Device Comparison
HomeWizard kWh Meter 3-Phase vs HomeWizard Wi-Fi kWh Meter 3-Phase vs Shelly 3EM vs Shelly 3EM-63T Gen3
A three-phase monitoring comparison for households choosing between HomeWizard app simplicity and Shelly local-integration flexibility.
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Which To Choose
Start with the practical fit, then read the table.
HomeWizard kWh Meter 3-Phase
Best fit when three-phase 3x220/230 V or 380/400 V installations; can monitor 3-phase production or consumption circuits., solar import/export visibility, and local dashboards and Home Assistant.
HomeWizard Wi-Fi kWh Meter 3-Phase
Best fit when three-phase 3x220/230 V or 380/400 V installations, solar import/export visibility, and local dashboards and Home Assistant.
Shelly 3EM
Best fit when three-phase systems or three independent single-phase circuits, solar import/export visibility, and local dashboards and Home Assistant.
Shelly 3EM-63T Gen3
Best fit when three-phase or three independent single-phase circuits, solar import/export visibility, and local dashboards and Home Assistant.
Use this comparison when you want three-phase visibility and the shortlist is down to HomeWizard convenience versus Shelly’s stronger local automation story.
At A Glance
Key fit signals before the full table
A quick pass over the most decision-shaping details for each device in this featured comparison.
HomeWizard kWh Meter 3-Phase
- Phase
- Three-phase 3x220/230 V or 380/400 V installations; can monitor 3-phase production or consumption circuits.
- Installation
- 35 mm DIN-rail direct-connected three-phase kWh meter installed in or near a circuit breaker box.
- Measurement
- Direct-connected three-phase bidirectional Wi-Fi kWh meter for consumption, production, solar, EV charger, heat-pump, or main-connection monitoring.
- Max current
- 100 A
HomeWizard Wi-Fi kWh Meter 3-Phase
- Phase
- Three-phase 3x220/230 V or 380/400 V installations
- Installation
- DIN-rail mounted inline three-phase kWh meter installed after the breaker in a circuit box
- Measurement
- Three-phase bidirectional inline Wi-Fi kWh meter for measuring consumption or production circuits
- Max current
- 100 A
Shelly 3EM
- Phase
- Three-phase systems or three independent single-phase circuits
- Installation
- Breaker-box or electrical-panel mounted energy meter with three external CT clamps
- Measurement
- Three-channel CT-based bidirectional energy meter with contactor control
- Max current
- 120 A
Shelly 3EM-63T Gen3
- Phase
- Three-phase or three independent single-phase circuits
- Installation
- Indoor meter mounted above or under DIN-rail mounted circuit breakers
- Measurement
- Three-channel four-quadrant smart energy meter for energy, voltage, current, active power, apparent power, and solar import/export monitoring
- Max current
- 63 A
Before You Decide
Checks that matter before price.
- Confirm your supply type first: single-phase, split-phase, or three-phase.
- Decide whether DIN-rail wiring, CT clamps, or utility-meter access fits your switchboard.
- Choose between cloud convenience and local data access before comparing prices.
- For solar homes, make sure import, export, and load readings are measured at the right point.
| Install fit | ||||
|---|---|---|---|---|
| Phase support | Three-phase 3x220/230 V or 380/400 V installations; can monitor 3-phase production or consumption circuits. | Three-phase 3x220/230 V or 380/400 V installations | Three-phase systems or three independent single-phase circuits | Three-phase or three independent single-phase circuits |
| Installation | 35 mm DIN-rail direct-connected three-phase kWh meter installed in or near a circuit breaker box. | DIN-rail mounted inline three-phase kWh meter installed after the breaker in a circuit box | Breaker-box or electrical-panel mounted energy meter with three external CT clamps | Indoor meter mounted above or under DIN-rail mounted circuit breakers |
| Measurement | Direct-connected three-phase bidirectional Wi-Fi kWh meter for consumption, production, solar, EV charger, heat-pump, or main-connection monitoring. | Three-phase bidirectional inline Wi-Fi kWh meter for measuring consumption or production circuits | Three-channel CT-based bidirectional energy meter with contactor control | Three-channel four-quadrant smart energy meter for energy, voltage, current, active power, apparent power, and solar import/export monitoring |
| Max current | 100 A | 100 A | 120 A | 63 A |
| Meter fit | ||||
| Accuracy class | Class B (MID) | Class B (MID) | Unknown | Class B active energy |
| Current sensing | Direct-connected three-phase metering up to 100 A; no external CTs required for the reviewed HWE-KWH3 product. | Direct connected up to 100A | 3 x 120A CTs included | Integrated non-contact 63 A current measurement through the Shelly 3EM-63T flat-terminal body |
| Monitoring | ||||
| Protocol | Wi-Fi / HomeWizard Local API JSON / HTTPS / WebSocket | Wi-Fi / Local API (JSON) / HTTPS / WebSocket | Wi-Fi / MQTT / CoAP / REST API | Wi-Fi / Bluetooth / MQTT / HTTP / WebSocket / RPC |
| Local API | Yes | Yes | Yes | Yes |
| Cloud dependency | HomeWizard app/cloud is used for setup, history, remote app features and Energy+ history. Local API can provide LAN access when enabled. | HomeWizard app and internet-connected Wi-Fi are used for normal setup, history, and remote app features, while the local API can be enabled for LAN access. | Optional cloud; can run locally over Wi-Fi with an embedded web interface and local protocols including MQTT, CoAP, and REST API. | Optional Shelly Cloud; local Wi-Fi web interface and MQTT/HTTP/WebSocket/RPC paths are available without cloud. |
| Home Assistant | Yes | Yes | Yes | Yes |
| Solar fit | ||||
| Solar import/export | Yes | Yes | Yes | Yes |
| Buying context | ||||
| Price range | About EUR 100-EUR 150 | About EUR 129.95 | About USD 121.49 | About USD 115 |
| Availability | Europe through HomeWizard's international webshop and localized EU markets; regional currency, delivery, and installer suitability vary. | Europe | Discontinued official Shelly 3EM product; historical Shelly USA page remains visible, but new availability is limited to remaining regional distributor or resale stock where still offered. | United States via Shelly USA official store; regional Shelly availability varies by market |
| Source check | ||||
| Last verified | Jun 13, 2026 | May 18, 2026 | Jun 5, 2026 | Jul 7, 2026 |
| Product page | Official page | Official page | Official page | Official page |
| Documentation | Official docs | Official docs | Official docs | Official docs |
Verdict
Choose HomeWizard for cleaner app-first monitoring, and Shelly when local APIs, Home Assistant, or more flexible automation are part of the plan.
FAQ
Common decision questions.
Which energy meter should I choose?
Choose the option that matches your installation constraints and data path first. For 4 energy meter options, the full table is most useful after you know whether local data access, cloud convenience, backup behavior, solar visibility, or expansion matters most.
What should I check before comparing prices?
Check installation fit, required accessories, official documentation, monitoring platform support, and any unknown fields in the source-checked table. Price is only useful once those constraints are clear.
Can these devices work with local dashboards or Home Assistant?
HomeWizard kWh Meter 3-Phase, HomeWizard Wi-Fi kWh Meter 3-Phase, Shelly 3EM, Shelly 3EM-63T Gen3 list Home Assistant support in the catalog. HomeWizard kWh Meter 3-Phase, HomeWizard Wi-Fi kWh Meter 3-Phase, Shelly 3EM, Shelly 3EM-63T Gen3 are marked with local API support. Confirm firmware, region, and integration maturity before treating this as a final compatibility guarantee.
Are unknown fields a reason to avoid a device?
Not always. Unknown means the field was not confirmed from the reviewed source data. Treat it as a question for the installer, reseller, or manufacturer before making a purchase decision.
Does the verdict replace the specification table?
No. The verdict is a practical shortcut. Use the table to confirm the exact constraints that matter for your home, especially installation, monitoring, and support details.