Lead acids have very poor cycle life compared to lithium ion, unless you only use a small amount of their capacity such that the usable cost per kWh between the two are nearly the same.... but lithium ion prices have continued to reduce such that the usable price per kWh for lithium ion is now lower.
Additionally, the round trip efficiency of lithium ion batteries is higher than lead acid. Plus, the added weight of lead acid further increases installation costs. So when all is said and done, lithium ion is now superior to lead acid for grid storage.
Exceptions exist when the simplicity of managing a lead acid battery comes into play. Lithium ion batteries need to be babied. Lead acid can be just thrown onto a DC power bus.
Additionally, the round trip efficiency of lithium ion batteries is higher than lead acid. Plus, the added weight of lead acid further increases installation costs. So when all is said and done, lithium ion is now superior to lead acid for grid storage.
Exceptions exist when the simplicity of managing a lead acid battery comes into play. Lithium ion batteries need to be babied. Lead acid can be just thrown onto a DC power bus.