Baomain DDS238-4 DIN Rail Single Phase Kilowatt Hour kwh Meter Meter 220V 20A (100A) LCD Display Electricity Meter for AC Systems

I installed 1 on my Dryer and 1 on my Central AC , i am righting down the usage numbers each month so i know what these appliances are using just by themselves , do not cut your wires to install this, be sure all covers are on before turning power back on, I have duel single phase electric, I installed mine beside my main electric panel, do not try this on your own if you do not know how electric works and you if you have not worked with electric before, you can NOT reset the numbers after reading ,same as your main electric meter,

I was hesitant to buy this at first because the picture showed a 50 Hz model and I wasn't sure from the markings whether it would handle 20 amps or 100 amps - I wanted something for 50 amps of 240 volts for charging my Tesla. After a few questions and getting prompt answers from the vendor, I felt assured and purchased it.Connections are pretty straight forward, but you are dealing with very high power and voltage so it is better left to an electrician if you are unsure. This needs to be mounted inside a box so that connections are all protected. I fit it in a standard Jbox, just barely, with a customized cover plate, but I saw some ready made boxes are available and those seem like a good choice.This has been working well for me for several months. A little red dot flashes to indicate energy being delivered. This cross checks well to the Tesla's built-in measurement of kWh and provides a nice running total to help you make decisions such as what electrical rate plan to choose. It also can help you see the "phantom power" used by leaving the car plugged in after a full charge.

I bought this Kilowatt hour meter and installed it in a clear-cover junction box next to my 240 volt hot water heater to monitor power used. My apartment has a separate feed to the water heater, bypassing the indoor fuse-box where I have a whole-house energy monitor. So to get total energy consumed, I add this reading to the other monitor and both combined usually match the KwH meter on side of building. But it's much easier to just check my indoor meters rather than trek outside.

The description leaves a bit to wonder at. but this item works with 110-230v 50 or 60hz.Install is as easy as(1) Throwing the upstream breaker ( kill the power to the line you will install this on )(2) Pull the wire group ( hot(s), neutral,and ground) out where you will install this device.(3) Strip back the sheathing so there will be room for this.(4) Thread either the hot and neutral (110v) or both hots(220-240v) through the two openings in the meter. use the two white wire guides included.(5) Reinstall your wire group to where you disconnected from.(6) Tighten the two screws that will puncture the wires ( provides power for the meter ).(7) Turn the upstream breaker back on.(8) Pat yourself on the back.Sounds complicated but this was my first install, and it only took about 10 minutes. I am very pleased with it.Now the little instruction pamplet is another matter. it's written in Chinglish, and is just about incomprehensible. The seller would do well to provide a better written one. I'd even write one up with pictures if the seller contacted me.

Ok so very little info But I have the answers, First 220v in Europe they produce real 220v of AC at 50HZ. In the U.S. we use two separate lines of 120vac together to make 240vac at 60hz. So on this meter you can use L1 or load 1 say is your black wire or load wire of one side at 120vac and the L2 wire is marked L2/N meaning load 2 which might be say your white or red wire out , the other 120vac side, of a 220vac breaker. The N means neutral so it can also be used as your neutral or white wire on 120vac kinda like your ground wire. Look in your circuit breaker box to see which wires come out of your breaker for color of wire code. Some people use white as hot and black as ground but many use black as hot or L1 and white as neutral or ground for 120vac. 220vac is usually black for one side and red for the other 120vac side, ground/neutral can be white wire which you bypass around this meter and copper wire with no shielding is earth ground but check yours first. Now the two little wire inputs marked as l2 and l3 are marked SO meaning switch over this is for something like a generator trigger input which is a square wave power.