On Tue, Jan 3, 2023 at 8:18 AM Gennadiy Poryev via Nut-upsuser < [email protected]> wrote:
> May be, I don't know. My UPS doesn't autopower on after charging its > batteries full. > > Anyway how do I test it? There has to be some specific way of shutting > down to see if that works or not. > ... > The problem is getting UPS to turn on the load as soon as power mains > returns. Servers will start automatically. If a way to do this with my > model is discovered, I will modify my daemon to use it instead of just > load.off.delay'ing. >> >> So, where do I look/dig ? Or is this a dead end and I better buy other >> UPS model with an actual support? >> > Well, if buying is an option - maybe that would be a reasonable variant at the moment, although there are a few more ideas to try first. According to https://www.apc.com/us/en/faqs/FA158943/ "all APC Back-UPS" models should auto-restart when charged, "independent with PowerChute software either installed or not". So if yours does not, it may be defective or have some different wiring/firmware/other internals that make it deviate from the FAQ. Recent decade's worth of APCs are also unfortunately known for very rudimentary data/control support over USB HID protocol, promoting MicroLink or ModBus over USB cabling, but nobody has yet contributed NUT drivers for that. So on one hand, if you can source APCs older than approx 2010 - they might work better (ones we had were pre-USB, with serial connections for Back Pro's, and also SNMP cards in rack models - so different drivers and different data model inside the device controller). But you may have issues with expired batteries (PbAc's last about 3 years), dried-up capacitors, etc. On another hand, there is the "apcupsd" project with allegedly better support than NUT currently has for modern APC protocols, as much as their last commits happened 6 years ago (I've recently posted an idea that maybe NUT should absorb it somehow - both are GPL). The two projects grew from similar roots, and NUT has long provided an "apcupsd-ups" driver as effectively a relay from apcupsd daemon to NUT ecosystem. Distro packaging was reported flawed, making the two packages "conflict" per metadata on some OSes, but custom-compiling the original projects to install side by side should still work. This is another vector you might try - at least to see if that project does support your UPS better, and prove or disprove whether the device itself supports an auto-poweron setting... maybe would suffice to toggle it once and come back to NUT :) Also if you have a machine that can run APC PowerChute - it could also help with this part of diagnostics and/or setup too. Hope this helps, Jim Klimov
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