Net metering meters for grid-tied solar in Canada
A net metering meter records electricity flowing both ways, from the grid into the home and from the solar system out to the grid. Utilities usually supply or approve the meter, and some also add a separate production meter, so the exact type depends on the utility and the programme.
What does a net metering meter measure?
An ordinary household meter was built to count energy in one direction. A solar home sends power back whenever the panels produce more than the house uses, so the meter must either count flow in both directions or keep two registers, one for imports and one for exports. Net metering depends on those readings, because the bill is built from them. The idea of crediting exports against use is explained in the net metering guide, and the Alberta net metering explainer shows one provincial version.
Which meter types do utilities use?
Terms vary, but three arrangements are common.
- Bidirectional meter. One meter records imports and exports, either as a net figure or as two separate readings. It is the usual choice for a simple net metering setup.
- Smart or interval meter. This meter records use in short intervals and sends the data to the utility. It supports time-based rates, and it can show when exports happened.
- Separate production meter. A second meter records everything the solar system generates before the home uses any of it. Some programmes use it to pay or credit generation separately.
Which of these your home gets is the utility's decision under its own rules, so ask them before ordering equipment.
Who supplies, installs and reads the meter?
In most cases the utility owns the revenue meter and reads it, and a meter change is arranged as part of the connection process. The solar installer coordinates the application and the electrician, but the utility does the swap or approves the equipment. Expect a possible fee or a wait for the meter appointment, and ask your utility for the current terms. Our solar panel installation process guide places the meter step in the timeline, and the Alberta permits guide covers the permit side.
Is your inverter display a substitute?
No. Inverters and monitoring apps report what the system produces, which is useful for tracking performance but is not the number used for billing. Small differences between the two are normal, because of losses and measurement methods. The solar monitoring guide explains how to use that data, and the inverter guide describes what these devices do. If the utility meter and your records disagree by a lot, ask the utility to check the meter.
Does a battery change the meter?
It can. A system with a battery may need extra metering or a different configuration, because power flows between the battery, the home and the grid. Rules for storage differ among utilities, and some require the battery to be disclosed in the application. Read the battery storage guide for the technical background, then ask the utility how it treats batteries before you buy one.
Quick answers
Do I need a new meter for solar panels?
A grid-tied system usually needs a meter that can record both imports and exports. The utility normally supplies or approves it as part of the connection.
What is a bidirectional meter?
It is a meter that measures electricity flowing in both directions, from the grid to the home and from the home to the grid.
Who pays for the net metering meter?
It depends on the utility and programme. Ask for the current fee schedule before signing a solar contract.
Can I use my inverter app for billing readings?
No. Monitoring data helps you track the system, but the utility bills from its own revenue meter.