FRIDAY, JANUARY 15 AT 11:00AM EST. There is a vast and growing overproduction of electricity from solar and wind, but solar in particular, across the country, especially in the Southwest. Utilities are in a rush to find ways of saving this electricity and balancing their systems. Batteries and other storage systems are all on the table, along with what may have the most promise: green hydrogen. This is hydrogen made by electrolysis, using surplus electricity. The Europeans are ahead of us, but more and more U.S.