Batteries exist (and are getting better). Most of the intermittent nature of renewables is just solving for the timing issue (e.g. evening when demand is high a

Batteries exist (and are getting better). Most of the intermittent nature of renewables is just solving for the timing issue (e.g. evening when demand is high and the sun goes down), so short term storage is what's most in demand. Longer term storage is harder (e.g. it's cloudy for days on end), but even then there are renewable storage options like pumped hydro and generation of natural gas from electricity.