Lightsource bp breaks ground on Queensland hybrid to feed Rio Tinto's Gladstone smelters

Lightsource bp breaks ground on Queensland hybrid to feed Rio Tinto's Gladstone smelters Construction start on the 380 MWdc Lower Wonga project ties solar-plus-storage directly to one of Australia's biggest industrial loads, with Rio Tinto taking 40% of output. Lightsource bp began construction of the Lower Wonga hybrid project near Gympie in Queensland on Friday (2026-06-05), pairing 380 megawatts of solar with a 281 MW and 843 megawatt-hour battery in what the developer calls one of the largest solar-battery hybrids in the country. The head of Lightsource bp in Australia framed the start as a "new phase" for the global power sector.⁴ That matters because the project is not chasing the wholesale market. Rio Tinto, which is spending $7.2 billion shifting its Gladstone aluminium operations from coal to green power, has contracted to take 40 per cent of Lower Wonga's output. The interesting shift here is the buyer: a heavy industrial load locking in firmed renewable supply directly, rather than a utility balancing a portfolio.⁴ Gladstone is among Australia's largest single energy consumers, and Rio Tinto is spreading its bets across several developments at once. Alongside Lower Wonga, it has signed offtake deals with the neighbouring Smoky Creek and Guthrie's Gap solar-battery hybrids, plus two projects yet to break ground: the 1.4 GW Bungaban wind project, which includes battery storage, and a separate 1.1 GW development. The portfolio is being assembled to replace coal-fired baseload at scale.⁴ Smoky Creek and Guthrie's Gap are the anchor of that supply. Edify Energy reached financial close on the two Queensland projects in late May (2026-05-20 and 2026-05-21), a combined 600 MW (720 MWdc) of solar and 2,400 MWh of battery storage, which Edify describes as the largest solar and battery hybrids currently under construction in the country.^2,3⁴ Lightsource bp is building elsewhere too. Its Goulburn River project near Merriwa in New South Wales pairs a 49 MW, 562 MWh long-duration DC-coupled battery with a 585 MWdc solar farm, one of the firm's first hybrids of this design. The DC-coupling matters for cost and for how much solar energy can be captured rather than clipped.⁴ The logic behind all of this is straightforward. Solar provides the lowest-cost scalable electricity, and battery storage shifts that energy into periods of higher demand, which strengthens flexibility and reliability across the grid. Bolted onto a smelter that runs around the clock, the storage is what makes the offtake credible.⁴ But credibility on paper is not the same as delivery. BloombergNEF warned in May (2026-05-19) that even as developers rush to bring battery projects online and demand stays strong, high battery pack prices, global shipping bottlenecks and other supply-chain constraints are dampening near-term deployments. That is the gap between announced megawatt-hours and energised ones.¹ The risk is concrete, not abstract. BNEF pointed to Vistra restructuring its 350 MW/1,400 MWh Moss Landing Phase III project with PG&E because of battery supply uncertainty, a reminder that financial close and even construction starts do not guarantee on-schedule storage. For a buyer like Rio Tinto stitching together five projects to retire coal, slippage on any one shifts the whole transition timetable.¹ There is a coal read-through, though it should be held loosely. Every gigawatt-hour that firmed solar feeds into Gladstone is a gigawatt-hour that coal-fired generation does not, which over time trims thermal coal demand into one of Australia's industrial heartlands. The signal direction points bearish for Newcastle coal, but the volumes are years out and the consensus in the data here is thin.⁴ What to watch is conversion. Two of Rio Tinto's contracted projects, the Bungaban wind development and the 1.1 GW project, have offtake but no construction start; whether those move from signed deals to ground-breaking will show how much of this pipeline is real versus optioned.⁴ The other thing to track is the batteries themselves. Lower Wonga, Smoky Creek and Guthrie's Gap together represent more than 3,200 MWh of storage entering construction in a single Queensland cluster, into the same supply chain BNEF flagged as stretched. Energised capacity, not announced capacity, is the number that will tell you whether the Gladstone transition is on schedule.^4,1