’s report noted that battery storage set wholesale prices on more occasions than in the previous year, but at a significantly lower average price of AUD $107/MWh, a fraction of the AUD $452/MWh recorded in the same quarter last year. This demonstrates the growing influence of storage in providing lower-cost supply to the market. Households looking to maximise their savings can explore options to Maximise Your Home Battery Savings: Earn $1,000+ Annually with a VPP in 2026 or learn more about Is a Home Battery Retrofit Worth It in Australia 2026? Costs, Rebates & 3-4 Year Paybacks.
State-by-State Impact
The wholesale price reductions were not uniform across all NEM regions, but all states saw significant declines:
| State | Q2 2026 Average Price | Year-on-Year Change |
|---|---|---|
| Victoria | AUD $56/MWh | Down 60% |
| New South Wales | AUD $75/MWh | Down 53% |
| Queensland | AUD $67/MWh | Down 44% |
| Tasmania | AUD $86/MWh | Down 39% |
| South Australia | AUD $86/MWh | Down 38% |
Victoria recorded the largest decline, with average prices falling 60 per cent to AUD $56/MWh. New South Wales followed with a 53 per cent drop to AUD $75/MWh, and Queensland saw a 44 per cent reduction to AUD $67/MWh.
What This Means for Your Retail Bill
While wholesale prices directly impact energy retailers, the full extent of these savings for consumers often takes time to materialise in retail bills. The Australian Energy Regulator (AER) sets the Default Market Offer (DMO) annually, which acts as a safety net for customers on standing offers and a reference price for market offers. For the 2026-27 financial year, the AER had already announced DMO price reductions for most households and small businesses in New South Wales, South East Queensland, and a slight increase for South Australian residential flat-rate customers, effective from 1 July 2026.
These wholesale price trends reinforce the downward pressure on retail prices, particularly as retailers adjust their market offers. Consumers are encouraged to compare energy plans regularly to ensure they are on the most competitive offer. Tools like Energy Plans No Lock-In Contracts Australia 2026: Complete Guide can assist in navigating the market.
The increasing penetration of renewables and battery storage is fundamentally changing the economics of Australia’s energy grid, offering a pathway to more affordable and reliable electricity for consumers in the long term. Households with smart meters in DMO regions can also benefit from the new Solar Sharer Offer, which provides three hours of free electricity daily, encouraging a shift in energy use to capitalise on abundant daytime solar.