Input power monitoring

Hi,

I experience spontaneous reboots, about 2 times a month or so. I could not yet identified the source of these reboots.
Because I’m using a non-standard power supply (it’s a meanwell battery-backed one), I’d like to check if it provides a continuous power.
Does Turris Omnia have any built-in tools to monitor its input voltage, or I need some external hardware for that?