I put in a 16.5 kw solar system with Panasonic panels, about a year and a half ago. I put panels on my garage and pole barn roof. I live in Minnesota, so as you know, it does snow here on occasion. I do not have the ability to clean the snow off my pole barn panels as the barn is too tall. Also the pole barn roof has a 18 degree slope so the snow does not fall off the roof easily and can keep the panels covered for a long time. I can clean off my garage panels as the garage is lower in height. After my first year of solar, I saw right away that if I wanted a good winter output of solar power that I needed a new strategy for my 28 panels on my barn roof. I purchased a MT Solar 28 panel multi pole mount. The pole mount tilts. So the winter angle for my latitude is about 60 degrees, spring angle 40 degrees and summer angle 17 degrees. That extreme angle will make cleaning the snow off easily. Plus by being able to follow the sun angle, the panels put out a little more power than a roof mounted unmovable solar panel. Overtime, this slight increase in solar production will add up. There are cheaper tilt systems out there but, I felt this system was heavy duty and the tilting of the panels is very easy. My wife and I can tilt the panels very easily.