Work with america s most trusted diy solar brand for do it yourself solar power. These solar panels are high efficiency 12 volt solar panels featuring sturdy aluminum frames and high transparency tempered glass tops. The panasonic n series of panels are a good quality solar panel with a top efficiency on their 330 watt monocrystalline system of 19 7 and a very impressive temperature coefficient of 0 29 a figure which is equal best with the market leader sunpower.