If you ever have to move the panels, vertical mount bi facial, 40 snowfalls, never cleaned snow, coming up on my annual panel cleaning this month. I get the highest pv in winter, 465w makes 569w. My pv2 2790w would get a minimum of 460w in that weather and 780w when it stopped snowing, with snow and sun 3400w. Numbers are good and no more panel cleaning.
If you ever have to move the panels, vertical mount bi facial, 40 snowfalls, never cleaned snow, coming up on my annual panel cleaning this month. I get the highest pv in winter, 465w makes 569w. My pv2 2790w would get a minimum of 460w in that weather and 780w when it stopped snowing, with snow and sun 3400w. Numbers are good and no more panel cleaning.
A leaf/snow blower might clean up the remainder. If desired.