A photovoltaic array includes a plurality of elongated rails and
rectangular photovoltaic modules. Each rail can have an extruded resin
construction and can include a lower base and an upper cap that cooperate
to define a pair of grooves that open in opposite directions from each
other. The elongated rails can be mounted on a support surface and extend
in a spaced and parallel relationship with each other. During mounting,
edges of the photovoltaic modules can be received by the grooves. In this
way, the photovoltaic modules can be mounted above the support surface in
a spaced relationship from the support surface.