A system includes first and second photovoltaic modules, each of which includes a first side lap portion, a plurality of solar cells arranged in a plurality of rows, a first electrical connector on the first side lap portion and electrically connected to the first row of the solar cells, and a second electrical connector on the first side lap portion electrically connected to the second row of the solar cells. The system includes a first power electronics unit connected to the first and second electrical connectors of the first photovoltaic module; and a second power electronics unit connected to the first and second electrical connectors of the second photovoltaic module. The first power electronics unit is electrically connected to the second power electronics unit.