Abstract: A frame is provided, for applying potting material to a printed circuit board (PCB). The frame includes a plurality of substantially vertically oriented walls arranged to isolate a surface of the PCB into a plurality of zones. This allows the frame to be aligned over the surface of the PCB to isolate the surface of the PCB into a plurality of zones, each zone comprising at least one PCB component; and allows the potting material to be applied into the zones to achieve coverage of the PCB components in that zone.

Abstract: A string level rapid shut down device, and a method of controlling such a string-level rapid shutdown device in a photovoltaic (PV) solar system comprising one or more strings of PV panels is provided. The method includes, while the rapid shutdown device is on, opening a pair of power switches used by the rapid shutdown device to connect the PV solar panels to an input of an inverter through a DC disconnect switch on an output side. The method also includes determining a rate of voltage decay on the output side while the power switches are open; and controlling the power switches according to the rate of voltage decay.