The main difference between the two technologies is the type of silicon solar cell they use: monocrystalline solar panels have solar cells made from a single silicon crystal.
In most cases, you shouldn't need to clean snow off your solar panels. Light can get through the panels when there's a light dusting of snow, and when the snow is heavier, the 45-degree angles of most equipment should facilitate the snow sliding right off.
Installing solar panels on a sloped roof enhances energy production efficiency. For example, roofs with a pitch of 30 to 45 degrees often perform well for solar harvesting.
The expansion of floating photovoltaics (solar panels on water, known as FPVs) could provide a source of low-conflict renewable energy while also sparing land. But there are still many unknowns.
What is good about it is that no water is collected at the frame bottom, even if the module is tilted at low angle. The flaw of such panels is their high weight and price.