Re: [IDEA] Poor man's UPS

[Matthias Schniedermeyer <ms@citd.de>]

Christian Trefzer wrote:
> On Mon, May 22, 2006 at 04:40:58PM +0100, Alan Cox wrote:
> 
>>Lead acid batteries should be kept well charged to avoid sulphation and
>>always full charged when recharging, preferably using a charger that
>>will do proper three step charging. "Cycling" a lead acid battery is a
>>great way to destroy it.
>>
> 
> 
> So it is better to use only one battery (or an array thereof) which is
> sort of charged and discharged at the same time, or is this idea just as
> screwed..? I don't have a degree in electronics, mind you : )
> 
> Might be easier to build something that keeps a battery well maintained
> and switches in case of power outage. With large enough condensors to
> bridge the gap, which would also iron out any peaks and stuff, this
> should work pretty well.

You just described the working-principle of a "line-interarctive" UPS.
AFAICT this is the most used UPS-type, at least for every "small" UPSes 
i've seen in the last few years.




Bis denn

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