Enquiries are handled individually. We identify the specific component from the serial and confirm what can be supplied, and by what route, before anything is committed. No standard delivery lane or timescale is published for this destination, because a published figure would imply a consistency we are not in a position to promise.

Worse for the power supply, which is the part most people find surprising. A clean interruption is a defined event: the unit stops, the battery takes over, and nothing is stressed. Sustained low voltage is not an event at all — the supply stays online and works harder to hold its output steady, drawing more current, running hotter, and ageing the whole time.

Because from the operating system upward everything is normal. The voltage is being maintained, the machine is serving users, and no threshold has been crossed. The damage is thermal and cumulative inside the power supply, and it reports nothing until the unit fails outright — usually some months later, and usually blamed on age.

It removes it only if it is genuinely regulating rather than simply standing by. A unit that passes mains through while voltage is merely low, rather than correcting it or switching to battery, hands the same sagging supply straight to the equipment. Whether yours regulates under-voltage is worth establishing rather than assuming.

Power supplies first and in quantity rather than singly, because the whole population in a room is being aged at the same rate by the same condition. Then the array controller battery, which is consumed by any pattern of repeated transitions.