SONOFF WiFi Smart Power Meter Switch 20A, Smart Switch with Power and Energy Monitoring for Smart Home Automation, Works with Alexa, Support Remote Control from eWelink APP, POW Elite POWR320D

I purchased this Sonoff Power Monitor on a hunch as i couldn't find any information on it to see if it would work in a bidirectional way - ie to monitor wattage going in rather than out.I have a few sonoff products around my home and always find them to be great pieces of technology that work just how they are suppose too. You need to have the eWelink app installed to get the most out of these device, the app is free and easy to download.Connecting up this device was a breeze there are very decent quality connectors for you Live and Load inputs, and installation only took around 5 mins. Unfortunately as with all sonoff products i own there is no earth connector so i had to make my own.Once powered up i was extremely pleased to see that it was indeed bidirectional and measured the wattage and ampage coming in from my solar array. Checking the app i was able to watch the wattage from the panels increase as more sunlight hit the panels. The only thing that didn't work was the wattage as this displayed the grid wattage rather than the solar voltage, but Watts and Amps worked great. Remote control of the device was also great, i was able to switch on and off the mains portion of the device without issue from the device and the app.For standard appliance use, you can not go wrong with this energy monitor - it seems to be very accurate and will feed the data directly into the app, or you can just look at the LCD display - i do wish there was a backlight on the display as it was at times hard to read.Love this device! Recommended product!I hope that you found my review helpful.

Been using it for an automated switch connected to a 3000w car charger and works faultlessly! Links into Home assistant :)

I really like this as a 20A smart controller for the Hot Water tank.I like that you can control it using the App on a Smartphone, but in fact you don't need to.You programme it on your smartphone - say to come on for two hour periods to heat up the water tank. Then just leave it. It doesn't need your smartphone or a hub to run, the programming is on the device itself so it just keeps doing its job.I like that it stores up to six months data on it and you can download from it.Downside, is if for any reason the wifi goes off, it will not join the wifi again until the Sonos is powered off and on again, which is a bit of a pain.Also the mounting is tricky. It comes with a connector that allows you to add it to a DIN Rail in Consumer Unit, except if you mount it in there the display and buttons are blocked off unless you perform some serious surgery on the Consumer Unit.I ended up using a double socket Patress box, with a a double blanker on it - Then marking out the size of the Sonoff and cutting it out of the blanker. It works, keeps it tidy, and safe, but there has to be a better way, I just couldn't find it.I got another to provide power to the Central Heating, overkill, but allows me to monitor how much power the CH is pulling to keep the Pump running. About 300W a day.

Great device that works seamlessly with other sonoff products. Mine are also controlled by Google. Checks usage of power for devices. Wired mine up and mounted in a small blank empty consumer unit (for safety)am able to check how much devices are using on my phone via app.Its very informative as to how much things cost to run. Great easy to set up and use.

Very easy to install and connect to WiFi. No earth terminal supplied so you need to make your own.

Great product, service and delivery

Works as it should, the only down side I have noticed so far is that if the WiFi drops out they switch off, bit of a pain for my application but hopefully they won't do that too often.

I bought 5 of the POWR3 devices and installed them to control various heaters around the house early in the morning. I used the Alexa 'routines' so the heaters would come on at different times. All seemed fine at first then one day none came on at all. For the next few weeks or so all OK again, then some failed to switch on...etc. etc.In the end, I got so frustrated with the whole setup I ripped the lot out...Ewelink even stopped replying to my complaints in the end!USELESS not impressed!