The same as for the wood turbine.

It also matters before asking the question of batteries how much turbines it's going to take before the problem actually needs to be tackled

The problem doesn't arise immediately in the duck curve. It depends on how much of the energy mix of the place is composed of controllable sources alongside your wind and solar

I recall seeing that the need for batteries is tiny if you accept a 10% share of carbon emitting energy across the year - so all in all, another non-problem, or at least first you should focus on building the turbines to reach the problem, then think of whether or not it's worth getting batteries for the rest.