Elite 300 error 069

I’m getting an error code 069 on the elite 300 when my DC to DC charger is activated. How can I fix this

What is the model of the DC to DC charger? What input/voltage range did you set? Double check the cables. Sounds like the Bluetti does not like whatever parameters you set on the DC to DC charger OR it doesn’t like the unit itself (too noisy). Make sure the output of your DC-to-DC charger matches what the PV input of the Bluetti supports (what is your voltage + current set to?). The Bluetti Elite 300 expects a certain “charging profile” so not all DC to DC chargers are created equal. Any input stability could result in that internal error code being thrown.

Etaker pro 1000…48 volts and 390 watts. I checked all the cables and they look good. I used the charger lasr week camping on my Bluetti p200 with no problem…