But nuclear power is also not predictable, as plants regularly experience unexpected downtime. No power source is fully predictable, which is why you need contr

But nuclear power is also not predictable, as plants regularly experience unexpected downtime. No power source is fully predictable, which is why you need controllable power sources to make up the difference. I would say solar’s problem is controllability. You can only turn it up to the limit of the amount of sun received, which is none at night, and sometimes very little in the day. It remains to be seen how controllable fusion power will be. Will it be for base load only, or will it also be useful to flexibly dial up and down for variable load? Much of current nuclear power is base load only. Clean base load power is still super useful, but it is not a complete solution.