AGL sets new storage benchmark with 1,000MWh big battery in South Australia with 4 hours of storage.

AGL announced on Saturday that it is to build a massive 250MW big battery in South Australia, with four hours of storage, making it the longest duration big battery to be built in Australia.

Importantly, the 250MW, 1000MWh battery will be built at the site of the ageing Torrens Island gas generator, which is to due to close within a few years once a new transmission link in built from South Australia to NSW, and as more renewables and grid-scale batteries displace gas generation in the supply of bulk energy and key grid services.

The significance of this battery is the four hours of storage, the first in Australia, which suggests that AGL now sees batteries as competitive with gas generators to meet peak demand periods, and to operate primarily to shift the supply of wind and solar to when it is needed most.

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