Ключевые слова: alternative, blue, building, cell, clean, cold, collector, cover, day, ecological, ecology, economy concept, efficiency, electrical, electricity, energy, environment, environmental, future, house, ice, installation, light, modern, module, panel, panels, photovoltaic, photovoltaic system, power, problem, production of energy, protection, renewable, renewable energy, roof, sky, snow, snowcovered, solar, solar panel, sun, sun trail, sunlight, system, technology, temperature, weather, white, winter,