REC Solar 470 Watt ALPHA PURE RX 30mm All Black Solar PanelREC Solar 470 Watt ALPHA PURE RX 30mm All Black Solar Panel The REC Solar 470 Watt ALPHA PURE RX 30mm All Black Solar Panel by REC Solar is a powerful residential solar panel that hits the sweet spot between high power and practical handling, in an elegant full black design. The REC Alpha Pure RX boasts an impressive power density of 226 W m2, with 22. 6% panel efficiency. The panel offers a 20 year product warranty and a 25 year performance warranty,