The ideal ratio is 0 84 accumulators panel.
Best solar panel setup factorio.
The optimal ratio is 0 84 thus a more ideal setup would be 21 accumulators to 25 solar panels.
Though in all honesty you probably aren t ready for solar panels yet if the cost bothers you.
During daylight hours every panel provides the maximum power level 60kw.
This layout has 170 accumulators and 196 panels.
Looks like 912 accumulators to 16 solar panels which is a 0 560 75 ratio.
There are either 5 36 extra accumulators or 6 38 missing solar panels.
Keep in mind that these numbers are approximate you may want to have a buffer for laser turrets if nothing else.
For each 5 solar panels you need 3 accumulators.
Here is a quite popular blueprintable design by madzuri.
Solar panels are an unlimited source of free energy that produce no pollution.
You need 17 solar panels for each steam engine running at max capacity.
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.
Overall this design has a continuous power rating excluding roboport drain of 8 232mw.
This means one solar panel produces an average of 42 kw over one day and night cycle.