Enclosures having reconfigurable compartments for routing wiring used to monitor photovoltaic system output are described. In an example, an enclosure includes a housing around a circuitry bay and a wiring bay, and the wiring bay contains movable shrouds and/or partitions to divide the wiring bay into several reconfigurable wiring compartments. High-voltage wiring and low-voltage wiring may be routed through the wiring compartments, and the shrouds and/or partitions may physically and electrically isolate the high-voltage wiring from the low-voltage wiring. A tray disposed in the circuitry bay and include antenna mounts that extend into the wiring bay to isolate antennas mounted on the antenna mounts from electromagnetic interference from electronic components within the circuitry bay.