Queensland's wholesale power price fell 40% in a year - the state generator credits the battery build-out
CleanCo's FY26 annual report: Queensland average wholesale electricity fell to AU$65.47/MWh from AU$109.54/MWh. The state-owned generator points at a rush of utility-scale batteries, plus good wind and solar weather and steadier thermal plant. Evening peaks were softer. CleanCo still posted a loss.
If you buy power for a Queensland site, the number that moves first in the wholesale market is not the number on your retail invoice - but it still shapes what your retailer can offer next year.
Energy-Storage.News (1 Oct 2026) reports CleanCo Queensland's FY26 annual report, tabled in the Queensland parliament in late September. Average wholesale electricity in Queensland fell to AU$65.47 per megawatt-hour for the year ended 30 June 2026, down from AU$109.54 per megawatt-hour the year before - a 40% drop. CleanCo says the fall came from a significant influx of utility-scale batteries during the year, favourable conditions for wind and solar, and improved reliability of thermal generation. Evening peak prices were significantly lower, and price volatility stayed limited even in higher-demand periods.
CleanCo's own 250 MW / 500 MWh Swanbank Battery - Swanbank F - opened in February 2026 on the old Swanbank coal site near Ipswich. Tesla Megapacks; about AU$330 million from the Queensland Renewable Energy and Hydrogen Jobs Fund; Yurika on infrastructure and install. The report says the battery generated 43.2 GWh in the year at an 8.7% capacity factor while commissioning finished; operational control moved to CleanCo in April 2026, with full commissioning described as completed the following month.
Analogy: think of a town that suddenly has many more cold rooms for leftover midday produce. When everyone can store lunch for dinner, the evening auction for fresh crates gets quieter - and the merchant who used to sell expensive evening crates feels it first.
Good: a published wholesale average (AU$65.47/MWh vs AU$109.54), a published percentage drop (40%), a published link from the state generator to the battery build-out, and a published evening-peak claim. A buyer can point at the market move without pretending the AU$/MWh figure is their site bill.
Bad: wholesale is not your retail tariff. We will not invent the cents-per-kilowatt-hour on a warehouse invoice, a feed-in rate, or a payback from this report. CleanCo is a government-owned generator with offtakes and its own plant - not your electrician.
Ugly: cheaper wholesale hurt CleanCo's bottom line. The company swung from an AU$17.8 million profit in FY25 to an AU$22.9 million loss in FY26, even as gross margin and portfolio generation rose. The same report says CleanCo dropped several storage and renewable plans - including a sodium-sulfur battery at Swanbank and Moah Creek Wind - and that Mount Rawdon pumped hydro was not prioritised for further state investment after a QIC assessment. Batteries can flatten peaks and still leave a generator's profit ugly. We will not invent a retail saving for your site from either fact.
Soft next step: if your Queensland brief asks what a battery-heavy wholesale year means for a workplace solar-plus-storage plan, start with when the site uses power in the evening - then a short consult at Sovryn Energy /consult if you want that shape checked against your meter.
Source: Energy-Storage.News, 1 Oct 2026 - Queensland records 40% wholesale price drop due to BESS boom. Restated AU$65.47 vs AU$109.54/MWh, Swanbank F 250 MW/500 MWh, CleanCo profit-to-loss, and shelved projects as published. No retail tariff or site payback on this page.