Circuit Merging combines two or more 50A CT measurements from a single Vue into one virtual circuit reading in the app. Use it when a single appliance is monitored by multiple sensors (a 240V dryer with a sensor on each leg), when you want a custom subtotal (all kitchen circuits), or when you want a single notification threshold for a group of related circuits. This article covers when to use Circuit Merging, how to merge and unmerge, and the important limits to know.
When to Use Circuit Merging
Multi-pole circuits monitored with two sensors. Dryers, ranges, ovens, heat pumps, EV chargers, and similar 240V loads. Merging two sensor readings into one combined total is more accurate than using a single sensor with a 2.0× multiplier — especially for loads that may be unbalanced between legs (see Sensor Installation).
Solar and battery circuits. When solar or battery is monitored on multiple legs, merging shows accurate net production or charging totals. Bi-Directional settings on the underlying circuits are respected by the merged total.
Sub-panel monitoring without a multiplier. If you've used multiple 50A CTs to capture a sub-panel feed, merging gives an accurate measured total without applying a multiplier.
Grouping related circuits. Combine all kitchen appliance circuits, all lighting circuits, or any other custom grouping into a single subtotal for easier tracking.
How to Merge Circuits
Open the Emporia Energy app and tap the Menu (☰).
Tap Manage Devices and select your Vue.
Tap Merge Circuits near the top of the settings list.
Select the circuits you want to combine (minimum of two).
Tap Save, give the new merged circuit a descriptive name, then confirm with Merge Circuits.
The merged circuit appears as a virtual entry in the circuit list (with a high port number, since it's not tied to a physical sensor). The individual circuits are hidden from the main views — they still exist in the data, just consolidated under the merged total.
How to Unmerge Circuits
Open the Emporia Energy app and tap the Menu (☰).
Tap Manage Devices and select your Vue.
Tap Merge Circuits.
Select the merged circuit you want to break apart.
Tap Merged Circuits, then Unmerge Circuits at the bottom.
Confirm with Unmerge Circuits.
The individual circuits return to the main circuit list with their full history preserved. Notifications that were attached to the merged circuit are deleted on unmerge and will need to be recreated on the individual circuits if you want them back.
Editing a Merged Circuit
You can edit a merged circuit's Name and Circuit Type from its Settings page like any other circuit. Bi-Directional and notification settings work on the merged total just as they do on a regular circuit.
To rename, re-classify, or recalibrate the underlying individual circuits, you must unmerge first. Once you've made the changes on the individual circuits, you can re-merge them into a new merged grouping.
Important Notes and Limits
Supported on all Vue generations. Circuit Merging works on Vue Gen 1, Gen 2, and Gen 3. It requires Emporia Energy app version 3.4.4 or later. If you don't see the Merge Circuits option, check the App Store or Google Play for an update.
50A CTs only. Merging is for branch-circuit (50A) sensors. The 200A main CTs are not eligible.
Same device only. All circuits in a merged grouping must come from the same Vue. To combine readings across multiple Vues, see Combined Vues vs. Nesting: Which Feature to Use.
One group per circuit. Each 50A CT can belong to only one merged circuit at a time.
Mixed Bi-Directional settings are supported. A merged group can include both consumption and generation circuits (e.g., solar + battery), and the totals account for sign correctly.
Active reporting required. Circuits must be actively reporting data to be selectable for merging.
Notifications. Notifications attached to circuits before merging are disabled when those circuits are merged but can be re-enabled. Notifications on the merged circuit itself are deleted permanently when you unmerge.
Related
Sensor Installation — multi-pole circuit options including the two-sensor + Circuit Merging approach.
Combined Vues vs. Nesting: Which Feature to Use — if you need to combine readings across multiple Vue devices rather than within one.
Feedback and Suggestions
This knowledge base is continuously updated to provide the most helpful guidance for Emporia customers. If you found this article unclear or have suggestions for improvement, please contact our Customer Support team.