In my last post, I described how I built my lovely (and massively overpowered) network UPS system. But it was missing something: a way to monitor the charge of the UPS. In principle, you’d use this information to tell equipment when it needs to gracefully shutdown.
In practise, I’ve tried to avoid ever needing to shut down equipment by sizing it such that it can cope with any likely outages, but given that … read more.