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Hi guys.
Just a Q re: what diection and angle for panel at 3
degree south of the equater in Africa? Would you face some Nor-Eastly and some
Nor-Westerly? This is a Q that has been hrown around since I installed and
commisioned a 100km 4 x E1 link in Tanzania earlier this year. The gear was DMC
Stratex DXR-100 24v 1.5 amp 400mhz. The longest path is 67km. Some advice
would be cool.
Cheers from Down Under.
Banjupb
----- Original Message -----
Sent: Sunday, November 13, 2005 6:40
AM
Subject: Re: [Repeater-Builder] Solar
Panel Question
I'm not trying to start a fight, Eric, just answer a few
questions.
Unless you are pointing the dissimilar panels in different
directions....
[Unless we have two or more suns, the panels should be in the same
plane, pointing in the same direction. Since the angle for optimum
operation in the winter is steeper than in summer, it is generally a
good idea to use the winter angle year around. In summer, there is
usually an excess of solar energy, so the winter angle is more than
adequate.]
Around here, some folks are experimenting with the
east to west alignment of several panels. Most of us are not fortunate
enough to have a sun tracker mount, and just as it's important for
summer/winter declination, folks are seeing that there are instances where
several smaller panels in a east to west alignment will have advantage over
one large stationary panel.
[I have bought panels from Siemens, Solarex, Shell, and Phillips, and
*none* of them included a diode on the output. An output diode is *not*
the same thing as a diode embedded within the panel itself.
Okay, so what is the embedded one for?
Remember that one of the tasks performed by a good solar controller
is to shunt all of the excess power produced by the panels, once the
batteries are fully charged.
Can you elaborate on this, Eric?
[Most of the better solar charge controllers have three basic
functions: 1. To regulate the current going to the battery so that it
is not overcharged; 2. To disconnect the load when the battery voltage
falls to a level where either the battery or the load can be damaged ;
3. To shunt excess energy from the solar panels, so that high voltages
cannot damage the load equipment. It's important to note that the solar
panels, the battery, and the load are independently connected to the
controller so that it has complete control over the power distribution.
One
instance I see where the shunt function is very valuable is, *if* a large
battery bank is not used (or none at all) excess energy could over voltage the
load.
I'm I on the right track?
Kevin
YAHOO! GROUPS LINKS
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