AC180 Excessive fan speed and noise while powering small loads

Hi @lavash_bluetti, The advantages of the new DSP are:

  1. It optimizes the issue of frequent PV charging relay switching in low light conditions.
  2. It relaxes the charging voltage for the grid-enhanced mode, allowing compatibility with a standard voltage input of 70%-130%, enabling more generators to charge.
  3. It resolves the random shutdown issue after fully charging.

We have confirmed that the new DSP will not affect the turn on time, but the BMS might. However, we noticed that you haven’t upgraded the BMS recently. Therefore, we suggest you record a video, upload it to a cloud drive, and share the link with us to check if everything is functioning normally.

Hello @BLUETTI_CARE . Thank you for the information about the changes in the DSP.
I don’t quite understand which BMS is outdated. At different stations I have (in brackets the number of stations with this version) v1033.12 (1), v1052.02 (2).
I recently checked for updates on all of them and none of them had information about the update.
With the BMS version v1033.12, the AC180 station number 2313000365676. This is the one that does not turn on when it is charged to 100%, turned off, but connected to a 230 volt network.(it was connected to the network before turning off the button).

Another station also does not turn on, but it is completely new. And it works without any problems at all. Judging by the software and the number, the release is 2024 (IOT v9046.01, ARM v2124.02, DSP v2126.02 BMS v1052.02).

And what video do you want to see? If the station turns on by itself? Then everything is simple there. The station is charged 100%, turned off, but plugged into a 230 volt outlet (it was connected to the network before turning off the button)… After different times, the station turns on by itself. I can shoot if you confirm the need.

“After different times, the station turns on by itself. I can shoot if you confirm the need.”

Came here for same problem, station works in bypass state from AC, turns on the fans by itself each 1-2 hours, yesterday accidentally the display was enabled and i saw the input wattage 350W, while the output was 60W and station working in by-pass UPS mode. We have some problems with power leakage, ladies and gentlemen

AC180P2352000424649
ARM v2089.03
DSP v2088.03
BMS v1039.01 (Looks like i need updates for this guy)

@BLUETTI_CARE

Hi @lavash_bluetti, Your BMS version v1033.12 is the latest. For other machines, if there are no issues, there’s no need to upgrade the BMS. We only push new firmware after thorough testing.

Regarding the machine with SN AC1802313000365676, has the issue been resolved? What is its DSP version? We plan to push a new DSP to address the shutdown issue after charging.

We would like to get a video comparing the startup speed after upgrading the DSP to see if there’s any impact on the boot time.

Hi @Kostyantin, We found that your firmware version is quite recent. If there are no other issues, there’s no need to upgrade.

We’d like to know if your AC180P is connected to a power source. If it is, it will automatically activate and turn on, which is normal.

The fan turning on every 1-2 hours is also normal, as the machine detects an increase in internal temperature and activates the fan for cooling. Once the temperature drops to a certain range, the fan will turn off. Additionally, please ensure that the area where the machine is placed is well-ventilated to aid in heat dissipation.

The input power refers to the charging power of the AC180P, while the output is 60W. Apart from the load, the remaining power is used to charge the AC180P, which is also normal and does not indicate a power leakage issue. Please rest assured.

Hi @BLUETTI_CARE !
The AC1802313000365676 station currently has the following software
ARM v2074.07
DSP v2078.07
BMS v1033.12

The station works without any issues. And this station after charging to 100% and forced shutdown (pressing and holding the power button), does not turn on by itself, remaining connected to the outlet.
The other two stations in the same situation turn on by themselves after a while and this raises questions for me. They currently have the following software:
ARM v2074.07
DSP v2078.07
BMS v1052.02

Hello, the fan sometimes turns on at high speeds when the load is only up to 90wt, and it may not even turn off at all, you have to reboot the station! Began to make a lot of noise after the update!
AC180P2349001356020
ARM v2089.03
DSP v2088.03
BMS v1039.01

AC180P

Hi @lavash_bluetti, It seems that the firmware on these 3 AC180 units is mostly consistent, with only minor differences in the BMS, though this should not cause such discrepancies.

When you mentioned manually shutting down the first AC180P, and that it doesn’t automatically turn on afterward, this is normal behavior. Only re-plugging the charging cable or turning off and restarting the grid would trigger the AC180P to power on automatically.

For the second and third units, which turn on automatically under similar conditions, we want to confirm: were they also manually turned off by pressing the power button? After that, was the charging cable re-plugged or was the grid disconnected and restarted at any point?

Hi @qwerty1, This seems like normal behavior. We would like to know whether you are using AC or DC load for this 90W device.

During both charging and discharging, the internal temperature of the battery cells increases, causing the fan to automatically turn on for cooling purposes. Unfortunately, the fan cannot be manually turned off, nor can this be achieved through a firmware upgrade, as it depends on not only the load power but also the internal cell temperature and environmental conditions. We recommend placing the AC180P in a well-ventilated, cool area or using an external fan to help with cooling.

The fact that the fan turns off after restarting is also normal. The fan’s activation and deactivation have hysteresis, so after restarting, it may not turn on again.

Hi @BLUETTI_CARE !

All three stations are AC180.
Yes, all are manually switched off and the power cable is left in the socket. The voltage did not disappear and no one touched the power cable connector.
And all stations are charged to 100%.
In the ones described above, the first station does not turn on by itself (it has BMS v1033.12).
The other two turn on by themselves. At the same time, while they had DSP v2078.06, they turned on by themselves quite quickly (approximately within the first few minutes). After installing DSP v2078.07, they also turn on but noticeably later - sometimes after ten minutes, sometimes after a couple of tens of minutes. But the interval has clearly increased.
Perhaps this is due to changes in network voltage and frequency. Recently, I often see voltage in the range of 233-240 volts and deviations to the lower side in frequency up to 49.95 Hz. It may also be a reaction not to voltage values, but to voltage changes.

Hi @lavash_bluetti, Under normal conditions, if the AC180 is turned off while charging, it will need either the power cord replugged or the power button manually pressed to restart.

The delay of a few or several minutes for activation may be due to an unstable grid voltage, rather than a firmware issue.
Your analysis is correct.

Greetings. After each operation of ac180p, the time changes to the lower side, less and less, after each discharge, charge! I see it when the charging station is connected to a high-voltage network! What does it mean, and what will happen when it reaches the 0 mark?

Hi @qwerty1, Please rest assured, this is normal.
The indicator shows Remaining time indicator. When charging, it displays the remaining charging time, so the value will decrease as it charges. When discharging, it shows the remaining runtime, and the value will decrease as the battery depletes.

When it reaches 0, it means the machine is fully charged or fully discharged and needs to be recharged.