The Smart Device Compare comparison
Shelly Pro EM-50 vs Zemismart SPM01
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Key differences between Shelly Pro EM-50 and Zemismart SPM01
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 SPM01 — No.
- Bluetooth (connectivity): Shelly Pro EM-50 — Yes (Bluetooth 4.2, also works as a Bluetooth gateway); Zemismart SPM01 — No.
- Ethernet (connectivity): Shelly Pro EM-50 — Yes; Zemismart SPM01 — No.
- Load Management (features): Shelly Pro EM-50 — Yes (Configurable load control to divert surplus PV production); Zemismart SPM01 — No.
Specifications to check side by side
- Other (connectivity): Shelly Pro EM-50 — Modbus; Zemismart SPM01 — No.
- Zigbee (connectivity): Shelly Pro EM-50 — No; Zemismart SPM01 — Zigbee Hub required (Zigbee 3.0 on a Tuya ZS2S module, works with any certified hub, no Tuya gateway needed).
- Power Supply (installation): Shelly Pro EM-50 — Mains (100-260 V); Zemismart SPM01 — Mains (110-240 V).
- Monitored Circuits (metering): Shelly Pro EM-50 — 2; Zemismart SPM01 — 1.
Information still to confirm
- 10 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.
14differences with recorded values for every device
10rows 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 SPM01
- No
- Shelly Pro EM-50
- No
- Zemismart SPM01
- No
- Shelly Pro EM-50
- Yes
Catalog note
Bluetooth 4.2, also works as a Bluetooth gateway
- Zemismart SPM01
- No
- Shelly Pro EM-50
- Yes
- Zemismart SPM01
- No
- Shelly Pro EM-50
- Modbus
- Zemismart SPM01
- No
- Shelly Pro EM-50
- No
- Zemismart SPM01
- No
- Shelly Pro EM-50
- No
- Zemismart SPM01
- No
- Shelly Pro EM-50
- No
- Zemismart SPM01
- Zigbee Hub required
Catalog note
Zigbee 3.0 on a Tuya ZS2S module, works with any certified hub, no Tuya gateway needed
Data Monitoring
- Shelly Pro EM-50
- Yes
Catalog note
CSV export of the consumption chart
- Zemismart SPM01
- Not recorded
- Shelly Pro EM-50
- 60 days
Catalog note
At least 60 days of 1-minute data stored on the device
- Zemismart SPM01
- Not applicable / unspecified
Catalog note
Accumulated, hourly, daily and monthly totals, history lives in the hub
- Shelly Pro EM-50
- Yes
- Zemismart SPM01
- Not recorded
- Shelly Pro EM-50
- Not recorded
- Zemismart SPM01
- 1 s
Catalog note
Reporting interval adjustable per value, 30 seconds by default
- Shelly Pro EM-50
- Yes
Catalog note
Cost periods and tariff distribution in the Shelly Smart Control app
- Zemismart SPM01
- Not recorded
- Shelly Pro EM-50
- Yes
- Zemismart SPM01
- Not recorded
Features
- Shelly Pro EM-50
- Yes
- Zemismart SPM01
- Yes
Catalog note
Through the Zigbee hub or Home Assistant, not the device itself
- Shelly Pro EM-50
- Yes
Catalog note
Configurable load control to divert surplus PV production
- Zemismart SPM01
- No
- Shelly Pro EM-50
- Yes
Catalog note
Integrated switch with potential-free contacts, 2 A at 240 V
- Zemismart SPM01
- No
Installation
- Shelly Pro EM-50
- Yes
- Zemismart SPM01
- Yes
- Shelly Pro EM-50
- Yes
Catalog note
One DIN module wide
- Zemismart SPM01
- No
Catalog note
18 mm wide body that sits above or below the circuit breakers without taking a DIN module
- Shelly Pro EM-50
- Mains (100-260 V)
- Zemismart SPM01
- Mains (110-240 V)
- Shelly Pro EM-50
- No
- Zemismart SPM01
- No
Integrations
- Shelly Pro EM-50
- Yes
- Zemismart SPM01
- 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 SPM01
- No
- Shelly Pro EM-50
- Yes
- Zemismart SPM01
- Not recorded
- Shelly Pro EM-50
- Yes
- Zemismart SPM01
- Yes
Manufacturer source
Home Assistant use through Zigbee2MQTT is documented.
Zemismart SPM01 manufacturer product page →- Source section
- Product description
- Model
- Zemismart SPM01
- Region
- Manufacturer product page; no universal regional compatibility implied
- Firmware
- Not specified by this source
- Checked
A compatible Zigbee coordinator and integration are required.
Document check only; not a hands-on test or verification of every regional or firmware variant.
Catalog note
Via Zigbee2MQTT or ZHA
- Shelly Pro EM-50
- No
- Zemismart SPM01
- No
- Shelly Pro EM-50
- Yes
Catalog note
Via the official Shelly Cloud integration
- Zemismart SPM01
- Yes
Catalog note
Pairs with a SmartThings hub as a standard Zigbee 3.0 device
Local Control
- Shelly Pro EM-50
- Yes
Catalog note
RPC over HTTPS and WebSocket, UDP, webhooks, scripting and Modbus TCP
- Zemismart SPM01
- No
- Shelly Pro EM-50
- Yes
- Zemismart SPM01
- No
- Shelly Pro EM-50
- Yes
- Zemismart SPM01
- 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 SPM01
- ±1%
Catalog note
Accuracy Class 1 per IEC 61557-12
- Shelly Pro EM-50
- Yes
Catalog note
4 quadrant measurement with a returned energy counter
- Zemismart SPM01
- Yes
Catalog note
Separate forward and reverse energy totals for solar
- Shelly Pro EM-50
- Not applicable / unspecified
- Zemismart SPM01
- Not applicable / unspecified
- Shelly Pro EM-50
- 2
Catalog note
2 x 50 A current transformers
- Zemismart SPM01
- Not applicable / unspecified
Catalog note
Inline measurement, the conductor is threaded through the body
- Shelly Pro EM-50
- 50 A
- Zemismart SPM01
- Not applicable / unspecified
Catalog note
Rated up to 63 A without a current transformer
- Shelly Pro EM-50
- 2
- Zemismart SPM01
- 1
Manufacturer source
The meter monitors a single-phase circuit.
Zemismart SPM01 manufacturer product page →- Source section
- Product description
- Model
- Zemismart SPM01
- Region
- Manufacturer product page; no universal regional compatibility implied
- Firmware
- Not specified by this source
- Checked
A compatible Zigbee coordinator and integration are required.
Document check only; not a hands-on test or verification of every regional or firmware variant.
- Shelly Pro EM-50
- Yes
Catalog note
Active and apparent power, power factor, frequency and voltage
- Zemismart SPM01
- Yes
Catalog note
Voltage, current, power, power factor and energy
- Shelly Pro EM-50
- No
Catalog note
Single-phase device with two current channels
- Zemismart SPM01
- No
- Shelly Pro EM-50
- No
- Zemismart SPM01
- No
| Specification | Shelly Pro EM-50 | Zemismart SPM01 |
|---|---|---|
| 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 on a Tuya ZS2S module, works with any certified hub, no Tuya gateway needed | |
| 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 noteAccumulated, hourly, daily and monthly totals, history lives in the hub | |
| Yes | Not recorded | |
| Not recorded | 1 sCatalog noteReporting interval adjustable per value, 30 seconds by default | |
YesCatalog noteCost periods and tariff distribution in the Shelly Smart Control app | Not recorded | |
| Yes | Not recorded | |
| Features | ||
| Yes | YesCatalog noteThrough the Zigbee hub or Home Assistant, not the device itself | |
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 note18 mm wide body that sits above or below the circuit breakers without taking a DIN module | |
| Mains (100-260 V) | Mains (110-240 V) | |
| 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 | YesManufacturer sourceHome Assistant use through Zigbee2MQTT is documented. Zemismart SPM01 manufacturer product page →
A compatible Zigbee coordinator and integration are required. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog noteVia Zigbee2MQTT or ZHA | |
| No | No | |
YesCatalog noteVia the official Shelly Cloud integration | YesCatalog notePairs with a SmartThings hub as a standard Zigbee 3.0 device | |
| 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%Catalog noteAccuracy Class 1 per IEC 61557-12 | |
YesCatalog note4 quadrant measurement with a returned energy counter | YesCatalog noteSeparate forward and reverse energy totals for solar | |
| Not applicable / unspecified | Not applicable / unspecified | |
2Catalog note2 x 50 A current transformers | Not applicable / unspecifiedCatalog noteInline measurement, the conductor is threaded through the body | |
| 50 A | Not applicable / unspecifiedCatalog noteRated up to 63 A without a current transformer | |
| 2 | 1Manufacturer sourceThe meter monitors a single-phase circuit. Zemismart SPM01 manufacturer product page →
A compatible Zigbee coordinator and integration are required. Document check only; not a hands-on test or verification of every regional or firmware variant. | |
YesCatalog noteActive and apparent power, power factor, frequency and voltage | YesCatalog noteVoltage, current, power, power factor and energy | |
NoCatalog noteSingle-phase device with two current channels | No | |
| No | No | |
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