The baseload[1] (also base load) on a grid is the minimum level of demand on an electrical grid over a span of time, for example, one week.
A renewable system has to meet this minimum demand too, otherwise the lights go out.> The rest is just math related to how much energy generation and battery capacity you need.
I'm very pro-renewable, but aware of how difficult this is going to be. These are massive social and engineering tasks. For example, to look at the numbers in the UK, we're talking about construction of big new hydroelectric storage stations, or millions of batteries (potentially as EVs). [2]
The need for renewables to provide baseload power demand depends on big infrastructure development. Germany hasn't kept pace with this need, relying on French nuclear instead, which is why I said their Energiewende hasn't always been practical.
[1] https://en.m.wikipedia.org/wiki/Base_load [2] https://www.withouthotair.com/c26/page_189.shtml
I thought you were exaggerating until I read the sibling comments (thankfully on the bottom).
I'll leave it to them to figure out how serve the maximum demand with the minimum number.
Wind power is rarely zero; certainly not everywhere. Solar of course is but at a rather predictable schedule, which is why it is often combined with battery and wind. If you can have extra energy generation, you can charge some batteries. The rest is just math related to how much energy generation and battery capacity you need.