Solar-X BP Solar BP 340J, Solarex MSX40 Bolt In Replacement Solar Panel 40W - Manufactured Bolt in Replacement for BP Solar BPSX340J & BPSX340U. Pmax=40, Vmp=17.2, Imp=2.32. Outside Dimentions: 25.78 In Long x 21.14 In Wide Rugged Industrial Construction. 36 High Efficiency Polycrystalline Cells.