New firmware AC300

Product Discussion BLUETTI Apex & AC Series
1

I recognize availability of new firmware for AC300 - regarding ARM and DSP.
ARM 4037.05 → 4037.07
DSP 4036.10 → 4036.30
What are new features and/or bugs fixed in these versions?

Regarding firmware update: do I need to interact with the AC300 system via touch display or can I drive the update 100% from bluetti app? Background of the question is that actually the display is malfunctioning - support is contacted for repair.

2

To apply the firmware, you have to access the AC300 only with the Bluetti app with Bluetooth. The system will continue to operate but you will lose communications, and must access by Bluetooth again. Then, if you are using it, access the AC300 by WiFi.

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@FrankH The ARM mainly solves the problem of the touch screen sometimes not being able to turn on the DC/AC, and it also added the “grid self-adapting” function (this is reflected in the APP);
The DSP optimized the charging strategy and added the grid self-adapting function.
And Raymond has already answered how you do firmware updates.

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Can you tell us more about what the grid self adaptation mode actually do? Is there a downside of using this? Wondering why is an option, and one that is defaulted to off? Under what situation do we don’t want to use it?

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@snowstorm

Grid Self-adaption Mode:

  1. Application Scenario: This mode is designed for weak grid environments where voltage fluctuations and frequency deviations are common. It can be enabled when AC charging is unavailable due to high grid voltage or low grid frequency faults.
  2. Principle: Grid Self-adaption Mode relaxes the input voltage and frequency range and extends the protection time, allowing normal charging operations. During brief voltage drops, the machine typically assumes a grid outage and issues an alarm. However, with extended protection time, it allows the grid to stabilize, minimizing disruptions to the charging process.

Summary-

  1. When the power grid is unstable, enable Grid Self-adaption, and the UPS will switch slowly.
  2. When the power grid is stable, disable Grid Self-adaption, and the UPS will switch quickly.
6

Thanks. So when grid self adaptation mode is in use, the Bluetti will widen its tolerance of grid input (e.g. voltage, frequency, waveform etc…) and keep using the grid even if it is imperfect. But UPS switching time will be worse and may not switch to battery in <20ms if grid actually fails.
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In Grid Self Adaptation mode, would the imperfect grid power still be passed through to the loads? So say grid voltage drops from 110V to 100V, would the AC output also drop to 100V? Or if the frequency changes from 60Hz to 55Hz, would the AC output of the Bluetti also drop to 55Hz? In normal mode, would the situation be different?
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One thing you may want the tech to look into is to auto recover the grid input if it fails. If the grid is usable but unstable, my Bluetti AC300 would disconnect from the grid as soon as there is a grid issue but would never resume without manual action. It would be good if it would periodically check say every so often, say (30s, 1m, 2m, then every 5 minutes). “Auto grid connection recovery”

7

Yes, generally when connected to the power grid and the machine is carrying a load, the load is carried by the power grid bypass. So it is equivalent to the load being directly connected to the grid.

If the grid is indeed in poor condition, the machine will automatically disconnect from the grid. Of course, if the grid returns to normal, it will also automatically reconnect.

8

Thanks for the info.
Based on what I remember, I don’t recall that it automatically reconnects to grid once grid power becomes stable again. It seems to lock out the grid once an off-spec situation was detected. This was on an old firmware before the self-adaptation was introduced, so things may be different now.