I don't know how old your model is but I found this covering older models :
Hi just a warning don't flash the SPF 5000 ES with the latest firmware as the chip and board has changed on the the newer model...which has the latest update July 22 for it.older models the firmware version number s start with 40. .....41. . the newer inverter model starts with 61 or 67 that's ho...
powerforum.co.za
The poster in that says :
Posted August 4, 2022(edited)
Hi just a warning don't flash the SPF 5000 ES with the latest firmware as the chip and board has changed on the the newer model...which has the latest update July 22 for it.older models the firmware version number s start with
40. .....41. .
the newer inverter model starts with 61 or 67 that's how you tell the difference.
for the old versions like mine there is only a febuary 2022 firmware update.
I take no responsibility for the updates and / or failure. you do it out of your own volition and accept the consequences (bricking) of a failed update!
if it's not broke don't fix it is best policy.
Here is the link to the files he is providing :
drive.google.com
I'm attaching the firmware he is referencing as being for the old inverters. I don't know if its safe or not its just what he provided in that link.