I'm the case of this specific battery, it's been being built specifically because there's generally a surplus of cheap renewables in Victoria when the sun is shining. This energy can be sold back into the market during the evening at a much higher price, pushing out coal, gas and hydro generation.

It's also expecting to make a lot of revenue from frequency control which is a critical service in a grid relying more on renewables.

So yes this battery is going to be very effective at reducing carbon emissions in Victoria. As a similar battery did in South Australia.