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Paralleling Solar Panels - Can you do this? - Page 4

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Posted by vaughn on June 12, 2010, 11:25 pm
 



"

You can THINK of them as current sources if you wish, but that in no way makes
them current sources.  Actually, they produce voltage as well as current, (so
therefore, power) and they exhibit a significant source impedance.  As such,
they not only obey Ohm's law, they exhibit maximum power output when their load
impedance equals their source impedance.

Vaughn





Posted by m II on June 13, 2010, 6:56 am
 


vaughn wrote:


load

Funny thing..just like generators.



mike

Posted by Josepi on June 15, 2010, 12:02 am
 

PV panels act constant current sources and dependant on the solar radiation
hitting them.

This characteristic makes them parallelable (word?) unlike voltage sources
which would cause a short circuit. Short circuiting a current source is fine
but not a voltage source.

Being a current source does **not** mean there is no voltage. That would be
impossible in any electrical equation or circuit.



"

You can THINK of them as current sources if you wish, but that in no way
makes
them current sources.  Actually, they produce voltage as well as current,
(so
therefore, power) and they exhibit a significant source impedance.  As such,
they not only obey Ohm's law, they exhibit maximum power output when their
load
impedance equals their source impedance.

Vaughn






Posted by vaughn on June 15, 2010, 12:32 am
 



Like I said, you may THINK of them as constant current sources if you wish, you
may even QUOTE some other site that claims that they are, but that don't make it
true.

Vaughn



Posted by Josepi on June 15, 2010, 1:17 am
 

The high impedance statement you posted defines them as current sources for
the purpose electrical theorum.

PV panels function mainly as current sources. That makes it true for
engineering design purposes. The rest is semantics.

http://en.wikipedia.org/wiki/Current_source




Like I said, you may THINK of them as constant current sources if you wish,
you
may even QUOTE some other site that claims that they are, but that don't
make it
true.

Vaughn





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