One of the interesting things about wind and solar is that they can output less than the potential production at will. So if you have a regular peak demand of

One of the interesting things about wind and solar is that they can output less than the potential production at will. So if you have a regular peak demand of 10GW, you provision for 12Gw of predicted continuous production, then simply turn off the portion of production that is not required. This is not possible with steam or gas turbines because they have a huge lead and lag time to cope with while wind and solar are for all intents and purposes instantly switchable. No storage required. One use for storage storage is when 1kWh of storage becomes cheaper than an extra kW of production required to meet that 1hr peak. Since wind power is around 7¢/kWh at the moment, there is not much chance of this happening any time soon. A more likely use for storage is to remove dependency on fragile interconnects. Remote towns can use batteries today to help insulate the residents from temorary loss of power due to ice, wind, fire, etc damaging transmission lines and equipment.