Solar panels are best if "your roof is unobstructed by trees or other structures and south-facing with a slope between 15 to 40 degrees," said Nerdwallet. The size and age of your roof.

Sun Age, an Italian mounting system supplier, has developed a special bracket for rooftop PV installations on sloped tile rooftops ... high-power solar panels. “The larger is the panel ...

you'll likely end up with more panels, and vice versa. The size of the system will also depend on the roof itself. Solar ...