The ECOTHERM photovoltaic module EPVM-2128 is a striking innovation in the area of renewable energies. A novel frame structures means these devices can be installed without causing any damage to the roof covering. The supporting structure is enclosed on all sides and is aerodynamically tested. It is made from corrosion protected sheet steel and makes optimal use of the available roof surface. Separate modules can be readily connected up to each other by means of connecting lips attached to the base frame.