CertainTeed Corp.’s Apollo II solar roofing system has been upgraded to 60-watt monocrystalline integrated photovoltaic panels. The lightweight, durable panels are resistant to wind uplift and can be integrated into an existing roof of asphalt shingles or flat concrete tiles. Each 12-pound module features 14 high-efficiency monocrystalline silicon solar cells. Its low-profile design does not require structural reinforcement or evaluation. The product also features an open space under the modules to allow for easy electrical wiring. Water channels and raised fastener locations further improve waterproofing of the roof system.