There are two primary sizes of solar panels.
Common size of residential solar panel.
39 x 77 3 25 feet x 6 42 feet these are the standard solar panel sizes for most residential and commercial installations give or take an inch on either side.
Length and width although length and width varies slightly most companies are manufacturing solar panels in standard sizes.
72 cell panels are 77 inches by 39 inches weigh roughly 50 pounds each and are more commonly used for commercial solar installations.
60 cell and 72 cell.
The smaller size is a better fit for.
60 cell panels measure 65 by 39 inches weigh roughly 40 pounds each and are the de facto standard for residential solar installations.
Small solar panels traditionally come in three common sizes.
Commercial buildings can typically fit larger sized panels that measure out to approximately 77 inches by 39 inches.
Yet you can also find panels of 150 160 or 175 watts.
As mentioned before each manufacturer has its own solar panel sizes and wattages sweet spot.
50 watt 100 watt and 160 watt.
Most residential installations use panels that are 65 inches by 39 inches as the smaller size is more ideal to maximize roof space.
There is some variation from brand to brand and if you re installing a large scale solar panel system such as for a warehouse or a municipal building your panels will be closer to 6 feet long.