# Bidirectional active-energy meter

Canonical URL: https://eloragrid.ai/symbols/bidirectional-active-energy-meter
Publisher: Elora Grid
Updated: 2026-10-28
Lookup label: kWh
Drawing use: SLD, Schematic
Reference families: IEC, Manufacturer

Energy meter with separate registers for energy flowing in each direction, as used at generation and solar connection points.

## In plain English

### What does Bidirectional active-energy meter mean?

A bidirectional meter records active energy in both directions on separate registers, usually labelled import and export. It is the normal meter at connection points with generation, batteries or solar, where energy flows to and from the network at different times of day.

### A simple example

Arrows on the symbol show the two directions, but what counts as import depends on where the meter sits and on the CT polarity. A reversed CT swaps the registers without any visible fault, so the direction convention must be checked against commissioning results.

### What the drawings help you do

Confirm which register is import and which is export. Check CT polarity against the stated direction. A bidirectional meter keeps separate import and export registers; a net register only keeps the difference.

### This particular reference

Energy meter with separate registers for energy flowing in each direction, as used at generation and solar connection points. A bidirectional meter keeps separate import and export registers; a net register only keeps the difference.

### Terms

- Terminal: An identified point where a conductor connects.
- Schematic: A drawing showing function and connections rather than physical appearance.

Concept diagram: Identify the device and form → Read the connections and state → Check the equipment reference
A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.

- [Power and energy measurement quantities](https://www.se.com/ph/en/faqs/FA343278/)
- [PowerLogic ION9000 user manual](https://www.se.com/us/en/download/document/26719674/)


## What it represents

A bidirectional meter records active energy in both directions on separate registers, usually labelled import and export. It is the normal meter at connection points with generation, batteries or solar, where energy flows to and from the network at different times of day.
Arrows on the symbol show the two directions, but what counts as import depends on where the meter sits and on the CT polarity. A reversed CT swaps the registers without any visible fault, so the direction convention must be checked against commissioning results.

## How to read it

- Confirm which register is import and which is export.
- Check CT polarity against the stated direction.

## Information to show or reference

- Define import direction
- Show CT polarity
- Reference metering point

## Important distinction

A bidirectional meter keeps separate import and export registers; a net register only keeps the difference.

## Facts

- Registers: Import and export active energy
- Typical use: Generation, storage and solar connection points
- Preview: Independent educational concept; consult the applicable standard and project legend for the exact graphic

## Public references

- [Power and energy measurement quantities](https://www.se.com/ph/en/faqs/FA343278/) — Schneider Electric. Public explanation of energy and power measurement quantities used by meters.
- [PowerLogic ION9000 user manual](https://www.se.com/us/en/download/document/26719674/) — Schneider Electric. Public meter manual describing measurement, logging and recording features of a revenue and power-quality meter.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.