Device overview

The Carlo Gavazzi EM111DINAV81XS1PFB is a one-module DIN-rail energy analyzer for single-phase, two-wire 230 V circuits. This exact variant combines MID certification, bidirectional consumption and generation metering, and an RS-485 Modbus RTU port. It suits projects that need a compact panel meter and local data access rather than a vendor cloud or consumer app.

Core characteristics

The meter records active and reactive energy as well as current, voltage, active and reactive power, power factor, frequency, demand, and peak demand. The PFB measurement option preserves separate imported and exported energy registers, making this model relevant to solar import/export monitoring and other bidirectional metering jobs.

Active energy is Class 1 under EN 62053-21 and MID Class B under EN 50470-3. Reactive energy is Class 2 under EN 62053-23. MID applies to the supported fiscal active-energy register for this exact PF variant; buyers should confirm the certification and sealing requirements for their jurisdiction and intended billing or cost-allocation use.

Installation and current range

EM111 is intended for indoor DIN-rail installation by a qualified electrician. The AV8 version is a direct-connected meter: it does not use an external current transformer. Carlo Gavazzi describes normal direct-connected applications up to 32 A and specifies 5(45) A with 45 A maximum continuous current. Use above 32 A requires a 6 mm² conductor and must comply with local regulations and installation conditions.

The enclosure occupies one DIN module. The front is rated IP51 while the screw-terminal area is IP20, so it belongs inside a suitable electrical cabinet rather than exposed outdoors.

Compatibility and local access

This SKU exposes measured data and configuration over local RS-485 Modbus RTU. Supported baud rates range from 9.6 to 115.2 kbaud, and the device address is configurable from 1 to 247. No Carlo Gavazzi cloud service is required.

Home Assistant can poll the meter through its standard Modbus integration when the installation provides a compatible USB-to-RS-485 adapter or an RS-485 gateway and the required registers are mapped manually. This is protocol-level compatibility, not a dedicated plug-and-play Carlo Gavazzi integration.

Solar and monitoring use

Because the PFB variant distinguishes imported and exported active energy, it can support solar production and grid-flow monitoring when wired and configured correctly. This describes measurement capability only: the meter does not control an inverter, perform export limiting, or replace the control meter required by a specific inverter vendor.

Best-fit scenarios

  • MID-aware single-phase sub-metering and cost allocation
  • Solar import/export measurement with local Modbus collection
  • Building management, SCADA, PLC, and energy-management systems
  • Home Assistant installations comfortable with manual Modbus configuration
  • Tight switchboards where a one-module meter is valuable

Advantages and limitations

The strongest points are the compact enclosure, direct wiring, formal accuracy classes, bidirectional registers, and cloud-free Modbus access. It is less suitable for DIY retrofit users who want clamp installation, Wi-Fi, a bundled mobile app, or native automatic Home Assistant discovery. Professional electrical installation and separate RS-485 interface hardware are required.

Purchase and official sources

Carlo Gavazzi provides the exact product page, current EM111 data sheet, installation manual, communication protocol, official product image, and localized sales or purchase routes. Public price and guaranteed stock were not available in the reviewed global route, so buyers should confirm regional certification, supply, price, tax, and lead time with the local Carlo Gavazzi channel.