Electrical Power Consumption Sub-Metering and Monitoring Using Arduino-Raspberry Pi via Non-Invasive Wattmeter Sensor

The energy crisis, brought by rise in fuel prices and increasing electricity demand due to commercialization, increasing population, and rise in number of building structures and houses, has brought to the demand requirements for smart and green buildings. For this purpose, a real-time energy monitoring system is essential in profiling and forecasting the building energy consumption and operational behaviors and factors affecting such. This information is useful to accurately understand and calculate the power consumption based on instantaneous operations of utilities and air-conditioning units, lighting, and other appliances. This paper presents a non-invasive approach of measuring, monitoring, and logging electrical power consumption in a building. The installed monitoring sensors had an average current reading difference of 5.11% when compared to commercially available clamp meters. The variance in their readings is attributed to the sensitivity of the current sensor, and the density of wiring connections in a panel box, which causes interference due to their induced electromagnetic flux.