SONOFF POW Elite ESP32 WiFi power meter switch handles up to 20A load

SONOFF POW Elite is an ESP32-powered smart power meter switch that can handle up to 20A max load to monitor the power consumption of all appliances in a whole room.

The data can be visualized in real-time on the built-in LCD or via the eWelink app, up to six-month of hourly power consumption history can be saved, and the system can also be integrated with third-party solutions such as a Home Assistant, IFTTT, and Alexa Energy dashboard.

SONOFF POW Elite ESP32 Power Meter

SONOFF POW Elite specifications:

  • WiSoC – Espressif Systems ESP32 dual-core Xtenxa processor @ up to 240 MHz with 2.4 GHz WiFi 4 and Bluetooth 4.2 connectivity
  • Wireless – 2.4GHz 802.11 b/g/n WiFi 4 (Bluetooth does not seem to be used)
  • Power Input/Output
    • POWR316D model – 100-240V~ 50/60Hz 16A Max
    • POWR320D model – 100-240V~50/60Hz 20A Max
  • Dimensions – 98 x 54 x 31mm (DIN Rail mountable)
  • Casing Material – PC V0 (Tested with UL94v-0 safety standard)
  • Safety – Overload protection with user-defined power, current, and voltage thresholds.
  • Certifications – CE, FCC, SRRC

ESP32 20A power meter

The eWelink app for iOS or Android is used not only to monitor the power consumption but since the device is also a switch, you can set schedules and scenes (e.g. turn off when power consumption > 20 kWh), and configure Amazon Alexa or Google Home to control the switch with voice commands. There’s also a LAN function so you’d even need access to the Internet to control the switch after the initial setup.

6-month power consumption history power meter

The power consumption data can also be exported to Excel or another spreadsheet for further processing. More details may be found in the documentation. SONOFF POW Elite is really new, and right now only the official eWelink app is supported, but there should also be support for the popular ESPHome and Tasmota open-source firmware given enough time.

The SONOFF POWR316D (16A) and POWR320D (20A) models are up for pre-order on ITEAD shop for $16.99 and $19.99 respectively with shipping scheduled to start on June 23, or less than one week from now.

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13 Replies to “SONOFF POW Elite ESP32 WiFi power meter switch handles up to 20A load”

  1. No where mentioned the energy metering standards/class …why so ? any specific energy metering ASIC used or …. ?

  2. At this price there’s really no point trying to make yours by yourself! That’s particularly important when playing with mains!

    1. Of course there is a point, do you trust some random Chinese companies? I can’t even trust Google and Apple these days, that’s one of the reasons HomeAssistant getting so popular despite the homebrews have all kinds of issues.

      1. At least I trust their PCB routing skills 10 times better than mine! Please be careful not to confuse software and hardware. Here you can simply replace their code with yours and be done with it.

        1. At this point the firmware is not open sourced, eWelink is yet another platform backed by an unknown Chinese company. The famous Chinese companies like Xiaomi are not trustworthy either, they for whatever reason upload my Wifi password to some server in China through vacuum robot I don’t know. TBH the Chinese companies could take over the U.S. overnight through their cheap Amazon ‘smart plug’s, it’s already too late to do anything about it.

          1. I wouldn’t use such crappy software. In case that was not clear enough, was solely speaking about reusing their *hardware*.

          2. this hardware is compatible with tasmota, buy the hardare for cheap , get tasmota on it, and voila you get an opensource system. if you still fear that esp32 sdk contains routines to phone home, then run openwrt on your router

      2. And one reason those issues even exist is because none of them want to play nice and let people use their own homebrew, they want every penny that they can get by buying their products.

  3. I’ve bought Sonoff rubbish in the past but never again. It is cheap shite and a waste of money. Their Zigbee crap is even worse.
    I will not buy anything Sonoff even if they are the only manufacturer of an item. Rest assured, it will fail, sooner rather than later.

  4. Kinda useless for many europeans. If this was a 3-phase unit, then i’d be usefull to measure power for the whole apartment.

  5. I had decided to move away from Sonoff after 2 Sonoff Pow2 melted due to the terrible connectors. Plus their “16A” relay… When you took the sticker off the top, was actually rated for 10A. But… I need a device to run a 15A load, so the 20A version should in theory allow a reasonable safety margin, and the new connectors look better. So I have ordered one to try out.

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