In terms of resources due to the additional cost of adding a transformer to each array it is actually more efficient to use standard panels up until the player has enough panels.
Industrial craft low voltage solar panel.
The low voltage solar array is a block added by compactsolars that is an upgrade from the regular solar panel.
These constructions provide the benefit of compact and relatively cheap solar panel arrangements without energy losses.
This means that they cannot work during the night during rainstorms underground underwater in the nether or the end.
Due to the relative weakness of power generation solar panels are often assembled into so called solar flowers when using copper cable whereby as many solar panels as possible are connected to a batbox using cable lengths of four segments or less.
The low voltage solar panel is an upgraded version of the industrialcraft 2 solar panel added by industrialcraft 2 classic which produces 8 energy units per tick eu t instead of 1 eu t.
This ratio remains true with the higher tier solar arrays as well.
Low voltage solar array.
A medium voltage array outputs 64 eu per tick and a high voltage array outputs a whopping 512 eu but is composed of 512 standard panels.
It is a more efficient version of the solar panel producing 8 eu t instead of 1 eu t in the same amount of space.
It is still bound by the same placing restrictions working only in direct sunlight and generating far less eu in rain and thunderstorms.
The low voltage solar array will output 8 eu per tick with is the sum output of its component solar panels.