Optical concentrator for four-terminal bifacial photovoltaic module

The present description concerns a photovoltaic module (1) and the method for installing the same. The photovoltaic module (1) comprises a light trapping optical concentrator (2). A first dichroic mirror (41) covers the bottom surface (22) of the concentrator (2), and is configured to transmit light in a first band, and to reflect light in a second band. A first photovoltaic cell (31) covers the first dichroic mirror (41) and is configured to generate electric power by conversion of light in the first band. A second photovoltaic cell (32) covers the rear surface (23) of the concentrator (2), preferably with a second dichroic mirror (42), and is configured to generate electric power by conversion of light in the second band. Characteristic of the photovoltaic module (1) is a wedge angle α selected for light in the second band to be guided by total internal reflection with a low concentrating ratio on the second photovoltaic cell (32) without the need of tilt sun tracking.