Just wanted to clarify, are all these panels equal in size? Is there a "standard" solar panel format? It would be easy to otherwise get a much cheaper panel providing the same output if it was just a bit larger. It might be fine for ground installations but in your case space is at a premium
there used to be a standard size, but as i understand it, the price pressure the article is about has induced some makers to introduce larger-sized panels. somewhat surprisingly, lower-efficiency panels (such as polycrystalline types) don't cost much less per square meter, and so they seem to be gradually disappearing from the market
