Device profile · Specifications & compatibility
Shelly EM Gen3
Shelly · Energy Monitors · Model S3EM-002CXCEU
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- Shelly EM Gen3 lists Home Assistant; 2.4 GHz Wi-Fi; Bluetooth.
- Check the exact integration and firmware.
- A catalog integration label does not establish local control, official support or available entities.
Browse more from Shelly or explore all energy monitors in our catalog.
- Recorded year
- 2024
- Recorded warranty
- 3 years
- Dimensions
- 37 x 42 x 16 mm
- Weight
- 23g
The details that shape your choice
Shelly EM Gen3 Quick Features
Start with these specifications, then check the full details and conditions below.
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From specification to decision
Shelly EM Gen3: Capabilities And Limitations
Based on listed specifications, not hands-on testing. Manufacturer sources are linked where checked.
What it offers
A Home Assistant integration is listed, providing an integration path to verify for the exact model. Check the exact integration and firmware. A catalog integration label does not establish local control, official support or available entities.
View Home Assistant details →
What to consider
Matter is listed as unsupported; check another documented integration if Matter is essential to your setup.
View Matter details →Apple Home support is listed as unavailable; do not assume the device appears directly in Apple Home.
View Apple Home details →
Still needs verification
Confirm these details if they matter to your setup.
Questions About Shelly EM Gen3
Does Shelly EM Gen3 support three-phase support?
No, according to the listed specifications. Verify the installation, sensor arrangement and regional electrical requirements with the manufacturer.
View Three Phase specifications →Does Shelly EM Gen3 support split-phase support?
No, according to the listed specifications. Check the supported electrical system and required installation procedure. Single-phase device with two current channels
View Split Phase specifications →Does Shelly EM Gen3 support Matter?
No, according to the listed specifications. Verify the exact device type, firmware and features exposed in your chosen platform. Matter support is not proof of feature parity.
View Matter specifications →Does Shelly EM Gen3 work with Home Assistant?
Yes, according to the listed specifications. Check the exact integration and firmware. A catalog integration label does not establish local control, official support or available entities.
View Home Assistant specifications →Does Shelly EM Gen3 work with Apple Home?
No, according to the listed specifications. Check the model, firmware, exposed controls and any additional hardware requirements.
View Apple Home specifications →Explore the full picture
Shelly EM Gen3 Specifications
Recorded catalog values. Expand notes for qualifications; unknown values are not treated as missing features.
0 of 39 fields matched to manufacturer documentation. Source checks apply only to the named model and stated scope. Other fields remain catalog data. How we verify specifications →
Metering9 fields
| Monitored Circuits | 2 |
|---|---|
| Included Ct Sensors | 1Details & conditionsOne 50 A clamp in the box, a second CT is sold separately |
| Main Ct Rating | 50 ADetails & conditions80 A current transformers also supported |
| Branch Ct Rating | Not applicable / unspecified |
| Accuracy | ±2% |
| Split Phase | NoDetails & conditionsSingle-phase device with two current channels |
| Three Phase | No |
| Bidirectional Metering | Yes |
| Power Factor | YesDetails & conditionsActive and apparent power, power factor, voltage, current and frequency |
Connectivity8 fields
| 2.4 GHz Wi-Fi | Yes |
|---|---|
| 5 GHz Wi-Fi | No |
| Ethernet | No |
| Bluetooth | YesDetails & conditionsBluetooth 4.2, used for setup and as a Bluetooth gateway |
| Z Wave | No |
| Zigbee | No |
| Thread | No |
| Other | No |
Data Monitoring6 fields
| Real Time Updates | Not recorded |
|---|---|
| Data History | 10 daysDetails & conditions10 days of 1-minute records stored on the device, longer history in the Shelly cloud |
| Energy Cost Tracking | Yes |
| Time Of Use Rates | YesDetails & conditionsCost periods and tariff distribution in the Shelly Smart Control app |
| Data Export | YesDetails & conditionsCSV export of the consumption chart |
| Usage Alerts | Yes |
Features3 fields
| Relay Output | YesDetails & conditionsDry contact rated 2 A at 240 V for contactor control |
|---|---|
| Load Management | YesDetails & conditionsSwitch a contactor from consumption thresholds or schedules |
| Automations | Yes |
Installation4 fields
| Breaker Panel Install | YesDetails & conditionsAlso fits inside a wall box or an appliance control box |
|---|---|
| Din Rail Mount | No |
| Smart Meter Port | No |
| Power Supply | Mains (110-240 V) |
Integrations6 fields
| Google Home | Yes |
|---|---|
| Alexa | Yes |
| Apple Home | No |
| SmartThings | Yes |
| Home Assistant | Yes |
| Matter | No |
Local Control3 fields
| Local Api | YesDetails & conditionsRPC over HTTP and WebSocket, plus webhooks and scripting |
|---|---|
| Mqtt | Yes |
| Local Web Interface | Yes |
How this device compares
Shelly EM Gen3 vs Other Similar Models
Statistical context from 25 energy monitors in this catalog. These figures describe our recorded data, not independent measurements.
Recorded feature coverage
Relay Output: 4 of 25 known answers are Yes
Features: 16% among explicit Yes/No answers; 0 of 25 devices have no resolved answer. Check the specifications for this model’s conditions.
Recorded feature coverage
Bluetooth: 10 of 20 known answers are Yes
Connectivity: 50% among explicit Yes/No answers; 5 of 25 devices have no resolved answer. Check the specifications for this model’s conditions.
Recorded feature coverage
Mqtt: 12 of 23 known answers are Yes
Local Control: 52% among explicit Yes/No answers; 2 of 25 devices have no resolved answer. Check the specifications for this model’s conditions.
Brand representation in this directory
8 of 25 models are from Shelly
Counts energy monitors listed here, not sales or market share. Catalog inclusion does not imply a recommendation.
Side-by-side specification comparison
Compare Shelly EM Gen3 vs Similar Energy Monitors
See how Shelly EM Gen3 stacks up against other energy monitors in this catalog. Compare specifications, compatibility and pricing.
Catalog specifications have not all been independently checked against manufacturer sources. Read our data and evidence methodology.