Meross
Meross Smart Wi-Fi Plug with Energy Monitor MSS310 (2-pack)
- Wi-Fi
Verified September 2026
This 2-pack lands around £11 a plug — cheaper than a single Tapo P110 (£12.99), but pricier than Tapo's own multipacks, which dip under £8/unit. The catch is HA support isn't native: it's the community meross_lan integration via HACS, so functionality depends on one volunteer maintainer rather than a vetted core integration — fine for tinkerers, a dealbreaker if you want zero-touch setup. Once installed it runs fully locally over HTTP/MQTT with no cloud round-trip. Best fit is multi-socket energy-monitoring rollouts (workshop, home office, several appliances) where the per-plug price undercuts buying singles — not a first smart plug for HA beginners.
In Home Assistant
| Control | Type | What it does |
|---|---|---|
| Switch | Toggle | Turn the plug on/off |
| Power / Current / Voltage | Sensor | Live readings |
| Energy | Sensor (kWh) | Hardware counter — resets at the device's own local midnight |
| Energy estimate | Sensor (kWh) | Software-sampled counter — resets on HA's clock, doesn't survive an HA restart |
The meross_lan HACS integration exposes two distinct energy sensors per plug — a hardware-computed one that resets at the device's own local midnight, and a software-sampled energy_estimate that resets on HA's clock and doesn't survive an HA restart — worth knowing before building a cost-tracking dashboard on either alone. Use energy_estimate specifically for an idle-appliance alert (wattage below a floor for 5+ minutes). Some MSS310 units on hardware 6.0.0/firmware 6.3.21 have shipped with switching working but all power/energy readings stuck at zero — a batch-specific firmware bug, not a setup mistake.
Specs
- voltage
- 100-240V AC, 50/60Hz
- max load
- 13A
- pack size
- 2
- plug type
- BS1363 Type G
- wifi band
- 2.4GHz only (Bluetooth used for initial setup)
- hub required
- false
- dimensions mm
- 67 x 67 x 48 (W x D x H, excl. plug pins)
- rated power w
- 3120
- energy monitoring
- true