Dual-Sided Solar Cells, Up To 50% Increase?

bSolar panels could change the renewable energy game.   First seen in a German trade show last month, then announced in a 730W project in Japan.  

In typical positions such as on a roof, the panels can yield anywhere from 10-30% depending on the reflectivity of the material under the panel, but in a vertical position, the panels could yield nearly 50% more energy.

Source: b-solar  boosts-energy-yield-nearly-50%