Shelly EM has a CT clamp that can be put on the main tails from the ESB meter to the fuse board this can be done in side the fuse board and the Shelly EM also needs to be wired to the mains. I have mine wired to the MCB/RCD/RCCB that feeds one of the lighting circuits in my house
For ESB, after trying to get data from ESB itself and process it in HA via InfluxDB+Python I turned to Frient device which works great for the Smart Meter used in Ireland by ESB Networks, it worked out of the box and super easy to install, uses ZigBee (so needs Zigbe2MQTT) and battery last 2 years
In situ:
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This looks to be exactly what I want, have you had any issues with accuracy? the device reading missing usage?
Its seems extremely accurate over 2 weeks in now - I turn a 1800Kw oven and its reflected within seconds (it checks every 5sec) - Highly recommend - about 50e on Amazon UK
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Think I will go grab one. I current have my zigbee network using ZHA though. I don’t particularly want to change that but I do see others have used it with ZHA. Did you have to configure the pulse rate?
As I was looking into how to get the grid energy usage data and I stumbled into another way:
If you have an EV charger with a HA integration you might have an entity that shows the power you received from the grid.
I have a Hypervolt EV charger and it comes with a lot of power entities (in W) (Grid, Home, EV, generation). I used the “Grid Power” entity and the Integral sensor integration (see docs) to convert from W to kWh so it can be added to the Energy dashboard.
This is my configuration:
This looks brilliant and exactly whats needed. You didnt have to get ESB to enable anything did you?
Out of intererest. How are you using the information, are you able to add it to the HA inbuilt energy integration. Im going to be soon going down the route of Solar PV and a few months of info / data like this collected would be amazing…EDIT(UPDATE): Got it, installed it, very easy and now getting loads of data and playing around with it in HA. Very cool. I have to wait a day or two for some data to get data points and info, but its coming together nicely.
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Sorry for delay in replying! Yes I have it as my total consumption in the HA Energy monitor!
I’m in Ireland and although we’ve had a Smart Meter for about 7 years just got notification that they want to come a replace it (next week) claiming its not reliably reporting. Seems strange as when I check the ESB site I can see all the readings there!
I currently use the Frient monitor mentioned above and it works great, but I’m going to ask the engineer when they’re here about the P1 port as we’re past the proposed Q4 2025 rollout for enabling that now. I’ll report back if I hear anything.
How did you get the day/night/peak split?