Well, like I said, 30 cents per kWh gives you a huge budget. If you can add one hour of capacity per year, and the battery facilities last 30 years... seems affordable.

Also wind does not stop overnight. You don't need to supply all the power.

I was assuming 100% solar, but sure you could go for wind. There is the general game of how much overcapacity you are willing to build -> in traditional grids your generation is slightly exceeding you peak needs. However, in renewable grid you probably should build significantly more (>>2X) than your peak needs, and minimise your need for battery storage.

That gives funny dynamics, where for some days electricity prices could be 0 or even negative.

>and the battery facilities last 30 years

Try 10 to 15 years. And we've never even attempted to hold energy for days or weeks at a time in these large scale deployments.

> And we've never even attempted to hold energy for days or weeks at a time in these large scale deployments.

Wouldn't that greatly reduce the wear rate?