WTB - Current Sensor - DIY Energy Monitor

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dryburn

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Ultimate Geek
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#282611 1-Mar-2021 13:24

Hi Geekzoners,

Looking at doing a DIY energy monitor system and before ordering a Current Sensor / CT sensor from overseas and taking weeks to arrive. Does anyone have one that is unused and willing to part with it? Looking for three SCT-013-100 sensors

NZ store has one for $20 but think that is way over priced

Also any recommendations for alternatives or proven Arduino or Raspberry Pi projects to look at

edit: sensor model

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501 posts

Ultimate Geek
+1 received by user: 49

#2666281 1-Mar-2021 14:48

You'd be better served by just using a current sensing Shelly? Great app and reporting along with IoT integration if needed.

https://shop.shelly.cloud/shelly-em-50a-clamp-wifi-smart-home-automation-1#139

RS820+, DS223, CoreELEC on Odroid N2+, 3 x Echo Dot & 7 x Google Homes connected to Home Assistant on Beelink SEi12.

sudo

409 posts

Ultimate Geek
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#2666291 1-Mar-2021 15:16

Which plans are you using for those sensors?

xbmcnut

501 posts

Ultimate Geek
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#2666305 1-Mar-2021 15:36

sudo:

Which plans are you using for those sensors?

Sorry, don't understand your question.

RS820+, DS223, CoreELEC on Odroid N2+, 3 x Echo Dot & 7 x Google Homes connected to Home Assistant on Beelink SEi12.

dryburn

440 posts

Ultimate Geek
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#2666329 1-Mar-2021 16:18

My plans were to measure the energy usage at my home.

Measure mains, hot water and septic tank(used a Clampmeter to measure but seems pretty high)

xbmcnut thanks for the recommendation, it looks really good. Do you know of any other options that don't use wifi? I was planning on measuring via ethernet on raspberry pi

olivernz

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#2666632 2-Mar-2021 09:55

xbmcnut:

You'd be better served by just using a current sensing Shelly? Great app and reporting along with IoT integration if needed.

https://shop.shelly.cloud/shelly-em-50a-clamp-wifi-smart-home-automation-1#139

^^ What's the best way to obtain those in NZ?

dryburn

440 posts

Ultimate Geek
+1 received by user: 92

#2666646 2-Mar-2021 10:24

Had a look and it's 10 usd for shipping. no clue of expected delivery time

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xbmcnut

501 posts

Ultimate Geek
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#2666741 2-Mar-2021 11:49

dryburn:

Had a look and it's 10 usd for shipping. no clue of expected delivery time

My last two shipments took around 2~3 weeks with COVID slowing things down.

RS820+, DS223, CoreELEC on Odroid N2+, 3 x Echo Dot & 7 x Google Homes connected to Home Assistant on Beelink SEi12.

xbmcnut

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Ultimate Geek
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#2666743 2-Mar-2021 11:54

dryburn:

xbmcnut thanks for the recommendation, it looks really good. Do you know of any other options that don't use wifi? I was planning on measuring via Ethernet on raspberry pi

I'm using one of the MODBUS energy meters here https://s.click.aliexpress.com/e/_dVaddXe for my whole house monitoring and connecting that to a USR-TCP232-410S for MODBUS to Ethernet conversion then into Home Assistant for reporting.

RS820+, DS223, CoreELEC on Odroid N2+, 3 x Echo Dot & 7 x Google Homes connected to Home Assistant on Beelink SEi12.

landcruiserguy

775 posts

Ultimate Geek
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#2666810 2-Mar-2021 15:24

The kogan brand smart plugs (smarterhome) are $50 for a pack of four and they include energy monitoring in the plug. Simple and cheap.

xbmcnut

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Ultimate Geek
+1 received by user: 49

#2666826 2-Mar-2021 16:21

landcruiserguy:

The kogan brand smart plugs (smarterhome) are $50 for a pack of four and they include energy monitoring in the plug. Simple and cheap.

He wants to do 80A whole house current monitoring. A smart plug won't work for that but thanks for the tip. I'll look into those for other use case scenarios.

RS820+, DS223, CoreELEC on Odroid N2+, 3 x Echo Dot & 7 x Google Homes connected to Home Assistant on Beelink SEi12.

dryburn

440 posts

Ultimate Geek
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#2666827 2-Mar-2021 16:21

Looking at measuring total home usage from the meter box

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shanes

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#2666855 2-Mar-2021 17:30

xbmcnut:

I'm using one of the MODBUS energy meters here https://s.click.aliexpress.com/e/_dVaddXe for my whole house monitoring and connecting that to a USR-TCP232-410S for MODBUS to Ethernet conversion then into Home Assistant for reporting.

Did you have any issues getting an electrician to install that? Guessing the CT wouldn't be an issue, but powering the device?

xbmcnut

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Ultimate Geek
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#2666906 2-Mar-2021 18:13

shanes:

Did you have any issues getting an electrician to install that? Guessing the CT wouldn't be an issue, but powering the device?

No issue. Similar device to what most solar companies are installing these days. Device is self-powered by the line.

RS820+, DS223, CoreELEC on Odroid N2+, 3 x Echo Dot & 7 x Google Homes connected to Home Assistant on Beelink SEi12.

Yoban

453 posts

Ultimate Geek
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#2667171 3-Mar-2021 09:28

A great tutorial on install and adding to Home Assistant using ShellyForHass plugin https://www.youtube.com/watch?v=BsjP_TlzSe4

Had to chuckle when he says "hopefully no smoke" as he flicks the main switch in the switch board/breaker box.

networkn

Networkn
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#2667172 3-Mar-2021 09:31

Is there something in a box plug and play based off the shelley thing?

I'd like to be able to monitor whole house, and individual items (I understand 2+ devices required)

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