We proposed a low-profile static low-concentration optics design paradigm for building-integrated photovoltaics or as alternative of flat PV panels. Based on the measurement results of our prototype, this design could reach more than 80% on-axis optical efficiency and more than 60% collection efficiency over an annual solar insulation, with a concentration of around 3x. The result is approaching the analytical maximum of non-tracking concentrator derived in previous study.

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