No bifacial, just single mono half cut cells. The winter tilt angle does help capture some of the snow reflected light.
Windshield factor is also known as wind chill factor.
Usually can get to over 60% or more with good sun. I see I was close to 20% this morning. If the wife is home and runs the dishwasher, does 3 loads of laundry plus runs the dryer, it won't get that high.
Sky is clear today, I'll report later on production.
Once you build up battery bank size it makes life so much easier. I'm at 58Kwh now. Probably add another 14Kwh before next winter.
They probably are drinking plenty of antifreeze.