emily, blinkenlight witchOct 27
Something in my house is sucking a *lot* of energy and I would like to find it and make it stop doing that. Anyone have specific recommendations for multi-circuit power-usage-tracking devices? (I have 13 240V and 18 120V circuits across three panels, suggesting I will probably need three such devices; the most populated panel has 10 120V and 2 240V.)

Other requirements: ideally #homeassistant compatible, not internet based (currently have devices on zwave and non-internet-facing wifi, adding zigbee soon for unrelated reasons), works with normal US split phase power. Assume I am a reasonably competent electrician and am comfortable putting a current transformer around a wire.

#homeautomation
Show threademily, blinkenlight witch
oh wait what

just realized PSE bills every *two* months, which means we're only using More Than I'd Like, not Holy Shit Something Is Very Wrong Here amounts (2280 KWh over two months, not 2280 KWh per month)

I can still get into electricity usage optimization but at least it's only half as bad as I thought
Oct 27 at 5:53amWeb
Show threads0 Is Not A SysadminOct 27

@emily lol I thought my 350 kWh per month was a lot (it is for the small apartment given my server rack, but we do have gas hot water and stove)

I bought ModBus compatible DIN rail current meters and a modbus/RS422 to Ethernet adapter with PoE. That way there’s one shielded Ethernet lead coming out the back of my DB and it’s cheaply expandable, and not dependent on wifi in there.
I have one meter for the whole board, and one per aircon circuit, but I’d add more if I had more space.

I looked at this project https://github.com/CircuitSetup/Expandable-6-Channel-ESP32-Energy-Meter but didn’t have room to encapsulate it neatly in my board and run all the CTs the way it was wired.
For you it sounds pretty good, being nice and expandable.

GitHub - CircuitSetup/Expandable-6-Channel-ESP32-Energy-Meter: Hardware & Software documentation for the CircuitSetup Expandable 6 Channel ESP32 Energy Meter. Works with ESPHome and Home Assistant.

Hardware & Software documentation for the CircuitSetup Expandable 6 Channel ESP32 Energy Meter. Works with ESPHome and Home Assistant. - CircuitSetup/Expandable-6-Channel-ESP32-Energy-Meter

GitHub
Show threadDaniel CollinsOct 27
@s0 @emily I have a Shelly EM and a selection of their inline power monitors around the house, but that sounds neater. Where did you get them?
Show threads0 Is Not A SysadminOct 27

@emily these are the modbus DIN rail meters I used:

Built in CT for smaller circuits: https://www.aliexpress.com/item/1005005657459435.html

External CT, better quality: https://www.aliexpress.com/item/4000107698147.html

DIN-Schienen-Energieverbrauch Multifunktions-Wattstundenzähler 100 A RS485 MODBUS RTU 230 V SDM120 V A PF Hz - AliExpress 1420

Smarter Shopping, Better Living! Aliexpress.com

aliexpress.
Show threademily, blinkenlight witchOct 27
@s0 huh, I saw this before but somehow missed the "expandable" part and ignored it because only 6 channels

and yeah, this is a full size house + workshop with electric everything, no gas, so I expect >350, but... <2000
Show threadDaniel CollinsOct 27
@emily thats weirdly close to our ~1,200kWh/month
Show threademily, blinkenlight witchOct 27
@solemnwarning is that why i keep getting electric bills for "Daniel Collins"
Show threadÖlbaumOct 29
@emily They started doing that to me too a while ago. I was so angry from the scare they gave me.