The Smart Device Compare comparison
Shelly Pro EM-50 vs Zemismart SPM02
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Key differences between Shelly Pro EM-50 and Zemismart SPM02
A summary of selected recorded differences between these energy monitors. Check the full specification table below for details and conditions.
Feature differences among your selected devices
- 2.4 GHz Wi-Fi (connectivity): Shelly Pro EM-50 — Yes; Zemismart SPM02 — No.
- Bluetooth (connectivity): Shelly Pro EM-50 — Yes (Bluetooth 4.2, also works as a Bluetooth gateway); Zemismart SPM02 — No.
- Ethernet (connectivity): Shelly Pro EM-50 — Yes; Zemismart SPM02 — No.
- Load Management (features): Shelly Pro EM-50 — Yes (Configurable load control to divert surplus PV production); Zemismart SPM02 — No.
Specifications to check side by side
- Other (connectivity): Shelly Pro EM-50 — Modbus; Zemismart SPM02 — No.
- Zigbee (connectivity): Shelly Pro EM-50 — No; Zemismart SPM02 — Zigbee Hub required (Zigbee 3.0, works with Tuya, Zigbee2MQTT and Home Assistant).
- Power Supply (installation): Shelly Pro EM-50 — Mains (100-260 V); Zemismart SPM02 — Mains (breaker panel).
- Monitored Circuits (metering): Shelly Pro EM-50 — 2; Zemismart SPM02 — 3 (Three independent measurement channels).
Information still to confirm
- 11 of 39 comparison fields lack a resolved value for at least one selected device. Missing information is not evidence that a feature is absent.
- Check the full table and manufacturer documentation before ruling out a device.
These observations are derived from recorded catalog data and have not all been independently verified. Confirm details with the manufacturer before purchasing.
Compare capabilities, compatibility and setup requirements.
What the catalog tells us
Understand the tradeoffs.
These counts describe the available data, not a quality score. More features do not automatically make a better device.
16differences with recorded values for every device
11rows with missing or unspecified information
Your priorities, side by side
Focus on what changes.
Mark the specifications you care about. Open manufacturer sources for verification scope; fields without citations remain catalog data. Expand notes for other qualifications.
Showing 39 of 39 rows. “Not recorded” does not mean “No”.
Connectivity
- Shelly Pro EM-50
- Yes
- Zemismart SPM02
- No
- Shelly Pro EM-50
- No
- Zemismart SPM02
- No
- Shelly Pro EM-50
- Yes
Catalog note
Bluetooth 4.2, also works as a Bluetooth gateway
- Zemismart SPM02
- No
- Shelly Pro EM-50
- Yes
- Zemismart SPM02
- No
- Shelly Pro EM-50
- Modbus
- Zemismart SPM02
- No
- Shelly Pro EM-50
- No
- Zemismart SPM02
- No
- Shelly Pro EM-50
- No
- Zemismart SPM02
- No
- Shelly Pro EM-50
- No
- Zemismart SPM02
- Zigbee Hub required
Catalog note
Zigbee 3.0, works with Tuya, Zigbee2MQTT and Home Assistant
Data Monitoring
- Shelly Pro EM-50
- Yes
Catalog note
CSV export of the consumption chart
- Zemismart SPM02
- Not recorded
- Shelly Pro EM-50
- 60 days
Catalog note
At least 60 days of 1-minute data stored on the device
- Zemismart SPM02
- Not applicable / unspecified
Catalog note
Chart analysis in the app, long-term history lives in the hub
- Shelly Pro EM-50
- Yes
- Zemismart SPM02
- Not recorded
- Shelly Pro EM-50
- Not recorded
- Zemismart SPM02
- Not recorded
- Shelly Pro EM-50
- Yes
Catalog note
Cost periods and tariff distribution in the Shelly Smart Control app
- Zemismart SPM02
- Not recorded
- Shelly Pro EM-50
- Yes
- Zemismart SPM02
- Yes
Catalog note
Alarm messaging on abnormal consumption
Features
- Shelly Pro EM-50
- Yes
- Zemismart SPM02
- Yes
Catalog note
Scene setting through the Zigbee hub or Home Assistant
- Shelly Pro EM-50
- Yes
Catalog note
Configurable load control to divert surplus PV production
- Zemismart SPM02
- No
- Shelly Pro EM-50
- Yes
Catalog note
Integrated switch with potential-free contacts, 2 A at 240 V
- Zemismart SPM02
- No
Installation
- Shelly Pro EM-50
- Yes
- Zemismart SPM02
- Yes
- Shelly Pro EM-50
- Yes
Catalog note
One DIN module wide
- Zemismart SPM02
- No
Catalog note
Fits above or below the protection devices without occupying DIN rail space
- Shelly Pro EM-50
- Mains (100-260 V)
- Zemismart SPM02
- Mains (breaker panel)
- Shelly Pro EM-50
- No
- Zemismart SPM02
- No
Integrations
- Shelly Pro EM-50
- Yes
- Zemismart SPM02
- No
Catalog note
Alexa has no energy meter device type and this meter has no relay to expose as a switch, so a skill has nothing to publish
- Shelly Pro EM-50
- No
- Zemismart SPM02
- No
- Shelly Pro EM-50
- Yes
- Zemismart SPM02
- Not recorded
- Shelly Pro EM-50
- Yes
- Zemismart SPM02
- Yes
Catalog note
Via Zigbee2MQTT
- Shelly Pro EM-50
- No
- Zemismart SPM02
- No
- Shelly Pro EM-50
- Yes
Catalog note
Via the official Shelly Cloud integration
- Zemismart SPM02
- No
Local Control
- Shelly Pro EM-50
- Yes
Catalog note
RPC over HTTPS and WebSocket, UDP, webhooks, scripting and Modbus TCP
- Zemismart SPM02
- No
- Shelly Pro EM-50
- Yes
- Zemismart SPM02
- No
- Shelly Pro EM-50
- Yes
- Zemismart SPM02
- No
Catalog note
No native MQTT, though Zigbee2MQTT republishes the readings
Metering
- Shelly Pro EM-50
- ±1%
Catalog note
Accuracy Class B for active energy, ±1% from 5 A to 50 A
- Zemismart SPM02
- ±1%
- Shelly Pro EM-50
- Yes
Catalog note
4 quadrant measurement with a returned energy counter
- Zemismart SPM02
- Yes
- Shelly Pro EM-50
- Not applicable / unspecified
- Zemismart SPM02
- Not applicable / unspecified
- Shelly Pro EM-50
- 2
Catalog note
2 x 50 A current transformers
- Zemismart SPM02
- Not applicable / unspecified
Catalog note
Inline measurement, cables up to 16 mm² pass through the apertures
- Shelly Pro EM-50
- 50 A
- Zemismart SPM02
- Not applicable / unspecified
Catalog note
Rated up to 63 A per channel without a current transformer
- Shelly Pro EM-50
- 2
- Zemismart SPM02
- 3
Manufacturer source
There are three independent measurement channels.
Zemismart SPM02 manufacturer product page →- Source section
- Product description
- Model
- Zemismart SPM02
- Region
- Manufacturer product page; no universal regional compatibility implied
- Firmware
- Not specified by this source
- Checked
The stated channel limit is 63 A; do not substitute ratings from other Zemismart models.
Document check only; not a hands-on test or verification of every regional or firmware variant.
Catalog note
Three independent measurement channels
- Shelly Pro EM-50
- Yes
Catalog note
Active and apparent power, power factor, frequency and voltage
- Zemismart SPM02
- Not recorded
- Shelly Pro EM-50
- No
Catalog note
Single-phase device with two current channels
- Zemismart SPM02
- Not recorded
- Shelly Pro EM-50
- No
- Zemismart SPM02
- Yes
Manufacturer source
The meter supports a three-phase installation.
Zemismart SPM02 manufacturer product page →- Source section
- Product description
- Model
- Zemismart SPM02
- Region
- Manufacturer product page; no universal regional compatibility implied
- Firmware
- Not specified by this source
- Checked
The stated channel limit is 63 A; do not substitute ratings from other Zemismart models.
Document check only; not a hands-on test or verification of every regional or firmware variant.
Catalog note
3P+N systems, or three separate single-phase circuits
| Specification | Shelly Pro EM-50 | Zemismart SPM02 |
|---|---|---|
| Connectivity | ||
| Yes | No | |
| No | No | |
YesCatalog noteBluetooth 4.2, also works as a Bluetooth gateway | No | |
| Yes | No | |
| Modbus | No | |
| No | No | |
| No | No | |
| No | Zigbee Hub requiredCatalog noteZigbee 3.0, works with Tuya, Zigbee2MQTT and Home Assistant | |
| Data Monitoring | ||
YesCatalog noteCSV export of the consumption chart | Not recorded | |
60 daysCatalog noteAt least 60 days of 1-minute data stored on the device | Not applicable / unspecifiedCatalog noteChart analysis in the app, long-term history lives in the hub | |
| Yes | Not recorded | |
| Not recorded | Not recorded | |
YesCatalog noteCost periods and tariff distribution in the Shelly Smart Control app | Not recorded | |
| Yes | YesCatalog noteAlarm messaging on abnormal consumption | |
| Features | ||
| Yes | YesCatalog noteScene setting through the Zigbee hub or Home Assistant | |
YesCatalog noteConfigurable load control to divert surplus PV production | No | |
YesCatalog noteIntegrated switch with potential-free contacts, 2 A at 240 V | No | |
| Installation | ||
| Yes | Yes | |
YesCatalog noteOne DIN module wide | NoCatalog noteFits above or below the protection devices without occupying DIN rail space | |
| Mains (100-260 V) | Mains (breaker panel) | |
| No | No | |
| Integrations | ||
| Yes | NoCatalog noteAlexa has no energy meter device type and this meter has no relay to expose as a switch, so a skill has nothing to publish | |
| No | No | |
| Yes | Not recorded | |
| Yes | YesCatalog noteVia Zigbee2MQTT | |
| No | No | |
YesCatalog noteVia the official Shelly Cloud integration | No | |
| Local Control | ||
YesCatalog noteRPC over HTTPS and WebSocket, UDP, webhooks, scripting and Modbus TCP | No | |
| Yes | No | |
| Yes | NoCatalog noteNo native MQTT, though Zigbee2MQTT republishes the readings | |
| Metering | ||
±1%Catalog noteAccuracy Class B for active energy, ±1% from 5 A to 50 A | ±1% | |
YesCatalog note4 quadrant measurement with a returned energy counter | Yes | |
| Not applicable / unspecified | Not applicable / unspecified | |
2Catalog note2 x 50 A current transformers | Not applicable / unspecifiedCatalog noteInline measurement, cables up to 16 mm² pass through the apertures | |
| 50 A | Not applicable / unspecifiedCatalog noteRated up to 63 A per channel without a current transformer | |
| 2 | 3Manufacturer sourceThere are three independent measurement channels. Zemismart SPM02 manufacturer product page →
The stated channel limit is 63 A; do not substitute ratings from other Zemismart models. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog noteThree independent measurement channels | |
YesCatalog noteActive and apparent power, power factor, frequency and voltage | Not recorded | |
NoCatalog noteSingle-phase device with two current channels | Not recorded | |
| No | YesManufacturer sourceThe meter supports a three-phase installation. Zemismart SPM02 manufacturer product page →
The stated channel limit is 63 A; do not substitute ratings from other Zemismart models. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note3P+N systems, or three separate single-phase circuits | |
Know what’s behind the comparison.
The table matches specifications by section and field. It preserves notes, separates missing data from explicit “No” values, and keeps qualifications attached to their values. No overall winner is assigned from feature counts.
Read our comparison methodology