Posted by Robert Morein on July 9, 2004, 7:48 pm
I'm going to have four panels on the ground, in series.
If any panel is disconnected, the voltage will drop to zero.
This would make it seem easy to provide a disconnect alarm.
However, I don't know how charge controllers and panels interact when a
panel(s) is shaded.
If the voltage drops to zero as a result of charge controller draw and
shading, a false alarm would occur.
Comments?
Posted by no useful info on July 9, 2004, 11:12 pm
> I'm going to have four panels on the ground, in series.
> If any panel is disconnected, the voltage will drop to zero.
>
> This would make it seem easy to provide a disconnect alarm.
>
> However, I don't know how charge controllers and panels interact when a
> panel(s) is shaded.
> If the voltage drops to zero as a result of charge controller draw and
> shading, a false alarm would occur.
>
> Comments?
>
>
is that a question or a comment of fact?
Posted by no useful info on July 9, 2004, 11:31 pm
> > I'm going to have four panels on the ground, in series.
> > If any panel is disconnected, the voltage will drop to zero.
> >
> > This would make it seem easy to provide a disconnect alarm.
> >
> > However, I don't know how charge controllers and panels interact when a
> > panel(s) is shaded.
> > If the voltage drops to zero as a result of charge controller draw and
> > shading, a false alarm would occur.
> >
> > Comments?
> >
> >
> is that a question or a comment of fact?
It's self explantory.
Posted by Anthony Matonak on July 10, 2004, 1:26 am
Robert Morein wrote:
> I'm going to have four panels on the ground, in series.
> If any panel is disconnected, the voltage will drop to zero.
>
> This would make it seem easy to provide a disconnect alarm.
You would likely do better using a more traditional alarm system.
At night PV panels don't usually produce any voltage at all.
Anthony
Posted by Robert Morein on July 10, 2004, 1:40 am
> Robert Morein wrote:
> > I'm going to have four panels on the ground, in series.
> > If any panel is disconnected, the voltage will drop to zero.
> >
> > This would make it seem easy to provide a disconnect alarm.
> You would likely do better using a more traditional alarm system.
> At night PV panels don't usually produce any voltage at all.
> Anthony
I understand.
The panels will be taken indoors at night.
> If any panel is disconnected, the voltage will drop to zero.
>
> This would make it seem easy to provide a disconnect alarm.
>
> However, I don't know how charge controllers and panels interact when a
> panel(s) is shaded.
> If the voltage drops to zero as a result of charge controller draw and
> shading, a false alarm would occur.
>
> Comments?
>
>