Safe Shutdown procedure

we are considering to buy Balena Fin for an industrial application. We use Raspbian as OS.
Since the Balena Fin is installed inside an electrical panel, when we turn off the panel the Balena Fin is instantaneously unpowered.
My question is: can we be confident that such shut down doesn’t damage the boot sector or in general part of the program memory so that at next power-on the board starts working properly? Otherwise should we provide with some device, like for example a small UPS, in order to grant the proper shutdown procedure?

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I would expect the Fin to be fine in such a use case, but not so much for Rasbian which can get really messed up if the device is powered off at the wrong time. I’m sincerely not trying to sell you anything here, but this sort of use case is exactly what an operating system tailored for edge devices like balenaOS is meant to solve.

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Raspbian must be formally shut down to prevent corruption of the SD card.

Likewise, you should use tune2fs to set a max mount count and max interval between forced fsck’s.

A small UPS is an excellent idea.

You can configure Raspbian to allow SSH access for maintenance and to formally shut it down when you need to take that box totally off-line.