No solar light will work if covered in snow or ice. Solar lighting best surroundings are in a place where it gets at least 4 hours of sunlight. The recommended operating temperature range for most NiCd batteries is -4F to 140F for discharging, 32F to 113F for charging, and -22F to 122F for storage.
Taking care of your solar lights during the off season will allow you to use them again once the snow is gone and the warm weather returns. Spring will arrive and once again you will be able to put them outdoors again. If an exacting accord worked well the previous season, you may want to diagram where each piece was before pulling them up. From time to time a new arrangement may work out better. That is the beauty of solar lights. You can progress them around to wherever suits the mood.
