Which is the lowest serial number that can be upgraded with the new firmware? Post it here so any AC300 owner can determine if their units can take that firmware.
Looks to me like if the ARM Version is 4037.** then you can update and if it’s 4032.** then you can’t. I haven’t seen any other ARM versions on the forums although the sample size is small. 
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Hi @Raymondjram, Thank you for your concern about this issue.
@Sideeffect’s explanation is correct.
Currently, only ARM versions starting with 4037 can enable this function through firmware pushing. Other versions cannot be updated yet.
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May I ask please.
Is there a ‘System switch recovery’ upgraded firmware
available for an AC500 I just bought…
Or is it already a feature?
Thank you
(it is important)
(Didn’t get a reply/didn’t buy it, after all)
Dear @BLUETTI_CARE
This is great news, I’ve been requesting and waiting for this feature for years!
Please find attached the information about my AC300.
Thanks!
Hi @sebastian.stumpf, you are welcome!
Now I have applied to upgrade your system to our IT department. They will push the latest version of firmware to your unit in 24 hours.
Please upgrade the firmware tomorrow. Please do not load any device when upgrading it.
Please let us know if it works.
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Hi @sebastian.stumpf, that is great!
Thank you for the update, and we’re glad to hear the good news! I’ve also shared it with the technical department, and they are equally delighted.
Can you tell me that AC300 units with ARM version 4032 will eventually get this feature? I bought mine new just last year, so surprised if it’s already unsupported for such a critical feature. Thank you.
Hi @ChickenLips, Thank you for your attention to this matter. However, your AC300 version does not support the System Switch Recovery function. We regret that we couldn’t be of more help.