This paper does much of the modelling for that: https://www.cell.com/joule/fulltext/S2542-4351(19)30300-9 https://www.cell.com/joule/fulltext/S2542-4351(19)3030

This paper does much of the modelling for that: https://www.cell.com/joule/fulltext/S2542-4351(19)30300-9 https://www.cell.com/joule/fulltext/S2542-4351(19)30300-9 (although it's from 2019 so renewnables costs have dropped significantly). Basically if you have 5% of electricity generation from non-renewable sources (eg gas fired peaker plants) then electricity costs fall and you only need storage at $150/kWh (which is available now).