Hi
I am trying to set up my emonpi with 2x CT probes to monitor my electricity usage and solar production etc. Initially I just want to record imported electricity levels to get this working.
I have solar PV and 2x enphase batteries.
I purchased 2x of these for the CT probes: https://www.digikey.co.uk/en/products/detail/seeed-technology-co-ltd/101990029/5488226?s=N4IgTCBcDaIIwFYCcB2AtHAzABnQOQBEQBdAXyA
For the purposes of testing, I have put one CT probe on the live and one on the neutral of my live feed into my supply meter. Photo attached.
If I remove the CT probes from the mains, they report ~0kw (around 25w in fact)
I have issues/discrepancies between what the enphase app is showing me for elec imported/exported versus my emonpi. Both sets of data are attached.
I ‘trust’ my enphase stats as the import stats match my meter readings, and when enphase shows I am not importing(or exporting) I can physically see the feed meter not blinking.
The issues I can see are:
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Altering the orientation of the CT clip doesn’t change the +/- of the feed. Both the live and neutral always show a + number
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When the system is exporting it still shows a positive number on both CTs
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At night when there is little activity in the house (say 3am) emonpi reports usage of 700w. Enpahse reports 300w.
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During the day when it was sunny (as today) emonpi is reporting significant importing, when the actual number is near zero.
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Emonpi never reports importing less than around 700w, unless I remove the CTs (which I did at 9.40am to test)
I;d be grateful for any advice for how to diagnose this issue!
Thanks
Will
Empnpi screenshot
Enphase screenshot