this post was submitted on 23 May 2025
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Home Assistant is open source home automation that puts local control and privacy first. Powered by a worldwide community of tinkerers and DIY enthusiasts. Perfect to run on a Raspberry Pi or a local server. Available for free at home-assistant.io

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Energy usage clamp meters (feddit.uk)
submitted 1 week ago by GreatAlbatross@feddit.uk to c/homeassistant@lemmy.world
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As I'm currently doing a re-wire, it's a great opportunity for me to put some metering in the house.
I'm single-phase, but I plan to monitor multiple sections of the house, which are each wired for 100A independently.

I'm currently eyeing up either the Shelly Pro 3EM – 120A or the 50A.
As it will fit nicely in the consumer unit, and supports Ethernet.

I previously looked at the Aeotec clamp devices, but they seem to be difficult to find with multiple 100A connectors.

Emporia Vue was also a consideration, but I'm always a little hesitant to buy products that require custom firmware to even work properly, when others are available. And I'd also like to avoid using 2.4Ghz wifi for connectivity.

I'd love to hear any experiences people have had with similar devices, good or bad. And how the integration with HA went.

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[–] GreatAlbatross@feddit.uk 2 points 1 week ago (5 children)

Ah, brilliant. In that case, I may have the confirmation to make the order.

It's just a shame the 120A is so much more expensive! £70 vs £120.
As there is a low chance I'll be pulling more than 50A on a circuit, but I know it'll 100% happen one day if I cheap out!

[–] pipe01@programming.dev 1 points 1 week ago (4 children)

Yeah the bigger toroids are quite expensive, you can always buy just the toroids by themselves later on though, I think Shelly even sells them separately

[–] GreatAlbatross@feddit.uk 1 points 1 week ago (1 children)

They only seem to sell the 50s separately, which is a shame. £50 worth of calibrated iron, hooray (!).

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