You don't ever get a few inches of snow on the top of the roof. The point of the aggressive pitch is so the weight of the snow pulls itself off the roof so your roof/home doesn't have to support 5 tons of water weight.
IDK if you live in a place that sees significant snow, if so, just drive around a neighborhood and notice what the snow looks like on the rooftops. Generally none on the top and some on the bottom. That's by design.
While the bottom of the panels aren't doing anything to melt the snow, the top portions are, and that accelerates as the snow melts.
>You don't ever get a few inches of snow on the top of the roof. The point of the aggressive pitch is so the weight of the snow pulls itself off the roof so your roof/home doesn't have to support 5 tons of water weight.
This is definitely not how snow on roofs work. Here is an example with a roof with lots of snow on it:
Roofs in cold climates are designed to hold the weight of snow on top of them.
ETA:
The no snow on top but some on the bottom is because their attic isn't insulated well enough. Ideally you lose no heat through the ceiling into the attic. But without enough insulation you will lose a significant amount and the hotter air will rise to the highest point and melt the peak first. You don't want this because the melted snow can run down your roof and freeze again on the colder parts.
It's a low pitch roof which allows for a lot more buildup.
Also, if you read the article I linked, you'll know that pitch isn't perfect (pun intended), but it does go a long way in preventing snow buildup. A major snow storm with wind blowing snow in the right direction can twart a high pitched roof. But that sort of condition is a lot more rare.
IDK if you live in a place that sees significant snow, if so, just drive around a neighborhood and notice what the snow looks like on the rooftops. Generally none on the top and some on the bottom. That's by design.
While the bottom of the panels aren't doing anything to melt the snow, the top portions are, and that accelerates as the snow melts.