Looks like 912 accumulators to 16 solar panels which is a 0 560 75 ratio.
Best solar panel setup factorio.
The optimal ratio is 0 84 thus a more ideal setup would be 21 accumulators to 25 solar panels.
This means one solar panel produces an average of 42 kw over one day and night cycle.
Or more precisely you need power consumption in w 30 kw solar panels.
Keep in mind that these numbers are approximate you may want to have a buffer for laser turrets if nothing else.
There are either 5 36 extra accumulators or 6 38 missing solar panels.
For each 5 solar panels you need 3 accumulators.
Generated power will increase decrease linearly during dusk and dawn and no power is produced at night.
The ideal ratio is 0 84 accumulators panel.
Here is a quite popular blueprintable design by madzuri.
You need 17 solar panels for each steam engine running at max capacity.
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.
Solar panels are an unlimited source of free energy that produce no pollution.
This layout has 170 accumulators and 196 panels.
Overall this design has a continuous power rating excluding roboport drain of 8 232mw.