Abstract: Embodiments of the disclosure relate generally to methods and apparatuses for testing solar cells, and more particularly, to methods and apparatuses for field testing solar cells. The apparatus for testing solar photovoltaic modifies includes a plurality of individual light diffuser wave guides, coupling lenses coupled with the plurality of individual light diffuser wave guides, LED light simulator for providing light through the plurality of individual light diffuser wave guides, air guidance system for providing conditioned air from an air conditioning unit, an air diffuser for diffusing the conditioned air to a surface of the solar photovoltaic modules, and an electronic control circuit for controlling the apparatus.