How do Flat Plate Collectors (FPCs) compare to other types of solar collectors in terms of efficiency?

FPCs have relatively high efficiencies compared to other types of solar collectors, especially at low temperatures. They can achieve efficiencies of up to 70-80% at temperatures below 60°C, making them well-suited for applications such as solar water heating and building heating. However, their efficiency decreases at higher temperatures, making them less suitable for high-temperature applications.