Re: Diode in solar system..
-> This is a tricky one, a guy called Kirchoff would explain it better t
-> [Kirchoff's Laws]. The 0.7 volts is an emf [electromotive force] not
-> resistive drop. The diode behaves *like* a wee battery and series
-> switch, connected in series opposing the battery voltage. So what is
-> "lost" is 0.7 of the 30 volts available on open cct. .7 div by 30 =
->  2.33%. Less than a wee cloud passing by.
->
-> If you find the concept of 0.7 being an emf unconvincing, then put a
-> voltmeter across the diode while increasing/ decreasing the panel
-> output eg by shading it. You will see that the 0.7v does not change.
Yep!  Not disagreeing with that at all.  I have used series-connected
diodes in a number of applications to get a fairly stable fixed
voltage drop.  Works well.
I think what we have is a terminology difference, not an "electrical"
one.  To you, the drop across the diode is fine.  To me, it's
something I'd like to find a better way to do.  Nothing mutually
exclusive there!
-c-
--- ViaMAIL!/WC4 v1.30 
---------------