On 11/27/05, Donald E Haselwood <dhaselwood@verizon.net> wrote:
> On Sunday 27 November 2005 20:33, jeff wrote:
> > On Sunday 27 November 2005 07:40 pm, steve szmidt wrote:
> > > One thing to be aware of is that the electronics is built to handle a
> > > certain load. Putting a much larger battery, and load, could result in
> > > overloading the circuitry. Also the charging circuit has to be able to
> > > charge your batteries of course.
> > >
> > > Granted, I've never done it with a much larger batteries, and I don't
> > > know what kind of margins these circuits are built with. But I would
> > > imagine that if you connected a car battery to one of these 500W, put
> > > over 500W load on it and then turned off the AC you could eastoast it.
> >
> > Adding a larger battery (or more batteries) doesn't pose a problem to the
> > UPS. It (the UPS) will still draw the same wattage at the same rate
> > regardless of the battery capacity. Recharging a larger capacity battery
> > will take longer, but unless the battery has an internal fault the UPS will
> > happily charge whatever size battery that you plug into it.
> >
> The potential problem with the larger battery is likely thermal. I have heard
> (not verified, however) that the UPS circuitry is designed to not overheat in
> time duration provided the designed battery. If overheating would be a
> problem it could easily be overcome with a better ventilation, a fan, etc.
Yes, the heating problem is associated with the sourcing of power during a
failure, and indeed a fan or a bigger fan in the case moving air around the
switching transistors will take care of that problem.
-- Chuck Hast To paraphrase my flight instructor; "the only dumb question is the one you DID NOT ask resulting in my going out and having to identify your bits and pieces in the midst of torn and twisted metal."----------------------------------------------------------------------- This list is provided as an unmoderated internet service by Networked Knowledge Systems (NKS). Views and opinions expressed in messages posted are those of the author and do not necessarily reflect the official policy or position of NKS or any of its employees.
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