I don’t see any topic for this less than a year old.
I’m looking for an energy monitoring plug that’s US 120V standard plug compatible and able to handle 20 amps. My web searches find a max of 16 amps, or UK plugs.
Sourced from somewhere besides Amazon would be ideal. And probably impossible.
Doesn’t matter what it looks like–maybe an outdoor plug would be fine. But not required.
Do you have a preferred radio type?
I use the zooz zen15 on heavy 15a loads but I don’t see many 20…
https://www.getzooz.com/zooz-zen15-power-switch/
(turn down it’s default reporting - very chatty for ZWave)
anything past that Id use an induction loop
I know you said not Amazon - but maybe these can be bought elsewhere. Last spring I got the 16A and 20A version (they have even higher rated versions) of this DIN rail mounted relays for my pool controls. I wasn’t looking for this format, wanted a switch, but they work.
https://www.amazon.com/dp/B0D5VCBPPW
So far so good with control and power reporting.
I’m not picky about radio. I’m already running Z-wave, Zigbee and Matter.
I posted in Zigbee because I know that market the least and it seems to have a lot of little oddball vendors and therefore wide variety.
You won’t find a “standard” plug that can support 20A, since that would require a NEMA 5-20, which looks like a standard plug but with one of the blades rotated 90°. But, even if you were ok with that, I’ve never seen one.
The larger switches are generally made for hard-wiring. Like this one from Aeotec, or this one from Zooz.
Rather than buying all the separate parts to make your own male & female 5-20 whips, you could just buy a short extension cord, cut it in half, and wire that up to the switch. Then you’d have a nice, professional-looking zwave switch that can plug into your outlet.
also not a ‘switch’ but shelly has a variety of relays that might suite your needs
What are you trying to control?
The relay rating in the specifications are for resistive loads, like a heating element. If it has a motor, it is an inductive load and the relay rating is diminished.
Typical miniature relays used in smart plugs (Songle SRD‑15A, Hongfa HF152F, etc.) have ratings like:
Some tuya crap is ok?
I don’t think you will find any serious manufacturer making 20A plugs.
https://it.aliexpress.com/item/1005009852869275.html
I use the tuya dinrail things in zigbee like Jason shows above.
I also agree with Stephen, if you are doing an AC unit or motor, add 50% to the motor rating at least because they are all rated for resistive loads if it doesn’t say otherwise. I think I put a 60amp one on a 20 amp load just so I didn’t have to worry.
Those dinrail tuya zigbee things worked well with my system.
I’m not trying to control anything. I’m intent on tracking energy use on a charger for a Nesher electric loader.
Then plug is not the best choice, they all have relay which is not rated for 20A charger.
If you are just needing energy monitoring, consider a whole house monitor at your circuit breaker panel. Most have some kind of coil which passively monitors usage without any relays or other complicated wiring changes.
I have an iotawatt but not sure what current availability for those are now. There are other options too.
This low cost energy meter (up to 50A) uses MySensors technology (nRF24 radio). It costs around USD$20 to build and would need a MySensors serial Gateway for another USD$5. The MySensors Integration works well. Mine has been running for a couple years now.
I have whole house monitoring through my Enphase integration, but it only provides a home total.
I’m looking to monitor more granularly.
Considering all the warnings on that GitHub page, and that I last took Electronics Shop in 1974 or so, I think I’ll pass on that solution.
Shelly EM or something similar to that line you want to observe.
there are several solutions available like the iotawatt for monitoring at the individual circuit level (including mains), if that is close enough, otherwise it is probably down to the shelly relays or similar
An FYI for anyone else looking to do this: at the moment, the only available iotawatt sensor setup costs over $400.
There are a couple of equivalents to the IotaWatt in the $130-$200 range (depending on sales & number of sensors) - Emporia Vue, SEM-Meter. I’ve used all 3 & they all work nicely - but the IotaWatt is the only one I have interfaced to HA (via a HACS implemented EmonCMS instance).
I vaguely recall that Emporia Vue uses an ESP chip inside so one could flash ESPHome…?
Obviously you would lose the clouds and charts that Emporia offers, but I also recall we have projects here that could more or less replicate the same. Example from my 10 sec search:
Energy Meter Tracker - Share your Projects! / Custom Integrations - Home Assistant Community
Home Assistant Energy Insights: Reusable dashboard package for solar, battery, EV, and billing - Share your Projects! - Home Assistant Community
