Image Credit: WaterNSW, Image used for illustrative purpose only.
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Australian water storage facility may turn into 1 GW pumped hydro station

Zen Energy has secured approval from Australia’s WaterNSW to investigate how to transform Sydney’s biggest water storage facility into a 1 GW pumped hydro project capable of supplying on-demand power for up to eight hours.

Zen Energy, an Adelaide-based renewable energy gen-tailer, wants to turn a disused coal washery site at Nattai, in the Australian state of New South Wales, into a clean energy powerhouse, delivering on-demand electricity to help stabilize the electricity grid as it transitions to renewable energy generation.

Zen Energy said its proposed Western Sydney Pumped Hydro project would be capable of providing critical backup for renewable energy sources, generating 1 GW of on-demand power for up to eight hours – enough to power the equivalent of 500,000 homes and businesses.

Zen Energy said that if all approvals and a social licence are secured, construction could begin at the site, about two hours southwest of Sydney, in 2027, with the asset to be operational by 2031.

“The vast water reserves of Lake Burragorang can supply Sydneysiders with clean drinking water and clean, renewable energy as well,” said Zen Energy Chief Executive Officer Anthony Garnaut. “Large-scale energy storage projects like Western Sydney Pumped Hydro are key to keeping the lights on and energy prices in check in [New South Wales] as our coal-fired power stations age and retire over the next decade.”

The pumped hydro project marks Zen Energy’s entry into renewable energy development in New South Wales and the company said it will now move forward with community consultations and site assessments. Initial studies have established that the project would have no detrimental impact on water quality at Lake Burragorang and the Warragamba Dam, which is 24 kilometers upstream.

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