[GRLUG] Local APC UPS Repair

[Bob Kline]

I was getting at the last sentence - a car battery
or deep discharge marine battery.

But as I recently learned, one has to be careful
about the type of battery.  A deep discharge
marine battery is made to be taken way down.
But attach one to a common inverter, and once
the battery voltage goes down a few volts the
inverter doesn't have enough overhead and stops
working.  A car battery won't be much different
if used on its own.

I suspect the actual solution will be rather more
expensive.  One could imagine two batteries in
series, with a regulator, which would then dissipate
a lot of the energy in dropping the voltage so the
inverter can use it.  Or a built in switching mechanism
that will go from battery to battery.

Of course UPS's are really designed just to give
your computers time to shut down in an orderly
fashion, so perhaps all of this is beside the point,
and the reason no one offers a UPS with more
endurance.

   -- Bob




On Tue, Apr 30, 2013 at 9:38 AM, John Wesorick <john at wesorick.com> wrote:

> Bob, there are a lot of UPSs that you can add external batteries to.
> Usually they are more expensive models though. You generally have to buy
> their model/brand of battery though. There are also a lot of UPSs that
> allow you to switch from mains to battery without loss of power. A Liebert
> I had actually had the power input/output as a module, so you can take the
> whole UPS out (leaving just the module and running off mains) without
> disrupting power, assuming nothing happens to your mains. If you mean one
> that you can also attach a car battery, phone battery, or some rechargeable
> AA's you have laying around, etc. then I have never heard of that.
>
>
> On Tue, Apr 30, 2013 at 9:26 AM, Bob Kline <bob.kline at gmail.com> wrote:
>
>> To the point, has anyone seen a UPS
>> unit with a set of external terminals that
>> one can use to attach their own batteries?
>>
>> Say an inverter with the ability to switch
>> between mains electricity and the battery?
>>
>>    -- Bob
>>
>>
>>
>>
>> On Tue, Apr 30, 2013 at 5:20 AM, Ron Lauzon <rlauzon at gmail.com> wrote:
>>
>>> The last time I had a UPS blow, I found that, for the consumer-grade
>>> UPSs, 99% of the cost of the UPS was the battery.  So it was simply cheaper
>>> to get a new UPS.
>>> Repairing the old UPS was actually more expensive.
>>>
>>>
>>>
>>> On Mon, Apr 29, 2013 at 11:42 PM, <scott.tanner at comcast.net> wrote:
>>>
>>>> Can anyone recommend a local company to repair a failed APC UPS?   I
>>>> had one die last weekend and its currently only used in my personal test
>>>> network at work, so its not likely to get replaced.   The batteries are
>>>> fine, so its probably a more serious issue.
>>>>
>>>>
>>>>
>>>> Thanks,
>>>> Scott
>>>>
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>>>
>>>
>>>
>>> --
>>> Ron Lauzon - rlauzon at acm dot org
>>>    Homepage: http://webpages.charter.net/rlauzon/
>>>    Weblog: http://ronsapartment.blogspot.com/
>>>
>>>    DNRC: Lord of All Things That Are Fattening
>>>
>>>    "To be sure, conservative radio talk show hosts have a built-in
>>>    audience unavailable to liberals: People driving cars to some
>>>    sort of job." - Ann Coulter
>>>
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>>> Running Ubuntu 10.04 x86_64
>>>
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