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"Voltage drop across series diode". What does it stand for?
https://forum.pvsyst.com/viewtopic.php?f=25&t=3464
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Author:  tecnun [ Thu May 03, 2018 6:27 pm ]
Post subject:  "Voltage drop across series diode". What does it stand for?

Hello Team,

I have a technical question about the new wiring tool. In DC there exist a parameter called "Voltage drop across series diode" which in default represents 0,7 V...what is it for? I ve never calculated it (i think) or taken it into consideration (!!).
Thanks in advance best regards
Tecnun (Jose)

Author:  mhamon [ Mon Oct 29, 2018 11:55 pm ]
Post subject:  Re: "Voltage drop across series diode". What does it stand for?

There was a time when PV systems would use diodes in the string wiring to prevent the reverse flow of current into a faulted module from parallel strings. This is not used in the USA anymore and I'm not sure if it is used anywhere else. But if you have diodes in your DC wiring this will allow you to include the voltage drop across a forward biased diode, which is about 0.7V depending on the type of diode.

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