NOVELTY - A modular concentrator (10) comprises specular reflectors (12a, 12b) with parabolic surfaces, which are symmetric with respect to optimal direction of reception of solar radiation; cells (15a, 15b), supported proximate to focal zones parabolic surfaces and facing them; open funnel-shaped cowlings (16a, 16b) on cells for reflecting light reflected by parabolic surfaces; and screens (17a, 17b) for protecting regions of modular concentrator peripheral to cells, which are adapted to screen regions from radiation reflected by parabolic surfaces outside cowlings.    USE - Modular concentrator for photovoltaic solar panels.    ADVANTAGE - The concentrator has simple structure that can be obtained with materials that are readily available and easy to work with. It is durable even if used in an incorrect manner; offers high angular acceptance while also making it possible to prevent losses through absorption and reflection owing to the use of refractive lenses. The concentrator can also be implemented at relatively low cost.    DETAILED DESCRIPTION - Modular concentrator (10) comprises specular reflectors (12a, 12b) with parabolic surfaces, which are symmetric with respect to optimal direction of reception of solar radiation; cells (15a, 15b), supported proximate to focal zones parabolic surfaces and facing them; open funnel-shaped cowlings (16a, 16b) on cells for reflecting light reflected by parabolic surfaces; and screens (17a, 17b) for protecting regions of modular concentrator peripheral to cells, which are adapted to screen regions from radiation reflected by parabolic surfaces outside cowlings. Screens extend peripherally to cowlings so as to cover regions. Projection of each one of cells occurs along optimal direction of reception, outside corresponding one of specular reflectors, that faces it.    DESCRIPTION OF DRAWING(S) - The drawing is a sectional view illustrating a modular concentrator.    Modular concentrator (10)    Specular reflectors (12a, 12b)    Cells (15a, 15b)    Funnel-shaped cowlings (16a, 16b)    Screens (17a, 17b)