[nl]

It's not just insurance if power goes down. It'll knock the edges off the price-peaks, which SA suffers badly from.

Gas fired power stations don't fire up until they can get the maximum price possible, and often try to drive the price higher by stopping producing power. SA is very vulnerable to that because there is no backstop of coal prices. OTOH, the minimum price of wind power and solar is much lower.

These batteries will kill the peaking gas generator game.