external meter with Deye instead of CT

[mateusz1945]

whatever Deye cloud ( and home assistant using deye data) calculates is is off by like 2kwh a day. (pea meter spinning disc meter showing more consumption)
i wonder if its worth to add meter like chnt ddsu666 (seen on aliexpress for like 15$)
- would it calibrate deye calculations? also i dont want to look outside at the meter every couple of days , neighbor looking at me funny 

* i already tried to change CT ratio settings  to calibrate it up and down and still error is the same,

[Crossy]

The Deye CTs are horribly inaccurate.

 

You can improve that accuracy by using an external meter, but there are only a few that work with the Deye (check your manual), doing this certainly improves the zero-export accuracy. This meter (not cheap) definitely works with the Deye 

https://www.lazada.co.th/products/i4470648921-s18041805611.html?

 

We also have a number of Hiking DS238-2 energy meters monitoring various stuff. These have RS-485 for remote reading, sadly they don't talk to the inverters.

 

In reality, the only meter that actually matters is the PEA one, the others are purely an estimate unless they are calibrated and certified.

[Bandersnatch]

2 hours ago, mateusz1945 said:

whatever Deye cloud ( and home assistant using deye data) calculates is is off by like 2kwh a day. (pea meter spinning disc meter showing more consumption)
i wonder if its worth to add meter like chnt ddsu666 (seen on aliexpress for like 15$)
- would it calibrate deye calculations? also i dont want to look outside at the meter every couple of days , neighbor looking at me funny 

* i already tried to change CT ratio settings  to calibrate it up and down and still error is the same,

 

I am quite happy with my Zemismart sensor, it seems pretty accurate as far as I can tell, but I don't have a PEA meter to compare it with.

 

I have started a discussion about smart home kit:

 

 

 

[lom]

5 hours ago, mateusz1945 said:

i already tried to change CT ratio settings  to calibrate it up and down and still error is the same,

The Deye inverters uses grid power themselves and that is not included in reported grid import, I guess they have their internal CT's in the wrong place..😉

I have 0.3 KWh grid import a day according to Deye but PEA's smart meter says 1KWh a day.

I can get rid of the ghost import if I run off-grid but it comes back as soon as I switch to on-grid mode which activates the grid relay in the inverter and I guess that is what is responsible for the ghost import.

 

Edited November 1 by lom

[KhunLA]

On 11/1/2024 at 8:30 PM, lom said:

The Deye inverters uses grid power themselves and that is not included in reported grid import, I guess they have their internal CT's in the wrong place..😉

I have 0.3 KWh grid import a day according to Deye but PEA's smart meter says 1KWh a day.

I can get rid of the ghost import if I run off-grid but it comes back as soon as I switch to on-grid mode which activates the grid relay in the inverter and I guess that is what is responsible for the ghost import.

 

Mine is also about 0.3kWh a day, as PEA bill shows 9-10kWh a month, and we don't use it for anything, except the MG wall charging cable, which is rarely used, and the only thing on the grid.