Open source low-cost power monitoring system

Research output: Contribution to journalArticle


Research units

  • Michigan Technological University


This study presents an entirely open-source, low-cost power monitoring system capable of many types of measurements including both loads and supplies such as solar photovoltaic systems. In addition, the system can be fabricated using only open source software and hardware. The design revolves around the Digital Universal Energy Logger (DUEL) Node, which is responsible for reading and properly scaling the voltage and current of a particular load, and then serializing it via an on-board ATTiny85 chip. The configuration of the DUEL node allows for custom sensitivity ranges, and can handle up to 50 A and 300 V. Up to 127 DUEL nodes communicate via Inter-Integrated Circuit (I2C) on a bus, which can be monitored and logged through an Arduino UNO, or other compatible microcontroller. Using accessible equipment, the DUEL node can be calibrated to a desirable accuracy and error. The DUEL nodes are also completely customizable, making them fit for any input range, where all commercially-available products are fixed range. The open source solution out performs commercial solutions as the price per measurement ($18.25) is significantly smaller, while the number of serviceable channels (1 2 7) is significantly higher.


Original languageEnglish
Article numbere00044
Publication statusPublished - 1 Oct 2018
MoE publication typeA1 Journal article-refereed

    Research areas

  • Building energy, Building monitoring, Building systems, Circuit milling, Current, Data logger, Electrical engineering, Energy, Engineering, Green building, Home energy monitor, Open hardware, Photovoltaic, Power, Power monitoring, Renewable energy, System monitoring, Systems monitoring, Voltage

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