Canadian Solar, founded in 2001 and headquartered in Guelph, Ontario, is one of the few solar manufacturers with significant North American production capacity. Canadian Solar's CS3W-440P leverages Monocrystalline technology to achieve 20.56% module efficiency and 440W maximum power. Key specs: Voc=48.7V, Isc=11.4A, Vmp=40.3V, Imp=10.92A. Warranty: 25 years.