I often point to this, but it's such a fun and useful site I'll do it again.
What you get is typically (it depends on where you are) producing steady output from solar + wind requires some hours of batteries (typically much less than a day) and usually a fairly large backup of hydrogen (particularly far from the equator). The hydrogen gets burned in combined cycle plants with a mediocre round trip efficiency; most of the stored energy goes through batteries and back again at high round trip efficiency.
So, yes, one does need days worth of storage, but it's not batteries, it's a rainy day hydrogen account where storage capacity is very cheap.
https://model.energy/
I often point to this, but it's such a fun and useful site I'll do it again.
What you get is typically (it depends on where you are) producing steady output from solar + wind requires some hours of batteries (typically much less than a day) and usually a fairly large backup of hydrogen (particularly far from the equator). The hydrogen gets burned in combined cycle plants with a mediocre round trip efficiency; most of the stored energy goes through batteries and back again at high round trip efficiency.
So, yes, one does need days worth of storage, but it's not batteries, it's a rainy day hydrogen account where storage capacity is very cheap.