The Smart Device Compare comparison
Refoss EM16P vs Shelly Pro EM-50
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Key differences between Refoss EM16P and Shelly Pro EM-50
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
- Ethernet (connectivity): Refoss EM16P — No; Shelly Pro EM-50 — Yes.
- Time Of Use Rates (data monitoring): Refoss EM16P — No; Shelly Pro EM-50 — Yes (Cost periods and tariff distribution in the Shelly Smart Control app).
- Relay Output (features): Refoss EM16P — No; Shelly Pro EM-50 — Yes (Integrated switch with potential-free contacts, 2 A at 240 V).
- Din Rail Mount (installation): Refoss EM16P — No; Shelly Pro EM-50 — Yes (One DIN module wide).
Specifications to check side by side
- Other (connectivity): Refoss EM16P — No; Shelly Pro EM-50 — Modbus.
- Data History (data monitoring): Refoss EM16P — 5 years (Daily data 5 years, hourly 2 years, minute 2 months, plus 7 days of minute data stored locally); Shelly Pro EM-50 — 60 days (At least 60 days of 1-minute data stored on the device).
- Power Supply (installation): Refoss EM16P — Mains (100-240 V); Shelly Pro EM-50 — Mains (100-260 V).
- Accuracy (metering): Refoss EM16P — ±2%; Shelly Pro EM-50 — ±1% (Accuracy Class B for active energy, ±1% from 5 A to 50 A).
Information still to confirm
- 2 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
2rows 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
- Refoss EM16P
- Yes
- Shelly Pro EM-50
- Yes
- Refoss EM16P
- No
- Shelly Pro EM-50
- No
- Refoss EM16P
- Yes
- Shelly Pro EM-50
- Yes
Catalog note
Bluetooth 4.2, also works as a Bluetooth gateway
- Refoss EM16P
- No
- Shelly Pro EM-50
- Yes
- Refoss EM16P
- No
- Shelly Pro EM-50
- Modbus
- Refoss EM16P
- No
- Shelly Pro EM-50
- No
- Refoss EM16P
- No
- Shelly Pro EM-50
- No
- Refoss EM16P
- No
- Shelly Pro EM-50
- No
Data Monitoring
- Refoss EM16P
- Yes
- Shelly Pro EM-50
- Yes
Catalog note
CSV export of the consumption chart
- Refoss EM16P
- 5 years
Catalog note
Daily data 5 years, hourly 2 years, minute 2 months, plus 7 days of minute data stored locally
- Shelly Pro EM-50
- 60 days
Catalog note
At least 60 days of 1-minute data stored on the device
- Refoss EM16P
- Yes
- Shelly Pro EM-50
- Yes
- Refoss EM16P
- Not recorded
- Shelly Pro EM-50
- Not recorded
- Refoss EM16P
- No
- Shelly Pro EM-50
- Yes
Catalog note
Cost periods and tariff distribution in the Shelly Smart Control app
- Refoss EM16P
- Yes
Catalog note
Per-circuit usage targets
- Shelly Pro EM-50
- Yes
Features
- Refoss EM16P
- Yes
- Shelly Pro EM-50
- Yes
- Refoss EM16P
- Yes
Catalog note
Zero feed-in and peak management automations
- Shelly Pro EM-50
- Yes
Catalog note
Configurable load control to divert surplus PV production
- Refoss EM16P
- No
- Shelly Pro EM-50
- Yes
Catalog note
Integrated switch with potential-free contacts, 2 A at 240 V
Installation
- Refoss EM16P
- Yes
- Shelly Pro EM-50
- Yes
- Refoss EM16P
- No
- Shelly Pro EM-50
- Yes
Catalog note
One DIN module wide
- Refoss EM16P
- Mains (100-240 V)
- Shelly Pro EM-50
- Mains (100-260 V)
- Refoss EM16P
- No
- Shelly Pro EM-50
- No
Integrations
- Refoss EM16P
- 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
- Yes
- Refoss EM16P
- No
- Shelly Pro EM-50
- No
- Refoss EM16P
- No
- Shelly Pro EM-50
- Yes
- Refoss EM16P
- Yes
Catalog note
Native integration, no firmware flashing
- Shelly Pro EM-50
- Yes
- Refoss EM16P
- No
- Shelly Pro EM-50
- No
- Refoss EM16P
- No
- Shelly Pro EM-50
- Yes
Catalog note
Via the official Shelly Cloud integration
Local Control
- Refoss EM16P
- Yes
Catalog note
Open API with JSON-RPC 2.0 over HTTP and webhooks
- Shelly Pro EM-50
- Yes
Catalog note
RPC over HTTPS and WebSocket, UDP, webhooks, scripting and Modbus TCP
- Refoss EM16P
- Yes
- Shelly Pro EM-50
- Yes
- Refoss EM16P
- Yes
- Shelly Pro EM-50
- Yes
Metering
- Refoss EM16P
- ±2%
- Shelly Pro EM-50
- ±1%
Catalog note
Accuracy Class B for active energy, ±1% from 5 A to 50 A
- Refoss EM16P
- Yes
- Shelly Pro EM-50
- Yes
Catalog note
4 quadrant measurement with a returned energy counter
- Refoss EM16P
- 60 A
- Shelly Pro EM-50
- Not applicable / unspecified
- Refoss EM16P
- 18
Catalog note
2 x 200 A mains and 16 x 60 A branch sensors
- Shelly Pro EM-50
- 2
Catalog note
2 x 50 A current transformers
- Refoss EM16P
- 200 A
- Shelly Pro EM-50
- 50 A
- Refoss EM16P
- 18
- Shelly Pro EM-50
- 2
- Refoss EM16P
- Yes
- Shelly Pro EM-50
- Yes
Catalog note
Active and apparent power, power factor, frequency and voltage
- Refoss EM16P
- Yes
- Shelly Pro EM-50
- No
Catalog note
Single-phase device with two current channels
- Refoss EM16P
- Yes
- Shelly Pro EM-50
- No
| Specification | Refoss EM16P | Shelly Pro EM-50 |
|---|---|---|
| Connectivity | ||
| Yes | Yes | |
| No | No | |
| Yes | YesCatalog noteBluetooth 4.2, also works as a Bluetooth gateway | |
| No | Yes | |
| No | Modbus | |
| No | No | |
| No | No | |
| No | No | |
| Data Monitoring | ||
| Yes | YesCatalog noteCSV export of the consumption chart | |
5 yearsCatalog noteDaily data 5 years, hourly 2 years, minute 2 months, plus 7 days of minute data stored locally | 60 daysCatalog noteAt least 60 days of 1-minute data stored on the device | |
| Yes | Yes | |
| Not recorded | Not recorded | |
| No | YesCatalog noteCost periods and tariff distribution in the Shelly Smart Control app | |
YesCatalog notePer-circuit usage targets | Yes | |
| Features | ||
| Yes | Yes | |
YesCatalog noteZero feed-in and peak management automations | YesCatalog noteConfigurable load control to divert surplus PV production | |
| No | YesCatalog noteIntegrated switch with potential-free contacts, 2 A at 240 V | |
| Installation | ||
| Yes | Yes | |
| No | YesCatalog noteOne DIN module wide | |
| Mains (100-240 V) | Mains (100-260 V) | |
| No | No | |
| Integrations | ||
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 | Yes | |
| No | No | |
| No | Yes | |
YesCatalog noteNative integration, no firmware flashing | Yes | |
| No | No | |
| No | YesCatalog noteVia the official Shelly Cloud integration | |
| Local Control | ||
YesCatalog noteOpen API with JSON-RPC 2.0 over HTTP and webhooks | YesCatalog noteRPC over HTTPS and WebSocket, UDP, webhooks, scripting and Modbus TCP | |
| Yes | Yes | |
| Yes | Yes | |
| Metering | ||
| ±2% | ±1%Catalog noteAccuracy Class B for active energy, ±1% from 5 A to 50 A | |
| Yes | YesCatalog note4 quadrant measurement with a returned energy counter | |
| 60 A | Not applicable / unspecified | |
18Catalog note2 x 200 A mains and 16 x 60 A branch sensors | 2Catalog note2 x 50 A current transformers | |
| 200 A | 50 A | |
| 18 | 2 | |
| Yes | YesCatalog noteActive and apparent power, power factor, frequency and voltage | |
| Yes | NoCatalog noteSingle-phase device with two current channels | |
| Yes | 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