The problem seems to be with negative energy flow (from solar panels). The installed smart meter is CHINT DDSU666 from the Teltonika supported meter list, which shows a negative energy flow (with a minus) during solar generation. However, the TELTOCHARGE EVC101 interprets the negative energy flow as positive (seems to lose the minus). This is visible in the TeltonikaEnergy app > settings > diagnostics > import/export from/to grid. In this case, the more energy that comes from the solar panels, the lower the maximum current allowed, i.e. reducing the possibility of using Dynamic Load Balancing.
P.S. Everything works fine with positive energy flow (from the grid).
Any ideas on how to solve the problem?
Update:
During the EV charging, I get an error “kWh meter faulty wiring”. However, according to the wiki, all the necessary wires (A, B, com) are connected at both sides according the wiki and meter + load balancing from the grid work fine. Charging is in ECO mode and doesn’t measure consumption and power.
Troubleshoot file
Please help
[2024-08-10 14:16:43] Discrete [29] Energy meter UI unidentified: warning APPEARED.
This essentially means the meter is unsupported. I believe you have checked our wiki page. Which smart meter are you using?
If you are using the same smart meter for solar and kWh, that could be the issue. You cannot use the same smart meter for both the inverter and the charger due to a Modbus conflict.
Could you give me more information about the installation?
Best regards,
Furkan
I have checked the wiki and chose DDSU666 from Teltonika’s supported meters list. The specific link with the description of where I bought it is here.
For the solar power plant, I am using another 1-phase smart meter from Acrel.
Hello Darpu,
DTSU666-H, which is a smart meter for huawei inverters and we didn’t implement any support for -H one.
Hello Darpu,
Our rnd team will implement DTSU666-H, I will inform you when its done
That would be great. Thank you very much!
Hello Darpu,
furkan.akinci@teltonika.lt
Please reach me
Are the DTSU666-H now supported?
Hello,
The DTSU666-H specific model is not supported yet, the same as the DTSU666-X. Both of them are white-label versions of the standard DTSU666, which we do support.
The issue with adding these models to our supported list is the same: internally, their data and communication are the same as the standard DTSU666. This makes it impossible to detect which model (-X, -H or stock) is installed. At the same time, they use a different conversion rate compared to the standard model, which makes the data used by our charger incorrect. For example, the stock meter registers for current are raw values, meaning they are not scaled by the CT ratio. For the -X and -H versions, the values are scaled. This is also present for active power measurements. Due to this, we can’t distinguish between different models, as we can’t know the expected values apriori.
The DTSU666 smart meter that we support is the most commonly used version, which is why we continue to support this device.
If the smart meter manufacturer provides a way to detect which smart meter configuration is installed, we could consider supporting these models. However, for now, they are not supported.
Sincerely,
Dominic