Quick Summary (TL;DR)
For most European Home Assistant users wanting reliable local Wi-Fi metering, the Shelly Plug M Gen3 is an excellent starting point: its official Home Assistant integration communicates directly on the LAN, it meters power and energy, and it can switch an appropriately rated load. If switching is undesirable, choose the Shelly Plug PM Gen3 instead: despite being called a plug, it deliberately contains no switching relay and supports metering-only use. The TP-Link Tapo P110M is an accessible alternative with energy monitoring and a supported Home Assistant TP-Link integration, although onboarding and local authentication requirements are different from Shelly. For a Matter-over-Thread installation, Eve Energy is the stronger alternative, provided you have a working Thread border router and compatible Matter controller. An Aqara Smart PlugAliExpress price EU is worth considering if you already have a suitably supported Zigbee network.
Buy for the socket, load, and data—not just the protocol logo. UK Type G and continental European Type E/F outlets require different physical products. The EU Shelly Plug M Gen3 is rated at 13 A/3,000 W for its specified resistive load; the EU Tapo P110M listing states 16 A/3,680 W while the UK P110M is 13 A/2,990 W. Eve Energy’s continental European rating is 11 A/2,500 W. Those figures are not an invitation to run space heaters, compressors or EV charging equipment unattended: appliance type, startup current, duty cycle, socket condition and each manufacturer’s exclusions matter. Check that Home Assistant actually exposes a cumulative energy sensor in kWh before buying in bulk. A live power sensor in watts is not the same thing.
Our picks: which energy-monitoring smart plug should you buy?
This is an editorial comparison based on official product documentation and Home Assistant integration guidance, not a hands-on laboratory test. It prioritises stable local reporting and useful device energy readings over app screenshots, promotional feature counts or the highest claimed ampere rating. Smart plugs monitor a single outlet’s connected load; they do not replace a distribution-board meter or a certified meter for billing.
| Pick | Why choose it | Important limitation | Best fit |
|---|---|---|---|
| Shelly Plug M Gen3 (EU) | Local Shelly integration; relay switching plus power/energy readings; Matter available | 13 A / 3,000 W resistive; Type E/F form factor; Matter entity availability still needs checking | Best all-round EU Wi-Fi choice |
| Shelly Plug PM Gen3 (EU) | Local metering with no on/off relay; 16 A / 3,680 W resistive rating | Cannot isolate a load by software; not Matter according to Shelly comparison | Freezer, router or appliance you must not switch off remotely |
| TP-Link Tapo P110M | Affordable-feeling mainstream option; Home Assistant TP-Link integration; Matter variant | Requires initial provisioning and generally TP-Link account credentials for local integration; Matter metering depends on firmware/region | Budget-friendly Wi-Fi choice where account onboarding is acceptable |
| Eve Energy (Matter/Thread) | Thread-based, Matter energy reporting supported on current compatible firmware/controllers | Thread border router needed; EU 11 A / 2,500 W; UK 13 A / 2,900 W | Existing Matter-over-Thread homes |
| Aqara Smart PlugAliExpress price EU SP-EUC01 | Zigbee 3.0; potentially useful without another Wi-Fi client | Requires a compatible Zigbee coordinator/hub and verified converter/entity support; EU 10 A / 2,300 W | Established Zigbee networks |
Availability and model suffixes change. Shelly identifies the old Plug S Gen3 as discontinued and points to the Plug M Gen3 as its successor. A retailer advertising “Shelly Plug S”, “Plus Plug S”, “Plug S MTR”, “Plug M”, and “Plug PM” may be selling very different electronics. Use the exact manufacturer model and a current technical sheet, not a generic marketplace title.
What matters most: live watts, accumulated kWh and local access
A power-monitoring plug normally makes two categories of information available: an instantaneous active-power value (W), which answers “what is this device drawing now?”, and an accumulated energy value (Wh or kWh), which answers “how much has it consumed?”. Some expose current, voltage, power factor and frequency as well. A convenient app daily-use bar chart is not proof that the device exposes a persistent cumulative counter through Home Assistant. If the plug reconnects, reboots or loses Wi-Fi, the Home Assistant integration should ideally retain a trustworthy non-decreasing energy counter and reasonable statistics.
For example, a device drawing 80 W steadily for ten hours consumes 0.8 kWh. A 2,000 W kettle drawing energy for only five minutes consumes approximately 0.167 kWh, though its real power changes over the heating cycle. These illustrative calculations do not establish a particular plug’s metering accuracy. Most smart plugs are useful for trend and appliance-use analysis; do not advertise them as MID-certified revenue meters unless the specific model has that certification and it is valid for the intended application.
| Reading | Typical Home Assistant unit | What it means | Use |
|---|---|---|---|
| Active power | W | Current real power draw | Live tiles, alerts and automation triggers |
| Energy total | kWh (or Wh) | Accumulated consumption over the counter period | Individual-device Energy dashboard and long-term history |
| Current | A | Electric current measured by the plug | Diagnostic context; not a substitute for manufacturer current rating |
| Voltage | V | Mains voltage as seen by the device | Diagnostics and context for unusual power readings |
| On/off state | switch entity | Whether a device with a relay is energising the socket | Automation and manual control; absent by design on the Shelly Plug PM Gen3 |
| Wi-Fi strength / link quality | dBm or Zigbee link value | Radio-link conditions | Troubleshooting missing updates, not energy accounting |
For an Energy dashboard device entry, Home Assistant documents energy sensors with device class energy, an appropriate kWh/Wh unit and state class total or total_increasing. A normal live W sensor instead has device class power and state class measurement. Some recent Home Assistant displays accept live power sensors separately, but a lifetime kWh counter is the more reliable primary accounting source. Verify the actual integration-generated entities before creating a helper.
Shelly Plug M Gen3: best EU all-rounder for local control
Shelly’s Plug M Gen3 is a Type E/F-family Wi-Fi plug with a switched output, power metering and a manufacturer-stated 13 A / 3,000 W maximum for the specified resistive load. It uses 2.4 GHz Wi-Fi and has Bluetooth for local capabilities. Shelly presents Matter compatibility, but Matter commissioning should be treated as an alternative integration path rather than the reason to assume every historic energy measurement will be available. For this buyer’s goal, prefer the dedicated official Shelly integration first. The integration uses direct LAN communication; Shelly cloud access is not needed for normal Home Assistant monitoring.
After commissioning the plug onto your Wi-Fi network, find it under Settings → Devices & services, accept Shelly discovery or add the local IP address, and examine the entities on that device page. Check whether total consumption is exposed in Wh or kWh, whether entities are enabled, and how quickly power reports change. A router DHCP reservation is useful when your network configuration makes discovery unreliable. If advanced device security uses HTTPS, follow the current Shelly integration’s SSL guidance rather than disabling security blindly.
Do not confuse Plug M with the older Plug S generation: Shelly lists the Plug S Gen3 as discontinued. The new “M” rating is not a general increase in safe operating current for every kind of appliance. Always observe the load type and manufacturer exclusions. For any plug that controls mains power, review its power-on default: restoring the last state after an outage can restart connected equipment unexpectedly; defaulting off can spoil food or stop networking infrastructure.
Shelly Plug PM Gen3: best for monitoring a load you must not switch off
This model is unusually useful precisely because it does not contain a relay. Shelly specifies metering of the connected appliance and up to 16 A / 3,680 W for the specified resistive use, but it does not offer software on/off switching. That removes one class of automation error: an accidental service call cannot turn off the socket. It does not remove the risks of a poor socket connection, damaged appliance, overheating or an inappropriate load. The Plug PM Gen3 is not described by Shelly as a Matter model in its plug comparison; use the native Shelly integration for local telemetry.
A metering-only plug is attractive for an always-on router, a server, a refrigerator or a freezer when manual switching is undesirable. Do not assume that it can serve as a safety disconnect. Nor should the presence of its power measurements be used as evidence of a safe installation for the theoretical full 16 A continuously. The protective device, socket, ambient temperature, appliance duty cycle, contact quality and manufacturer operating requirements remain decisive.
If you do want an automation that cuts a device’s power when charging finishes or when standby power remains high, the PM variant is intentionally the wrong device. Choose a switched plug whose relay and load specification match the task, and do not use a generic smart plugAliExpress price as a protective cutoff for life-safety or unattended high-energy equipment.
Tapo P110M: good-value Wi-Fi and Matter option, with important caveats
The Tapo P110M is sold in physically different country versions. The Greek/EU listing specifies 16 A / 3,680 W for general/resistive loads and a 2.4 GHz Wi-Fi connection; the UK Type G listing specifies 13 A / 2,990 W. These are regional, load-qualified ratings, not contradictory specification errors. TP-Link separately warns against EV charging and against motors/compressors that exceed the relevant motor limit. Some appliances at nominally modest wattages can still have high starting current.
Home Assistant lists the P110M under the official TP-Link Smart Home integration. This integration performs local communication with supported plugs, but TP-Link describes an initial account-based provisioning path and cloud-account username/password authentication for newer devices. “Local data path” is not the same as “no account needed at any point”. Some firmware revisions also require a third-party compatibility setting to be enabled. Follow the Home Assistant and current TP-Link instructions for your hardware revision rather than forcing a community integration.
P110M also has Matter, but the amount of energy data surfaced through Matter is firmware- and controller-dependent. TP-Link’s US firmware notes discuss Matter 1.3 metering support and verification with Home Assistant, while an older UK product-page note still says Matter energy monitoring is forthcoming. Those regional notes cannot safely be merged into one universal claim. If your main aim is whole-month appliance kWh history, confirm the current UK/EU firmware and actual energy entities before deploying a dozen P110M plugs via Matter alone. The native TP-Link route may be more predictable for a particular setup.
The non-Matter P110 is still relevant where price and local TP-Link support matter more than Matter commissioning. Conversely, a P100 is not a good substitute for power metering merely because its casing looks similar; always confirm the exact suffix and feature matrix.
Eve Energy: best for a Matter-over-Thread household
Eve Energy uses Thread rather than Wi-Fi for the Matter version. Its official regional specification lists a continental European Type E/F variant at 11 A / 2,500 W and a British Type G version at 13 A / 2,900 W; it also lists separate ratings for US, Swiss and Australian models. The low-power radio does not exempt the plug from mains safety constraints. Installation depends on a functioning Matter controller and a Thread border router, which may be in the same physical device or separate devices depending on your ecosystem.
Eve’s 2025 announcement confirmed energy reporting through Matter and “Works With Home Assistant” support for relevant firmware. For a new installation, read the actual unit’s firmware and confirm that Home Assistant shows real-time watts and cumulative energy. Thread coverage, commissioning credentials, IPv6/multicast network behaviour and a properly integrated border router can matter more to reliability than the plug’s own specifications. Existing Apple or Google Thread equipment may provide the border-router function, but do not assume every smart-home hub is a Matter/Thread border router.
Choose Eve if you already operate Thread successfully and want less dependence on another 2.4 GHz Wi-Fi device. Do not buy it solely because a Matter logo appears on a product: other “Matter-compatible” plugs may use Matter over Wi-Fi, and energy measurements did not exist in every early Matter firmware implementation.
Aqara Smart Plug EU: an option for existing Zigbee users
The Aqara Smart PlugAliExpress price EU, model SP-EUC01, is a Zigbee 3.0 Type E/F-style model rated at 10 A / 2,300 W by Aqara. It needs a compatible Zigbee network: Aqara’s own hub is one option, while a supported Home Assistant Zigbee coordinator with ZHA or Zigbee2MQTT may work when that exact manufacturer model and firmware are supported. The Zigbee standard and the plug’s own energy-metering capability do not prove that every generic hub exposes a cumulative kWh entity. Check the relevant supported-device entry or converter first, including any known reporting quirks.
The appeal is straightforward: a Zigbee plug can act as a mains-powered router within an existing mesh, without adding another Wi-Fi client. But a poorly placed USB Zigbee adapter, 2.4 GHz interference or weak router coverage can cause reporting gaps. Adding an unnecessary proprietary hub solely for one smart plugAliExpress price can make the apparent low plug price misleading. Do not suggest a European Aqara plug for a UK Type G wall outlet, or a US Third Reality 15 A model for a UK/EU outlet, via an ad-hoc travel adaptor.
Wi-Fi vs Zigbee vs Matter/Thread: choose an integration path
| Path | What you need | Home Assistant access | Strength | Watch out for |
|---|---|---|---|---|
| Shelly Wi-Fi via Shelly integration | 2.4 GHz Wi-Fi; plug on reachable LAN | Official local integration | No vendor cloud needed for normal HA operation; detailed entities | Network segmentation, firmware-specific security and model differences |
| Tapo Wi-Fi via TP-Link integration | 2.4 GHz Wi-Fi; supported hardware/firmware; provisioning | Official local polling with authentication requirements | Broad model support; power and energy on metering variants | Initial vendor account, enabled third-party setting, firmware changes |
| Matter over Wi-Fi | Reachable Wi-Fi, Matter controller | Matter integration, if device exposes needed clusters | Multi-ecosystem commissioning | Energy data depends on the device firmware and cluster implementation |
| Matter over Thread | Thread border router plus Matter controller | Matter integration | Local mesh and modern energy reporting on supported models | Router/Thread topology and commissioning complexity |
| Zigbee | Compatible Zigbee coordinator and support for exact device | ZHA or Zigbee2MQTT (depending on device support) | Local mesh; no extra Wi-Fi client | Device-specific energy converter and reports; hub cost |
Matter is an application protocol; “Matter over Wi-Fi” and “Matter over Thread” use different radios. Zigbee is separate. Some Wi-Fi plugs support both a proprietary local API and Matter, but the exposed entities can differ between those paths. Connecting the same appliance through multiple integrations may create duplicate data entities; give one energy sensor the authoritative role in dashboards and automations.
UK versus EU electrical variants: the most common buying mistake
A UK household needs a plug and socket physically designed and certified for Type G (BS 1363), including the correct earth and fuse arrangements. Most continental European smart plugs instead fit the Type E/F/Schuko family and are not interchangeable. Check whether a product’s claimed 13 A or 16 A rating belongs to the UK or EU SKU: it is not a single worldwide specification. Also check how much space the enclosure occupies beside neighbouring sockets, particularly on strips or double outlets.
| Product family | European model / stated resistive rating | UK variant or requirement | Caution |
|---|---|---|---|
| Shelly Plug M Gen3 | Type E/F; 13 A / 3,000 W | Do not assume EU plug fits UK sockets; seek UK-specific certified alternative | Shelly M replaces discontinued Plug S Gen3 in EU listings |
| Shelly Plug PM Gen3 | Type E/F; 16 A / 3,680 W | Region-specific socket check | No relay — measuring only |
| Tapo P110M | Greek/EU page: 16 A / 3,680 W | UK Type G page: 13 A / 2,990 W | Manufacturer’s appliance-specific load exceptions apply |
| Eve Energy | EU Type E/F: 11 A / 2,500 W | UK Type G: 13 A / 2,900 W | Requires Matter/Thread infrastructure |
| Aqara Smart Plug EU SP-EUC01 | EU: 10 A / 2,300 W | EU product is not a UK Type G plug | Check coordinator/firmware energy support |
Load ratings describe limits, not endurance tests. Watts are not a universal substitute for amperes because load type and voltage matter. A compressor, pump, motor, switched-mode supply or transformer may generate an inrush well above running current; manufacturer motor limits can be dramatically below its published resistive limit. Treat EV charging as a separate category requiring suitable charging equipment, not a generic smart-plug scheduling trick. TP-Link expressly disallows EV charging on P110M. For heaters, extension strips and high-duty-cycle appliances, heed any stricter device-specific restrictions, inspect sockets and consult a qualified electrician when unsure.
Do you need switching or just monitoring?
It is easy to think all energy-monitoring plugs are remotely controllable. The Shelly Plug PM Gen3 proves otherwise: it measures without interrupting power. Conversely, switching plugs expose an extra failure mode: a delayed automation, unintended voice action or restoration policy may remove power from a critical device. The right answer depends on the appliance, not just the plug’s ampere rating.
| Appliance or use case | Better approach | Why |
|---|---|---|
| Television or media equipment | Switched metering plug if manufacturer permits | Power trends and optional standby scheduling; check inrush |
| Desktop workstation | Metering plug or switched model with manual disable | Measure idle and active use; avoid abrupt mains cuts during updates |
| Router, NAS or freezer | Non-switching monitor if rated for the load | Remove accidental remote-off risk; still consider UPS and outlet resilience |
| Washing machine, tumble dryer | Appropriately rated monitor only if manufacturer permits; use power as a completion signal | Heating/motor loads and cycling demand caution |
| Portable heater or portable air conditioner | Do not assume a generic smart plug is suitable | High duty cycle, thermal load, compressor inrush and product restrictions |
| EV charging | Dedicated EVSE with metering / documented integration | Safety, communication and thermal requirements beyond a consumer plug |
For a washer-done notification, an instantaneous power threshold must be sustained long enough to exclude heating pauses, soak cycles and a period in which the machine has not started. Use the plug as a sensor rather than automatically removing mains from an appliance that may need power to unlock a door or complete cooling. For server loads, a UPS with a supported integration is generally the appropriate protection against outages; a smart plug is just a measurement accessory.
Set up a new smart plug in Home Assistant without losing energy history
- Choose the correct regional model. Verify the retailer SKU, plug type, grounded outlet, nominal voltage, certified load category and seller warranty. Do not buy purely from a listing that says “16A energy smart plug”.
- Commission with the supported method. Use Shelly’s native setup, TP-Link app/provisioning, Matter QR-code process, or Zigbee join mode as directed for that model. Apply stable firmware where appropriate; record hardware revision.
- Add just one primary integration. In Settings → Devices & services, use the official Shelly, TP-Link, Matter or Zigbee integration. Do not duplicate the same physical plug through MQTT, Matter and native integrations without a clear reason.
- Inspect the device entities. Locate power (W), energy (Wh/kWh) and switch state, if present. Where a cumulative energy counter is disabled by default, enable the correct entity; avoid inventing a template solely because a daily-chart sensor is visible.
- Validate the reading. Use an ordinary low-risk appliance with a known approximate operating profile. Compare the live watts to expected range and observe whether the cumulative energy total rises. Do not use the mains plug for electrical testing or calibration of exposed conductors.
- Check energy-statistics compatibility. Open Settings → Developer tools → States (UI wording may vary). Verify energy device class, state class, and acceptable unit. Resolve long-term statistics issues before relying on the Energy dashboard.
- Add it as an individual device. Open Settings → Dashboards → Energy and add the correct cumulative sensor in the individual-devices area. If a whole-house or circuit meter is already shown, do not add the plug as a separate grid source and inadvertently double-count.
- Watch a restart and network outage. Confirm reporting resumes, check whether the total energy counter resets or jumps, and inspect how the plug behaves after a power cut. Store the chosen settings and firmware version for later troubleshooting.
Home Assistant now supports hierarchical upstream device relationships in individual-device reporting. If a plug is inside a monitored circuit, assign the appropriate upstream relationship where relevant instead of carelessly adding both as independent consumption. The plug’s appliance kWh figure is still useful, but it is a subset of the circuit or whole-home figure. This matters especially when an energy dashboard is also connected to a main service meter.
If the plug exposes watts but no usable kWh counter
First investigate whether an energy entity exists but is disabled or unavailable under the chosen integration. Check Home Assistant’s integration docs, product firmware, Matter energy cluster support and the device’s detailed entity list. If it genuinely provides only active power, Home Assistant’s Integral (Riemann sum integral) helper can estimate energy from the power readings. Use a suitably named helper with source in watts, an integration interval consistent with your sensor updates and kWh output. Be aware that this is an approximation sensitive to sampling intervals and disconnects, particularly for loads with short, high-power cycles.
If a plug publishes every 60 seconds, a 90-second kettle boil can be missed or badly approximated; frequent power updates offer a better approximation. A true accumulated meter usually behaves better across outages than a Home Assistant-only integration of snapshots. Do not convert W to kWh with a simple unit rename. Energy is the time integral of power. Nor should you blindly add two daily-reset kWh sensors together as a new total_increasing lifetime source; that can corrupt energy statistics when their reset times differ.
Reliability checks before you buy more than one
| Question to ask | Good answer | Warning sign |
|---|---|---|
| Does the plug work while internet access is down? | Home Assistant can still read live data on the local network | Only vendor cloud app displays metering |
| Is there a persistent kWh register? | Cumulative entity survives routine HA restart; documented reset semantics | Only the daily total in the vendor app |
| What happens after a mains outage? | Power-on behaviour is selectable or safe for this appliance | Unknown default or unintended restart |
| Does the meter support your exact region? | Correct Type E/F or Type G SKU and safety ratings | Travel adaptor, vague import listings, mismatched certifications |
| Can firmware remove or change local access? | Supported local protocol and a documented update path | Unmaintained reverse-engineered API as sole integration |
| Can your network reach the device? | Reliable 2.4 GHz coverage or healthy Zigbee/Thread mesh | IoT VLAN blocks discovery or the border router is unreachable |
| Is the sensor accurate at tiny standby loads? | Device documentation specifies relevant range/tolerance; cross-check possible | Only “high accuracy” advertising, no measurement range |
For a multi-plug deployment, start with one unit of the exact intended hardware revision. Run it for several days, including one Home Assistant restart and one loss-of-internet test. Confirm the energy total, integration availability, firmware stability and power-on state in your actual network. Only then expand. This simple pilot can save more time than comparing dozens of nominal specifications, especially when sellers mix old and new firmware versions.
What do energy-monitoring plugs cost to own?
The shelf price is not the total cost. Wi-Fi Shelly and Tapo units normally do not need a separate radio hub, but they do need suitable Wi-Fi coverage. Zigbee may require a USB coordinator and careful radio placement; Matter-over-Thread needs a Thread border router and controller. You may also need a better Wi-Fi access point, an electrician’s advice on a load, a replacement unsuitable socket, or a UPS for a critical server. These infrastructure costs are irrelevant if you already have the hardware, but quite important when the “cheap plug” is the first device of a new radio network.
A smart plug itself consumes electricity. A hypothetical 1 W continuously equals 8.76 kWh over 365 days, before considering varying radio and relay states. Actual standby demand differs by model and mode. The plug may also add heat at the socket; it is not a zero-loss metering instrument. To assess payback, estimate realistic avoidable energy consumption rather than claiming all monitored energy becomes savings. Monitoring a modern fridge does not magically reduce its compressor consumption.
Avoid fixed “best price” figures here: regional taxes, packs, promotions, imports and warranty arrangements change. Compare delivered price and exact regional certification at checkout. Do not treat a branded Matter logo or an advertised “no hub required” label as proof that the appliance can produce historical kWh measurements in your existing Home Assistant installation.
Which plug would we choose in real installations?
- A first EU Home Assistant installation: Shelly Plug M Gen3 via the native Shelly integration offers a straightforward local-first path and useful energy readings. Confirm the 13 A/3,000 W resistive limit suits the appliance.
- A fridge, freezer, router or NAS you do not want to switch off: Shelly Plug PM Gen3 removes the relay entirely. Check electrical suitability and whether the device’s physical plug fits your outlet.
- A UK Type G installation: a proper UK-market Tapo P110M or UK Eve Energy, selected with the correct load rating and preferred integration path. Do not import continental EU plugs and improvise adaptors.
- An existing Thread network: Eve Energy is attractive for Matter energy reporting where supported firmware, Thread coverage and controller integration are already working.
- An existing Zigbee setup: Aqara Smart Plug EU can be worthwhile if the exact SKU exposes power and energy through your chosen coordinator and converter. Test one before scaling.
- A three-phase board or a whole-property bill: none of these devices is the right primary meter. Look instead at a properly installed CT or DIN-rail meter and treat socket plugs as appliance-level detail.
Troubleshooting common Home Assistant smart-plug energy problems
| Symptom | Likely explanation | What to check |
|---|---|---|
| Switch works but no kWh sensor | Integration exposes on/off and W only; entity disabled; Matter reporting unsupported on that firmware | Device entity list, firmware, Matter clusters, TP-Link/Shelly native path |
| Energy sensor exists but cannot select it in Energy dashboard | Unit/device class/state class incompatible or statistics fault | Developer tools → States and Home Assistant Energy FAQ |
| Plug becomes unavailable intermittently | Weak 2.4 GHz, VLAN isolation, Zigbee/Thread mesh trouble | Router signal, routing, mDNS/IPv6 for Matter, coordinator placement |
| Graph jumps dramatically after reset | Incorrect sensor reset semantics or doubled daily counters | History, long-term statistics, actual lifetime energy entity |
| Meter shows apparent higher power than expected | Standby or startup spikes; appliance cycles; measurement tolerance | Observe multiple operating cycles; compare to rated running power |
| Plug unexpectedly turns off after outage | Restoration setting, overload trigger, schedule, remote switch automation | Device settings, automations, load and thermal protection logs |
| Cloud app works but HA does not | Account-based onboarding, unsupported firmware or restricted local access | Official integration setup, third-party compatibility option, IP reachability |
When identifying an unexpected power spike, do not substitute a nominal nameplate wattage for the observed appliance profile. Motor startup and reactive load behaviour can make brief readings confusing. Equally, an appliance can be drawing measurable current without a corresponding large active-power consumption because power factor matters. Home Assistant sensors are not a substitute for competent electrical fault-finding. Disconnect visibly damaged or overheating equipment safely and consult a qualified electrician.
Frequently asked questions
Can a smart plug measure whole-house electricity?
No. It measures the single load connected through that one outlet. A whole-house meter, solar inverter meter or CT arrangement installed at the right electrical boundary is required for property totals. To compare approaches, see ESP32 energy monitoring methods compared and ESP32 CT clamp energy monitor.
Is a Matter smart plug automatically a good Home Assistant energy monitor?
No. Matter can provide excellent local interoperability, and Home Assistant supports relevant energy reporting. But firmware, Matter version, device model and exposed clusters determine whether usable W and cumulative kWh entities appear. Read TP-Link and Eve’s specific firmware notes rather than inferring energy telemetry from “Matter certified”.
Can I use a 16 A plug for electric vehicle charging?
Do not infer EV charging suitability from its 16 A resistive rating. TP-Link explicitly states the P110M is not for EV charging. Vehicle charging is a long-duration high-load use case with dedicated equipment and safety requirements. Use a suitable EVSE with documented monitoring and local electrical compliance.
Should I add every appliance plug to grid consumption?
No. Appliance plugs are individual downstream loads, usually already included in your grid/whole-house meter. Add them in the individual-device monitoring section, use upstream hierarchy when appropriate, and avoid double-counting. Home Assistant’s individual energy usage guide explains this.
Is a cloud account required for the Tapo P110M?
The official TP-Link integration communicates locally with supported devices, but current documentation describes app onboarding and account-based authentication for Tapo and newer Kasa models. If initial vendor-account involvement is unacceptable, prefer a model with a documented entirely local configuration pathway, such as an appropriate Shelly plug, and verify your specific security requirements.
Is the Shelly Plug PM Gen3 a remotely switchable plug?
No. Shelly explicitly specifies metering-only operation with no internal switching relay. If you want software switching, choose a different Shelly plug, such as the appropriately rated Plug M Gen3.
Sources and technical references
The following official sources were consulted for model specifications and integration behaviour. Product pages, region pages and firmware versions should be rechecked before purchase:
- Shelly — Plug M Gen3 specifications (EU socket, switching, load rating, metering).
- Shelly — Plug PM Gen3 specifications (metering-only operation, 16 A rating).
- Shelly — Plug S/M/PM Gen3 differences (Matter support and model distinction).
- TP-Link Greece — Tapo P110M EU (16 A regional rating).
- TP-Link UK — Tapo P110M UK (13 A regional rating, use-case exclusions, Matter note).
- TP-Link — supported UK plug load types (motor/inrush and EV limitations).
- Eve — Energy regional technical details (Thread and ratings).
- Eve — Matter energy reporting and Home Assistant support (April 2025 announcement).
- Aqara — Smart Plug EU (Zigbee SP-EUC01).
- Home Assistant — Shelly (local device integration).
- Home Assistant — TP-Link Smart Home (Tapo local authentication and supported variants).
- Home Assistant — Zigbee Home Automation (coordinator and device support).
- Home Assistant — Matter (Matter controller and Thread requirements).
- Home Assistant — individual devices energy (energy data and hierarchies).
- Home Assistant — Energy FAQ (sensor properties and statistics).
Editorial note (October 2026): This is a documentation-based buying and integration guide; esp32.co.uk/ has not independently tested the compared plugs for metering accuracy, thermal endurance or fault performance. Ratings are manufacturer-stated, vary by regional SKU and load type, and do not substitute for national electrical requirements. Always use certified socket hardware and seek qualified advice for unusual or continuous high loads.
