There were pilot plants on Shetland decades ago using excess turbine output to produce hydrogen .... not sure what (if anything) came of it ... on one my US road trips I stopped by a huge solar farm in New Mexico ... chatted to a couple of guys cleaning the panels (the new 'painting the Forth Bridge' I guess 🙂) who said excess output was turned to hydrogen on site then used to power jet turbine generators during the evenings to stretch their input to the grid beyong the 'sunny bit' ... makes far more sense than batteries to me.
K
