A photovoltaic power system comprising: a plurality of photovoltaic concentrator modules arranged in a two dimensional array, wherein each photovoltaic concentrator module comprises a main body portion having: - a base and a plurality of side walls (138, 140, 142, 143) connected to the base, wherein the base and the plurality of side walls (138, 140, 142, 143) define an interior region of the main body portion, - two cavities (134, 136) formed in the main body portion each cavity extending from the same one of the side walls and the base into the interior region, - an attachment and pivot point in each cavity (134, 136), and - one or more apertures located opposite the base, each aperture comprising a plurality of lenses positioned in each aperture in a manner such that each lens is capable of directing incident light to a focus on a solar cell within the interior region of the main body portion; a first articulating mechanism including a first and a second chassis (305, 307) and a plurality of elongated members, each elongated member being coupled at one end to one of the first and the second chassis (305, 307) and at the other end to the attachment and pivot point in one of the cavities (134, 136) such that the first articulating mechanism can articulate the respective photovoltaic concentrator modules about first axes which are each substantially parallel to the longest dimension of a respective photovoltaic concentrator module, and a second articulating mechanism configured to articulate a subset of the plurality of photovoltaic concentrator modules about a common second axis that is substantially perpendicular to the first axes, wherein the second articulating mechanism comprises a mounting structure (310, 312) coupled to the first and second chassis (305, 307), to articulate the same in a swinging manner about the common second axis. a plurality of photovoltaic concentrator modules arranged in a two dimensional array, wherein each photovoltaic concentrator module comprises a main body portion having: - a base and a plurality of side walls (138, 140, 142, 143) connected to the base, wherein the base and the plurality of side walls (138, 140, 142, 143) define an interior region of the main body portion, - two cavities (134, 136) formed in the main body portion each cavity extending from the same one of the side walls and the base into the interior region, - an attachment and pivot point in each cavity (134, 136), and - one or more apertures located opposite the base, each aperture comprising a plurality of lenses positioned in each aperture in a manner such that each lens is capable of directing incident light to a focus on a solar cell within the interior region of the main body portion; - a base and a plurality of side walls (138, 140, 142, 143) connected to the base, wherein the base and the plurality of side walls (138, 140, 142, 143) define an interior region of the main body portion, - two cavities (134, 136) formed in the main body portion each cavity extending from the same one of the side walls and the base into the interior region, - an attachment and pivot point in each cavity (134, 136), and - one or more apertures located opposite the base, each aperture comprising a plurality of lenses positioned in each aperture in a manner such that each lens is capable of directing incident light to a focus on a solar cell within the interior region of the main body portion; a first articulating mechanism including a first and a second chassis (305, 307) and a plurality of elongated members, each elongated member being coupled at one end to one of the first and the second chassis (305, 307) and at the other end to the attachment and pivot point in one of the cavities (134, 136) such that the first articulating mechanism can articulate the respective photovoltaic concentrator modules about first axes which are each substantially parallel to the longest dimension of a respective photovoltaic concentrator module, and a second articulating mechanism configured to articulate a subset of the plurality of photovoltaic concentrator modules about a common second axis that is substantially perpendicular to the first axes, wherein the second articulating mechanism comprises a mounting structure (310, 312) coupled to the first and second chassis (305, 307), to articulate the same in a swinging manner about the common second axis.