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Date:      Mon, 3 Sep 2018 21:33:40 -0500 (CDT)
From:      "Valeri Galtsev" <>
To:        "Chris Gordon" <>
Cc:        "C Gray" <>, "FreeBSD" <>
Subject:   Re: APC UPS BackUPS Pro (BX1500M)
Message-ID:  <>
In-Reply-To: <>
References:  <> <> <>

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On Mon, September 3, 2018 8:19 pm, Chris Gordon wrote:
> I’m using apcupsd (installed via pkg) and have it set to gracefully
> shutdown my machines when the battery is nearly drained.  A couple of
> weekends ago, we had the power go out at night and my machines shut
> themselves off gracefully as expected.  Of course, I had to bring them
> back up manually when I got up, but I would prefer this than having them
> go down hard on a power outage.

To solve this last trouble I configure since forever in BIOS power ON
after AC power is returned. Usually if UPS has drained battery, after
power returns, it powers itself ON, provides power to outputs and starts
charging battery. We had this situation once, outage longer that UPS's on
battery run, and all came back on as expected. That said, if you have
several groups of machines, you may want to have UPS for most important
group "overspec'ed", say 3 kVA UPS for merely 500 VA consumer. The last
will increase on battery run by a factor of 6 at least, in fact even
larger, as rechargeable batteries give somewhat more under less stressful

We used APC UPSes with apcupsd, and the last can work in master mode
(getting data about battery from UPS) and in slave mode, getting signal
for shutdown from master daemon on different machine. This way you deal
with multiple machines behind one UPS.

I hope this helps.


> Your situation may vary as to what you consider the appropriate response
> and recovery process for your machines, but I’ve had apcupsd do what I
> told it and automate the low battery shutdown.
> Chris
>> On Sep 3, 2018, at 9:00 PM, C Gray <>
>> wrote:
>> My experience says "yes" but with the following qualification: the
>> power-source goes to the APC input, and the computer (or other devices)
>> plug into an APC output. The APC will supply power with its battery no
>> matter what the device or OS, however, the sum of "drive"-current
>> determines the rate of battery dissipation. I chose the 1500-watt model,
>> APC Pro-1550-S.
>> The lameness comes when the software may or may not auto-save, because
>> that entails the OS.
>> I use my APC as an intermediary between a solar-panel powered battery
>> which is used for the refrigerator, full-house water purfcation system,
>> and my technology room's separate circuit outlets. I plugged in my main
>> WAN computer, my ham radio, my Dell server, and a few USB hubs used for
>> distributing disk-space specific-topic hard-drives and their BU
>> hard-drives.
>> If the battery gets fully drained at night, then the APC kicks in, and
>> alarms me so I can turn off processes and systems gently.
>> If you have the right OS (and I think they narrowly only support
>> Windows, then the APC will suffice for the period for which it is built,
>> but no longer. You will need to complete the shutdown process yourself.
>> My answer is a bit general, but then so are quality assurance and specs
>> these days....
>> best and good luck,
>> chrisg
>> On 03-September-2018, at 00:40 PM, Carmel NY wrote:
>>> I was wondering if anyone has any experience with an APC UPS BackUPS
>>> Pro (BX1500M) unit? I have an opportunity to pick up one for virtually
>>> nothing if I want it. I am just not sure if it will work with FreeBSD.
>>> --
>>> Carmel
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Valeri Galtsev
Sr System Administrator
Department of Astronomy and Astrophysics
Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247

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