Digital Display Energy Meter - AC Rail-Mounted Meter Electricity Usage Monitor for Voltage, Current, and Energy Consumption Measurement - GT2P-UID, AC 80~270V, 0~100A, 50/60Hz

It works as expected. Sadly there is no 220v version.

During the wiring, this is useful in monitoring the power. Once the project is done, a multi meter is better. Therese is a clip on the back to attach to a wall. This is not intended as a permanent feature.Thus image shows you the proper set-up should you lose the instructions.

Ti is the best it should have come with rail mount

El producto me parece bueno, solo tengo dudas de el número de cableado que debe llevar, por ser de 100 A Los conectores me parecen muy delgados para un cable #4

I take great offence when a company states I'll have it in two days but it doesn't come for a week. Will not measure 3 phase 220V. It's quite small. I guess a person could use two of these to measure each 110 V line of the 220 circuit.UPDATE: I ordered a second meter and connect each to a 120 volt line. If both meters are reading 120 volts, the 240 volt circuit is complete. I mounted them in a HT-5 Mollom box with a rail mount. I changed to 5 stars and would included a photo but the system won't let me.Update: back to three stars. The voltage output reading is red and totally not readable in sunlight, defeating the very purpose for the purchase.

Works great! We use this because we rent out an ADU. Installed it inside the breaker box to keep track of tenant power usage so we can split the power bill fairly. One day, power outage and BOOM! Over Half a month worth of usage data lost. Problem is that tenant now refuse to pay for that half of the month because there is no accurate proof of how much they are using. They claim they used less power that month. Still in conflict and going to invest in something better. This time, one with Memory so that data isn't lost when power is out like this. Sigh.