I recently bought a Bluetti Elite 200 V2 and noticed that the fans behave somewhat strangely compared to my other power stations. In particular, I noticed two main issues:
- Pulsating Sound: During low loads, the fans produce a pulsating, rhythmic sound rather than a regular fan hum. It’s still quiet, but the sound characteristic is concerning. Here is a recording: Vocaroo | Online voice recorder. This sound is most pronounced during low loads and changes to regular fan hum during AC turbo charging. I’m not sure if this is a “feature” of the PWM implementation in this unit or a fan bearing issue.
- Constant Operation: The fans are always on during battery discharge, even during low loads (100W). They only stop when the battery is fully charged and the AC input is connected (UPS mode). They do change speed based on load.
I would appreciate it if other Elite 200 V2 owners could weigh in on whether they experience this, or if @BLUETTI_CARE could clarify if this is normal.