Modbus Single Phase, Electric Energy Meter - Electricity Meter to Measure Low-amp Circuits - Pulse Output 1 1000imp/kWh - RS485 Modbus - SDM120-MODBUS-MID

I fitted this to sub-meter my business workshop, which is supplied from the house consumer unit. I housed it in the workshop CU - a really easy fit as this unit has a good quality locking slider for the DIN rail. Just remember you will ideally want to position next to the main switch/rcd and alter the live busbar such that all the breakers are fed from the live out out of this unit.

Spot on works as described by seller

These units are easy to fit and give a good indication of the KWh consumed through them. They fit on the DIN rail but will require the live conductor lugs cutting off. The units have cable connections in and out. They are rated to 45amps, I’m using them in supplies rated to 40amps.

Does what it needs to as a meter, and is a good fit in my installation. In my case that's in the consumer unit in an outbuilding that I wanted to know the specific electricity usage for. Fitting was OK, but per the photo I did need to bend the consumer unit's bus bar a little as the screw terminal locations in this meter were staggered relative to the standard MCBs to be fed from it. The screw terminals are of course also eccentric across the meter as there are two side by side in the 1U width meter, and they're also thinner than the bus bar was. Not insurmountable in this case, but perhaps a differing standard somehow. As far as the meter in use, it works perfectly (as far as I can tell for accuracy anyway) and has been very handy.

Great

Connected with 6mm cable to a 32A single phase socket for an EV charger. The unit melted within 2 months. Not fit for the amperage advertised. Cable connections look good. The burning appears to have started internally.

fits perfect as same size as a standard breaker

Good product