The ideal ratio is 0 84 accumulators panel.
Best solar panel setup factorio.
This layout has 170 accumulators and 196 panels.
Keep in mind that these numbers are approximate you may want to have a buffer for laser turrets if nothing else.
As for which to actually pick i d say it s up to your preference cilya s design with accumulators instead of a roboport is the only one with perfect 0 86 ratio among popular designs used by factorio players.
Or more precisely you need power consumption in w 30 kw solar panels.
Solar panels are an unlimited source of free energy that produce no pollution.
There are either 5 36 extra accumulators or 6 38 missing solar panels.
During daylight hours every panel provides the maximum power level 60kw.
The optimal ratio is 0 84 thus a more ideal setup would be 21 accumulators to 25 solar panels.
You need 17 solar panels for each steam engine running at max capacity.
For each 5 solar panels you need 3 accumulators.
Overall this design has a continuous power rating excluding roboport drain of 8 232mw.
Generated power will increase decrease linearly during dusk and dawn and no power is produced at night.
You can always sacrifice a bit of the optimal ratio for a cleaner design but you should stay in the area of 0 8 0 9.
Looks like 912 accumulators to 16 solar panels which is a 0 560 75 ratio.