The EcoFlow Single-Phase Smart Meter (model EFA-ADL200N-CT) is a DIN-rail mounted energy meter used to add accurate, real-time power monitoring to a compatible EcoFlow home energy system. It measures grid import and export using an external 120A current transformer (CT), giving the inverter the live consumption data it needs to manage battery charging, discharging and self-consumption automatically.
This particular variant is MID (Measuring Instruments Directive) approved and is supplied specifically for installations on the Octopus Energy Tenant Power tariff. It is a bi-directional single-phase meter with RS485 (Modbus-RTU) communication, allowing it to report live voltage, current, active power and energy data back to the connected EcoFlow inverter.
1-Phase
Bi-Directional Metering
Important Safety Information: This meter is MID approved specifically for the Octopus Energy Tenant Power tariff and is paired with pre-set parameters for that use case before dispatch. It is not intended for general-purpose installations — a system cannot be commissioned with this meter unless it is being installed for the Octopus Tenant Power tariff. For any other application, use the standard EcoFlow single-phase smart meter instead.
Key Features
External 120A CT Measurement
Uses a clamp-on 120A current transformer supplied with the meter, allowing installation without breaking into the main current-carrying conductors directly at the meter body.
MID Approved Accuracy
Certified to the Measuring Instruments Directive (MID) with a Class 1.0 accuracy rating, suitable for tariff billing and export verification purposes.
Bi-Directional Energy Metering
Measures both imported and exported energy independently, giving the connected EcoFlow inverter the data it needs for accurate self-consumption optimisation.
RS485 Modbus-RTU Communication
Communicates with the EcoFlow hybrid inverter via RS485 (Modbus-RTU), enabling real-time power sampling for smart charge/discharge control.
Compact DIN Rail Design
Mounts to a standard 35mm DIN rail inside the consumer unit or distribution board, keeping the installation neat and space-efficient.
Pre-Configured for Octopus Tenant Power
Supplied with parameters pre-set for the Octopus Tenant Power tariff, simplifying commissioning for this specific use case.
Technical Specifications
General
Product Type
Single-Phase External CT Smart Meter
Tariff Compatibility
Octopus Energy Tenant Power only (pre-configured)
Electrical
Phase
Single-phase, 2-wire
Rated Voltage
AC 110–240V (direct connection)
Current Measurement
External CT, 120A / 40mA rated
Measurement Type
Bi-directional active energy, power, current, voltage
Communication & Installation
Communication Protocol
RS485 (Modbus-RTU)
Dimensions (W×D×H)
Approx. 18 × 90 × 65 mm (meter body)
Compatible Systems
EcoFlow PowerOcean and OCEAN 2 single-phase hybrid inverter systems
Please Note: An additional external CT meter of this type is typically required where a third-party string inverter is already installed alongside the EcoFlow system, so that the EcoFlow inverter can correctly measure whole-home import and export.
Frequently Asked Questions
Can I use this meter on any EcoFlow installation?
No. This specific meter is MID approved and pre-configured exclusively for the Octopus Energy Tenant Power tariff. It cannot be used to commission a system on any other tariff or installation type.
What does the 120A CT measure?
The 120A current transformer (CT) clamps around the main current-carrying conductor to measure current without requiring the conductor to be broken or wired directly through the meter body.
How does the meter communicate with my EcoFlow inverter?
It uses RS485 (Modbus-RTU) communication, allowing the connected EcoFlow hybrid inverter to receive live voltage, current and power data for accurate energy management.
Is this meter suitable for tariff billing purposes?
Yes, it carries MID (Measuring Instruments Directive) approval with a Class 1.0 accuracy rating, which is the standard required for metering used in tariff-related billing and verification.
Where is this meter installed?
It mounts to a standard 35mm DIN rail within the consumer unit or distribution board, alongside the other electrical protection devices for the installation.
