[tulihauki]

In warmer climates, yes. Not in Finland, however. Here's a graph of power use and generation in 2015:

http://www.fingrid.fi/EN/ELECTRICITY-MARKET/LOAD-AND-GENERAT...

[aianus]

The way I read it, OP was claiming that in any given place electricity demand goes up precisely when solar generation goes down.

Which may be true in Finland but is false in general.