if you don't have batteries, you are covering only small part of 24h of your consumption. still reliant on grid.

also, panels take a lot of space, so overproduction takes space, costs money and ROI is smaller.

panels are cheap, but you need often permission to build more and of course inverter (you can't connect infinite amount of panels to an inverter) and then you don't even mine enough to buy energy for night for that money. if you had batteries, it would be better. 😀