We are experiencing severe winter storm up in Edmonds/Seattle over past 6 days with more snow on the way. I have been unable to charge the PW2 batteries over past three days, with more than 1 foot of snow covering them with temperatures in teens to twentys, and with yet another dumping of snow scheduled this afternoon. I had my PW2 batteries lower limit set at 5 percent in self-powered mode, but they continue to draw down, and are currently showing only 2 percent remaining. I am worried the batteries will drain down to zero, and what that might do to them. Any thoughts. I will be contacting Tesla-Energy to register my concern but thought the PW2 community might have some feedback/thoughts. I sure wish I had a safe and expedient way of getting the snow off the panels, as we do have good sun right now. Thanks for any input.