I have no opinion on computing the charge from the voltage; it does not actually matter, the only charge nut really cares about is "too low".
However, seeing a maximum voltage of 3V on a unit that is nominally 96V seems wrong, even if that is 8 batteries of 12V each. Could there be a conversion error? Perhaps 2.3V should be 23V? -- Peter Carlos Rodrigues wrote: > > Right now megatec just calculates a linear approximation. It doesn't > give accurate values, but it is enough to have a fuzzy idea of the > charge left (like saying "it's almost noon" instead of "it's 12:45"), > and I'm not seeing how to plot a more accurate charge that fits all > the models that megatec is supposed to support (especially given I'm > no electrical engineer). > > Now, I've introduced these values to megatec, and I've commited it to > SVN. Can you (not Charles) check if they are acceptable now? > > On 4/22/06, Charles Lepple <[EMAIL PROTECTED]> wrote: > > On 4/22/06, lonely wolf <[EMAIL PROTECTED]> wrote: > > > The voltage doesn't look to have a linear dependency with the charge ..= > . > > > > Here's the charge curve used by the Tripp-Lite driver: > > > > http://boxster.ghz.cc/projects/nut/browser/trunk/drivers/tripplite.c#L= > 456 > > > > Generally speaking, measuring the voltage to find charge is a bit > > problematic unless you take into account the amount of current flowing > > in or out of the battery as well (a real-world battery has non-zero > > Thevenin resistance, so it is not a pure voltage source). The best you > > can do is plot voltages over time (as reported by the UPS), and try to > > fit the curve. > > > > -- > > - Charles Lepple > > > > _______________________________________________ > > Nut-upsuser mailing list > > [email protected] > > http://lists.alioth.debian.org/mailman/listinfo/nut-upsuser > > > > > -- > Carlos Rodrigues > > _______________________________________________ > Nut-upsuser mailing list > [email protected] > http://lists.alioth.debian.org/mailman/listinfo/nut-upsuser > _______________________________________________ Nut-upsuser mailing list [email protected] http://lists.alioth.debian.org/mailman/listinfo/nut-upsuser
