One of the things to watch out for when looking at renewable energy prices is that it can often reflect the value of that energy, rather than production cost.

The price being very low often reflects the fact that, at that time, this energy is basically worthless/useless. And in fact, prices have even gone negative, meaning "please stop feeding this useless energy into the grid".

So low renewable prices are not necessarily a good sign, and can in fact just be the economic indicator for the limited usefulness of renewable energy.