short lived UPS system [RE-wrenches]

[Clive Wilkins, PowerSense]

Darryl, I use a auto- watering system at unattended sites go to
www.fillwatch.de

Cheers
Clive
----- Original Message -----
From: "Darryl Thayer" <daryl_solar at yahoo.com>
To: <RE-wrenches at topica.com>
Sent: Saturday, September 13, 2003 4:03 PM
Subject: RE: short lived UPS system [RE-wrenches]


> Thanks for the help on other topics
> I have another question.  I just got a new customer
> who has a UPS system consisting of two sw5548
> inverters, and 800 AH of batteries.  He has only had a
> few outages but he has ruined his second set of
> batteries in less than three years.  The odor from the
> hot dry batteries set off his smoke alarm.  In less
> than two years should lead antimony batteries go dry?
>
>
> I think there are two problems, the SW5548 have
> overcharged and once the batteries had a problem in
> one cell the others ( four parallel strings, 200 ah
> per string, 48 volt) dumped there power into the bad
> cell and the overcharge was rampant.  They had
> Hydrocaps which also were two years old, and either
> could not keep up or just wore out.
>
> How should I solve this to make this system last
> longer?
>
>
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