dougND

Still appreciated! I'm coincidentally working on ours just recently for some custom python scripts and will see if i can fit this in. We tried swapping out for a newer Legrande UPS awhile ago but it wouldn't work with this NAS540 at all so we're back on APC as well.

It's not so much a question of what device's responsibility it SHOULD be to be logging and relaying errors as always it depends on the customer's network. Critical error notification emails are a feature here so the customer is trying to utilize them, that's all. To be specific, this isn't a case with a power server at…

yes, latest firmware and yes, the log severity of these events is notice versus higher like alert or critical.

I don't think you understood my post, these are in fact errors subsequent to communications with a UPS over USB. "Battery power exhausted" is from the UPS. It's an error the NAS logs as category 'notice' instead of 'critical'. Due to that, there will be no email notification of this VERY SERIOUS state/condition.