OpenEnergyMonitor devices

OpenEnergyMonitor provides open-source hardware and software for electricity, solar, storage, heat-pump, and environmental monitoring, including emonPi, emonTx, emonVs, emonCMS, and related sensors.

Energy Meter Official site available

View devices Official website

Catalog devices

OpenEnergyMonitor products in the EnergyMeterHub catalog

Energy Meter Single-phase and 3-phase 4-wire monitoring; 3-wire 3-phase is not supported by the reviewed shop configuration note.

OpenEnergyMonitor emonPi3 6-Channel Energy Monitor

An open-source, local-data-friendly 6-channel CT energy monitor with integrated Raspberry Pi and emonCMS for households and advanced users who want flexible monitoring across consumption, solar, EV charging, batteries, and heat pumps.

Ethernet / Wi-Fi / MQTT / emonCMS / 433.92 MHz OpenEnergyMonitor radio Wall-mounted CT energy monitor with integrated Raspberry Pi, emonVs voltage sensor / power input, and optional CT sensors selected for each circuit. Home Assistant Local API

Brand overview

About OpenEnergyMonitor

OpenEnergyMonitor is a UK-based open-source energy monitoring project and shop. Its hardware and software stack is built around local data logging, emonCMS dashboards, MQTT, and expandable CT-based monitoring for homes, solar systems, heat pumps, EV charging, and light commercial installations.

For EnergyMeterHub device records, OpenEnergyMonitor products should be treated as local-data-friendly monitoring hardware. When a page represents an all-in-one emonPi product, use the device's own CT inputs, emonVs voltage-sensing requirement, emonCMS role, and official shop configuration options rather than borrowing values from older emonPi or emonTx generations.

OpenEnergyMonitor products in the EnergyMeterHub catalog

OpenEnergyMonitor emonPi3 6-Channel Energy Monitor

About OpenEnergyMonitor

Missing a device?