The Perlight delta 425W solar panels have 60% less lead compared to a half cell module along with 1.5% more surface area due to the busbar less technology used in each panel. The Perlight 425W has no visible white lines giving a hugely attractive all-black appearance that will look seamless on any domestic roof. The use of busbar-less technology has led to each solar panel having a market-leading efficiency of 21.4%. While the full parallel circuit design improves the performance of the panels when shaded when compared to conventional modules. Lower operating temperatures and high-pressure resistance reduce the risk of micro-cracks or hot spots appearing in the panel, improving performance and prolonging the life of your solar panels. Each panel is Fluorine-free with low Pb levels making them even more environmentally friendly. Fully MCS certified.