Solar panel(s) must be located in an open area clear of obstructions and shading for the entire day. Snow, heavy fog or heavy rain affect solar panel performance and charge rate. Solar panels should be cleaned regularly to ensure proper operation. LiftMaster Gate Operators utilizing the solar option in cold weather climates where temperatures reach below -32°F (0°C) for more than 2 consecutive weeks require 33Ah batteries in lieu of standard 7Ah batteries. This is due to the effect of cold weather on batteries and a reduced number of hours of sunlight during the winter months.