Clearly the grid can handle the current demands but would overloaded at times by the scale of renewable supply.
Batteries strategically placed should fix that problem. The batteries can store the excess energy the grid can't handle and release it when it needs it. They will be needed anyway so it doesn't really matter. Some upgrades of the transmission lines may be needed but it's not a big deal.
They are of course economically viable, although you choose to believe otherwise and becoming more so as their price falls unlike coal and gas energy which continues to rise in price.
"it is moving so quickly on its new battery storage tender, which seeks to install at least two 20MW battery story installations, with a combined minimum of 100MWh of storage, in the west of the state.
More storage will likely be needed, and while some upgrades of transmission lines are likely, it is believed that the Victoria government will consider location and grid constraints when choosing and allocating wind and solar projects in that part of the state."
