Can CT coil be calibrated?
Hi All
We have had to install the CT coil about 25M away from the inverter at my installation for various reasons. We have used high quality twisted cable and made sure it is away from all interference. We have set inverter to Zero export to mains and cycle batteries using system mode.
I recently noticed that when the inverter reads +- 0W at CT "on screen" in reality there is about 200W flowing at CT coil. The "zero export power setting" is set at 20W as my meter is not sensitive to a little back flow. I noticed in settings there is an option to adjust the CT coil ratio. Standard setting is on 2000 at the moment.
Is there a way to calibrate the reading at inverter to adjust for this 200W?
What are my options to resolve this issue? per 24 hours we lose a fair bit of power the inverter could have "processed"
Interestingly my ct coil that was fitted is a 100A/33ma which is 3000:1 ratio. I suspect that I should change it out to a 2000:1 ratio ct coil to improve the resolution.