I noticed some odd behavior on the Bluetti AC500 recently and wanted to see if anyone else has observed the same thing or may be able to provide an explanation. The last two times I have had the solar panel hooked up to the Bluetti AC500 (solar panel is PV420), I noticed that the reading of the PV input from the panel would go from reading an accurate input (ex. 330 watts) to showing 0 watts (same conditions - full sun and no clouds) and would stay there for two seconds or so before rebounding to the wattage it showed before. At first I thought it might be a loose connection somewhere between the panel and the AC500 but everything was confirmed to be secure. Then I realized that it was doing this on a pretty regular basis (about every 4 minutes) so the pattern would lead me to believe it may be a firmware issue. I have seen it happen in two different sessions (one on the DC1 leads and one on the DC2 leads). I recently upgraded the firmware due to another issue I was encountering with one of the B300S batteries. I am now showing firmware version IoT v9041.10, ARM v4044.07, DSP v4045.30. Thanks in advance for any input.
Hi @Pilotstt, Could you please let us know the SN code of your AC500, its current BMS version, and which country version it is?
We would like to push the latest firmware to you, and please test it after the upgrade.
In addition, could you take a video, upload it to a cloud drive, and then share the link with us? This will help us further analyze the problem.
Thank you for your response. I will be glad to send you the serial number information and a video but would like to do so off of the forum. Is there a way to reach you directly regarding this matter? Thank you.
Hi @Pilotstt, You are welcome.
I will contact you later via private message.
We will follow up on this matter.
I wanted to provide an update on this for anybody interested. Bluetti reached out regarding the issue and asked for some additional information in an attempt to assist. In attempting to get more information, I attempted to charge the unit with solar again and the problem did not occur (everything worked fine). There were several differences with this charging session including more stable solar conditions (more time with full sun and fewer clouds), the AC500 unit being in an area with a little more ventilation around it, and the charging cables from the solar panels resting on the ground rather than being suspended in the air going to the AC500. I will continue to monitor the situation to see if this issue is encountered again in the future and will post any additional developments. Thanks to Bluetti for reaching out.