tbh i just skip solar panels. it's such a grind. by the time i can make them at scale, i need so many of them, and i hate placing them. even with pretty OP construction bots it's not worth the effort IMO.
this might be mitigated if you tile something that can self expand, but even then you'll have to AFK or just have this going on for hours while you don't have access to the power you're trying to generated.
i end up scaling coal as far as i can and then rushing nuclear. nuclear is also a grind but at least you have to place them less frequently.