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Refoss
Refoss EM16P 16-channel smart energy monitor
Energy / power meter

Refoss EM16P

Refoss · EM16P

The Refoss EM16P is a smart energy monitor designed to deliver highly detailed electrical consumption tracking across 16 independent channels. Thanks to its current clamp sensors, it lets you monitor multiple circuits individually from a single device, making it an ideal solution for advanced homes, small businesses, three-phase systems, and solar power installations. One of its standout features is support for open protocols such as MQTT, HTTP JSON-RPC 2.0, and WebSocket, enabling fully local integration with Home Assistant without relying on cloud services. The device includes a local web interface, historical data storage, solar monitoring, and support for Zero Feed-In configurations designed to maximize self-consumption from solar power. With its 16-channel architecture, it becomes possible to monitor virtually every important circuit in an electrical panel from a single unit. The EM16P is clearly aimed at advanced users looking for a professional energy monitoring solution with a high level of integration and control.

WiFiWiFi 2.4 GHzBluetooth

Pros

  • 16 independent channels
  • Compatible with Home Assistant
  • Native MQTT support
  • Documented open API
  • Built-in local web interface
  • Solar monitoring
  • Compatible with three-phase systems
  • Zero Feed-In support
  • Detailed energy history
  • High measurement accuracy
  • Ideal for circuit-by-circuit monitoring

Cons

  • Requires installation inside an electrical panel
  • Needs a neutral wire to operate
  • Not compatible with Matter
  • No built-in display
  • Installation recommended by a qualified electrician
  • More complex to set up than basic meters

Compatibility

Home AssistantMQTT

Specifications

ModelEM16P
Typesmart energy monitor
Channels16 independent
Maximum current120A per channel
Accuracy±1%
ConnectivityWiFi 2.4 GHz and Bluetooth
ProtocolsHTTP JSON-RPC 2.0, MQTT and WebSocket
Local web interfaceyes
Home Assistant compatibilityyes
Solar monitoringyes
Zero Feed-Inyes
MountingDIN rail
Power supply110-240V AC
Available datavoltage, current, active power, energy and power factor
Supported installationssingle-phase and three-phase
Power supplyCorriente eléctrica
Neutral wire requiredYes