You can generally choose what kind of power generation mix you want from a utility. eg I am on a 100% renewable plan.
[1]https://www.energy.ca.gov/data-reports/energy-almanac/califo...
Yes, right this moment. You can see this here: https://www.caiso.com/todays-outlook/supply
> does decently well[1] on renewables
Technically it does decently well on combined "non greenhouse gas + renewables." This is a rather self serving categorization of generation sources and might not be what people buying "100% renewable" energy think they're actually getting.
In any case, subtracting Nuclear and Hydro, if more than half the kWh purchased in the state are purchased as "100% renewable", they cannot all be possibly served by renewables even in the aggregate.
The first is that at any given point in time, my instantaneous energy use is offset by renewables.
The second is that over some period of time (e.g., one month) my aggregate energy use is offset by renewables.
The second is MUCH easier. When people say things are 100% renewable, I generally think they mean the second thing. This is a bit of a fudge (not wrong but not 100% level).