A dual-stage cylindrical parabolic concentrator based solar concentrator and absorber system, the system comprising: a reflector subsystem with two parabolic mirrored reflectors (A, B), namely a larger primary reflector and a smaller secondary reflector, wherein apertures of the two reflectors (A, B) face each other, and wherein the two reflectors (A, B) are arranged in a way such that their focal point/line and axes coincide with each other to enable multiple reflections of sunlight hitting the primary reflector, between the primary reflector and the secondary reflector, each successive reflection resulting in the sunlight getting concentrated in a narrow region finally resulting in a highly coherent and intense sunlight in a narrow region around the coinciding focal points and the coinciding axes of the two reflectors (A, B); an absorber subsystem comprising a plurality of absorber tubes /cavities placed on a non-reflecting side (A') of the primary reflector either alone or in combination with a non-reflecting side (B') of the secondary reflector, wherein the tubes /cavities are configured to circulate a heat transfer fluid; and a thermal insulation subsystem preventing/minimizing thermal loss, said subsystem comprising at least one sheet or tube of single or evacuated double walled envelope made of glass enclosing at least one of the reflectors (A, B), to minimize thermal loss by convection, the envelope having an inner and an outer surface, wherein the envelope has a selective reflective coating for infrared rays on its inner surface to minimize thermal loss by infrared radiation from the reflective surface of the parabolic reflectors (A, B), and an anti-reflective coating on its outer surface to minimize reflection losses, wherein the parabolic mirrored reflectors (A, B) are of cylindrical shape generated by rotational translation of sections of the two parabolic reflectors (A, B) along a common line below the vertex and parallel to the directrix of the primary reflector, and wherein the system does not require a mechanism to follow sun's movement through the day, wherein the system comprises a mechanism to follow up the seasonal movement of the sun's path between solstices. a reflector subsystem with two parabolic mirrored reflectors (A, B), namely a larger primary reflector and a smaller secondary reflector, wherein apertures of the two reflectors (A, B) face each other, and wherein the two reflectors (A, B) are arranged in a way such that their focal point/line and axes coincide with each other to enable multiple reflections of sunlight hitting the primary reflector, between the primary reflector and the secondary reflector, each successive reflection resulting in the sunlight getting concentrated in a narrow region finally resulting in a highly coherent and intense sunlight in a narrow region around the coinciding focal points and the coinciding axes of the two reflectors (A, B); an absorber subsystem comprising a plurality of absorber tubes /cavities placed on a non-reflecting side (A') of the primary reflector either alone or in combination with a non-reflecting side (B') of the secondary reflector, wherein the tubes /cavities are configured to circulate a heat transfer fluid; and a thermal insulation subsystem preventing/minimizing thermal loss, said subsystem comprising at least one sheet or tube of single or evacuated double walled envelope made of glass enclosing at least one of the reflectors (A, B), to minimize thermal loss by convection, the envelope having an inner and an outer surface, wherein the envelope has a selective reflective coating for infrared rays on its inner surface to minimize thermal loss by infrared radiation from the reflective surface of the parabolic reflectors (A, B), and an anti-reflective coating on its outer surface to minimize reflection losses, wherein the parabolic mirrored reflectors (A, B) are of cylindrical shape generated by rotational translation of sections of the two parabolic reflectors (A, B) along a common line below the vertex and parallel to the directrix of the primary reflector, and wherein the system does not require a mechanism to follow sun's movement through the day, wherein the system comprises a mechanism to follow up the seasonal movement of the sun's path between solstices.