Since then, the efficiency of PV cells has steadily increased. In the 1970s, the efficiency rate improved to around 10%, and by the late 1990s, the best commercial cells were achieving efficiencies of over 15%. The ongoing pursuit of higher efficiencies has led to the emergence of various types of solar cells, including monocrystalline, polycrystalline, and thin-film technologies. Each type has its own advantages and applications, allowing for a wider range of implementations in residential, commercial, and utility-scale solar projects.
Lastly, while standard dimensions provide a useful guideline, the needs of each installation can vary significantly based on factors such as local regulations, roof size, and specific energy requirements. Therefore, it’s advisable for prospective solar panel users to consult with a professional installer who can provide tailored advice on panel selection and installation methods.