[powerbroker]

Unfortunately it these batteries are unable to multiple gigawatts over many hours of excess wind energy. It will be at least a decade before the battery energy storage systems are close to big enough to absorb the oversupply of wind energy that happens a few times a week.

Don't get me wrong. The BESS helps with frequency, synchronization and voltage issues. They just do very little to flatten the wind spikes without turning off 10-20% of the wind fleet.

[konschubert]

It’s not necessary that the batteries absorb all the oversupply. Curtailment will always be part of an efficient renewables energy system.

The batteries are there to make sure that the prices don’t go crazy on the evening.