The Capacity Factor (essentially a plant's uptime) is important to consider, but isn't 100% for the other plant types either, though. Nuclear has 93% in the US,

The Capacity Factor (essentially a plant's uptime) is important to consider, but isn't 100% for the other plant types either, though. Nuclear has 93% in the US, coal has 54%, and Solar PV 26%[0]. The 22% quoted by hokkos is probably specifically for PV plants in Australia. [0] https://en.wikipedia.org/wiki/Capacity_factor https://en.wikipedia.org/wiki/Capacity_factor