In a recent study, researchers from the European Environmental Bureau (EEB), the Stockholm School of Economics (SSE), and the Potsdam Institute for Climate Impact Research (PIK) questioned the planned development of new nuclear capacities in the energy strategies of the United States and certain European countries.
In that case it’s the batteries being loaded and unloaded, not the renewables.
Storage can be connected to the grid anywhere and charged whenever power is cheap - from whatever sources are generating at that time. It is effectively an independent investment - assuming your on-grid / grid scale.
As far as i know the only major renewable electricity generation that is intrinsically linked to storage is reservoir based hydro with reverse pumping capability though even that increases costs and is a quite situation dependent if you want a lot of peaking power…
Nuclear fanboys could equally argue to add batteries so as to convert baseload into shape, or peaking.