[skybrian]

This seems good for investors in utility-scale batteries, since they can charge them very cheaply and sell at night.

(Although, that might not work well in Finland in the summer.)

[adrianmonk]

You can view this as a natural or even beneficial feedback mechanism that keeps solar generation and battery storage on par with each other.

Too much solar leads to crashing prices which leads to more battery investment. Once the batteries are built, solar prices recover somewhat and solar investment starts to make sense again.

Ideally you wouldn't overshoot too much on the solar and have big price crashes. But if you do overshoot dramatically, the incentive to build batteries increases, so maybe you recover faster.