Shelly PM Mini Gen3 | WiFi Smart Power Meter 1 Channel 16 A | Home Automation | Bluetooth Gateway | Compatible with Alexa & Google Home | iOS Android App | No Hub Required | Smart Schedules

Just a week installed and it's working great tracking power to my furnace!I did opt to install it into an external plastic housing since installing it in the furnace electrical box would have shielded it with two very thick steel walls and I didn't think the WiFi signal would get out.Just keep that in mind when installing; WiFi doesn't like penetrating steel walls, steel ducting, and especially chicken wire!

I've seen some of the other reviews and I'd like to add some information for those looking at this device.1. Both 12 guage solid and stranded copper wire will fit in the screw down clamps on this device, though you do have to turn the screws out almost completely.2. Seeing as how this is useful only till 16A, and the closest US circuit rated below that are 15A circuits which uses 14 guage wiring, you should use and stick with 14 guage wire, stranded whenever possible as to allow the most contact area under the screw clamp. Why stranded? Cause of the next point...3. Solid wire would only allow for 2 or 3 very small points of contact within the screw clamp (4 if you put the wire in at an angle or bend it in some way), as the screw clamp cannot be torqued down to try and flatten the round solid wire for greater contact area, even as "soft" as copper may be. These little screw clamps will NOT be able to take the torque that a screw on a regular receptacle would be able to take to mash down on a solid copper wire. Which is why I say stick with stranded to allow the wire to easily "form" to the cavity of the clamp to allow more surface area contact. Just make sure to recheck that the screws are tight after some heat cycles on the unit in that circuit. I need to emphasize that these screws really can't be torqued down much, and may loosen over time (heat cycles from circuit use) because you can't put too much torque on them.

I really like all of the Shelly products. Admittedly, the initial setup of the first one i bought was confusing. I almost returned it but I'm very happy that i didn't. Now that I understand the how and why of setup it takes less than 2 minutes to get a new one going. They a dependable and easy to use. Love them.

This device is just what I was looking for to track consumption of a toaster oven on a dedicated circuit. It's always plugged in so I don't need the switching capability.This thing is so tiny! It easily fit behind a GFCI outlet in a standard single gang box.Paired up with the app as soon as I turned on power and Home Assistant immediately recognized it once it was connected to Wifi.I've only had it a day, but so far I'm really impressed and totally happy.

One of the output terminals is a little loose, but other than that it works great.

I love the Shelly brand because the devices are open and can work without cloud, which is how I have it -- connected to Home Assistant. Full functionality including firmware upgrades are supported.In this case I wanted to monitor a laundry machine so I could send alerts to my phone and/or smart displays when laundry is done. I wanted a better look than a smart outlet, and I knew I didn't want control (only monitoring) so the outlet is always powered, so I got this so I could put it into the outlet box, and it worked great.

This power-monitoring-only version only saves you 30¢ versus the Shelly that does power monitoring AND switching, so the number of use-cases for this device is pretty small. The reports and information in the app is the same for both versions.That said, it does work very well. You MUST be aware of the type of outlet box you have in your wall as some homes use metal boxes for their outlets, which will greatly reduce (or block) the WiFi signal this needs to work.There's not much to look at with this, as it's meant to be small enough to install inside the wall. The most important aspect are the reports and status screens available in the app OR in your HomeAssistant dashboard. As you can see from my screenshots, you can view the current voltage and amperage in use and you can also view comparison graphs (by day, week, month or even year!This one is wired-in to the outlet for my chest-freezer. You can see that in the last 30 days it has used 32.11 kWh of electricity (or about $5.78).

Finally a smart power monitor, where you don't run the risk of a critical load getting turned off by accident.The only thing that would make this power monitor better, would be a UL listing, and if each load terminal had independent monitoring, so you could monitor both sockets of a duplex outlet independently.