I think it's indeed a reference to wind and solar. There's a discussion of the problems posed by loss of system 'inertia' here: https://www.drax.com/technolog

I think it's indeed a reference to wind and solar. There's a discussion of the problems posed by loss of system 'inertia' here: https://www.drax.com/technology/shock-absorbers-keeping-grid-stable/ https://www.drax.com/technology/shock-absorbers-keeping-grid...