Abstract: A system for measuring power quality on an electrical grid is disclosed. The system comprises a plurality of monitoring systems installed at a plurality of structures receiving power via the electrical grid, the structure being at the edge of the electrical grid and including, for example, houses and other buildings. Each monitoring system is configured to be electrically coupled to a panel assembly and an electric service meter at the structure at which it is installed. Each monitoring system also comprises a measurement unit configured to measure electrical values associated with the panel assembly at the structure and to detect power quality events based on the measured electrical values. The system further includes a reporting system communicatively coupled to the monitoring systems and configured to receive data representing the detected power quality events from the monitoring systems.