The TSM-470DEG15VC.20(II) DUOMAX Twin from Trina Solar is a bifacial, dual-glass module made of monocrystalline PERC third-cut cells in a silver frame with a clear/white grid backsheet. This module provides a maximum 470 watts and boasts 20.0% efficiency from the front side of the module under standard testing conditions, with up to an additional 25% gain from the rear side of the module. The TSM-470DEG15VC.20(II) is backed by a 12-year product warranty and 30-year linear performance warranty.