NOVELTY - An electrical output derivation system comprises an array of solar radiation responsive cells having an outwardly disposed primary concentrator configured as a thin polymeric shell retaining a liquid defining an imaging lens, a secondary concentrator configured as a thin polymeric shell retaining a liquid with a receiving portion inwardly tapering to effect a non-imagining internal reflection of received solar radiation deriving homogenized solar radiation of uniform intensity, and a multifunction photovoltaic cell having a receiving side for photovoltaic interaction with the solar radiation.    USE - For deriving an electrical output from radiation of the sun used in supplementing the power grids in existence, providing direct current input to industrial facilities, e.g. bauxite smelters, and generating inexpensive hydrogen.    ADVANTAGE - The electrical output derivation is achievable at cost levels generally below those associated with conventional fossil fuel-based generation systems. No expensive, necessarily rigid and tolerance mandating large sun tracking parabolic mirrors are involved with the panel-based system.    DETAILED DESCRIPTION - An electrical output derivation system for deriving an electrical output from radiation of the sun comprises:    (1) an array of solar radiation responsive cells each disposed about a cell axis and having an outwardly disposed primary concentrator configured as a thin polymeric shell retaining a liquid defining an imaging lens performing in conjunction with adjacent primary concentrators to derive a field of view effective to track the solar radiation and effect an imaging along a concentration light path toward an image plane, a secondary concentrator configured as a thin polymeric shell retaining a liquid with a receiving portion located to receive solar radiation from the image plane and inwardly tapering to effect a non-imagining internal reflection of received solar radiation deriving homogenized solar radiation of generally uniform intensity, and a multifunction photovoltaic cell having a receiving side located for photovoltaic interaction with the homogenized solar radiation and in heat transfer relationship with the liquid and responsive to radiation impinging upon the receiving side to derive a cell electrical output; and    (2) a cell array network coupled with each the cell electrical output and having array electrical output(s).    DESCRIPTION OF DRAWING(S) - The figure is an enlarged partial view of a portion of the panel.    Cell (20)    Panel outputs (32)    Flange (36)    Frame (62)    Sealing flange (64)