Solar panel manufacturing is easy and most companies charge the extra for a solar panel because of how much work goes into making the panel itself. The solar cells are bought individually and then solderd together in an array. Then placed in a case and clear covering. Then you buy them or you could make your own. There are thousands of solar panel videos out there. All you need is a little time, space and motivation to get the job done.
A solar panel is just a set number of photo voltaic cells strung together that will produce an electric current for you in the form of direct current. They are cheap if you build it on your own and they can look very professional if you choose to make it professional looking. Or if you choose to buy one then the power output is all you need to be concerned about.
SOLAR HOW TO
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BUILD YOUR OWN SOLAR PANEL a step by step video series to build your own solar panel and solar electric system.