Australia’s largest integrated battery and solar farm is officially open.

A 50-megawatt battery system near the town of Kerang can store 100 per cent renewable energy and feed directly into the state's electricity grid.

Victoria's Energy Minister, Lily D'Ambrosio, said it is a big step towards a low-carbon future.

“It's producing clean, renewable energy from a really important natural resource that exists in north-western Victoria, and that is the sun,” Ms D'Ambrosio said.

The integrated system has actually been running since the end of last year, and Minister D'Ambrosio says it has already helped during recent heatwaves when older energy sources, like the Loy Yang power station in the Latrobe Valley, struggled.

“Everyone will remember that in January we had record extreme temperatures, especially in north-western Victoria where there were temperatures of 49 degrees,” she said.

“This battery was still producing and providing electricity during those really extreme heat temperatures.”

Edify Energy chief John Cole said the high-tech battery is unlike anything else in Victoria's energy network.

“The battery can be used to provide strengthening to the network when required, it can store power, and it responds to network issues in milliseconds rather than minutes,” he said.