A bypass diode also protects a panel from being destroyed by reverse polarization if it gets shaded while the others are still in full sun.
Your 'higher impedance' in terms of the I-V characteristic means that the minus pole of the PV panel will get positive with respect to the plus pole, or in other words that the diodes are in blocking mode. They can not stand a high reverse blocking voltage, so an anti-parallel diode can save them from getting destroyed.
When the panels deliver power, that anti-parallel diode is in blocking mode, so the system barely 'sees' them.
Applying 'power optimizers' (DC-DC converters with MPPT) as you call them could be a viable compromise between one large DC-AC inverter and individual 'micro'-inverters. However, I don't know whether that would also apply to the price of the system.
Would you still be of that opinion if the price of one (not so) micro-inverter would approach the price of the solar panel it serves?
Panels are nowadays available with a power output of around 250 W.
I wouldn't call any inverter for such a panel 'micro'.
I think you're partially right. The individual panels may have a diode anti-parallel to their (sub-)string(s) of cells, effectively switching off the whole bunch of cells in that sub-string if one of the cells becomes shaded. This not only prevents the whole array to become in-productive but also influences the shape of the MPP (Maximum Power Point) curve, for which the MPPT (Maximum Power Point Tracker) that you are aiming at then merely tries to find a new (global) optimum.
My guess is that the extra cost for all those (micro) inverters will not likely be compensated by the extra yield if one panel is shaded or more dirty than the others.
I can go a long way with you with respect to micro-inverters, but what they do well is adapt to the individual panels that they serve. If one panel is shaded, or only dirty, and the whole string of PV panels is served by one power inverter, the total output can go down considerably and stay low until you clean that one panel.
With micro-inverters however only the output of that one panel (or few panels) served by the micro-inverter will be reduced.
First let me compliment you with your excellent reply! The effort you put in it is the biggest compliment you can give me (if it wasn't a copy/paste:).
However, I only partly agree with your comment regarding the mass media.
It is true that mass media is setting us up against ourselves, but also that they make us agree with the warmongering puppets that seem to run our governments.
Further, your point 1) isn't valid, your point 2) is clear nonsense, point 3) is totally off-topic, and point 4) to 6) also make no sense at all.
So, except from the first two lines and the last, your post is obviously copy/pasted noise (expect a copyright notice in your mailbox).
Democracy and freedom are combative. If people aren't combative about these values, the political system will degenerate into what it has become now.
However, as the elitist pressure on the masses will increase, so will combativeness, and the cycle will start all over again, only with different puppets and -isms.
Most people live, and the biggest markets are, outside the US or Canada.
Where I am I can (cheaply) buy tobacco leaves in the market and make my own cigarettes and cigars.
Remember the treaty of Versailles after WWI? Some general came out of the meeting and said:
"We have just started WWII."
It was all geopolitics by the English (WWI), later the Americans (WWII), to keep Germany and the rest of Western Europe from allying with Russia which would have formed the greates economic and military power in the world.
Currently it's the same geo-political objective that led the USA to foment a overthrow in Ukraine.
A barrier between Europe and Russia is and always was the objective.
Indeed I'm afraid you're living on the wrong planet.
Climate models can only be accurate for the period that they have been calibrated to give the most accurate results.
The more accurate the models seem to 'predict' the past, the more the tendency to be less accurate with respect to future results.
Just try it. Set up a polynomial model that fits some limited data series of some physical phenomenon that's not too deterministic or simple.
Start with order 1 and increase the order while fitting the parameters.
Look how it deviates from a future data sample of the same system as the order increases.
Results from the past are no accurate prediction of results in the future.
Assuming Juncker is a male it is 'unserer Fuehrer'. Oh, and also Schutzstaffeln.
Anyway, you seem to have failed to understand that WWI and WWII, you know, that one with that Fuehrer, was caused by the Anglo-Americans and their allies for geo-political reasons.
Just like nowadays with the Ukrainian 'question', America was and is hellbent on not to allow Russia and Europe form any economic alliance as that would rapidly evolve into a big economic--if not geo-political power--competitor causing the USA losing its hegemonic dominance in the world.
It doesn't matter as long as the people are interested. Any evil company can be brought to its knees by a worldwide consumer boycott.
If the people are not interested, then obviously it doesn't matter either.
If you weren't addressing me with such totally inappropriate and abusive language, I would have explained that it is possible to mod in a thread in which one has commented. Only all those comments will be deleted at the first mod in the thread.
I suggest you talk some more to yourself that way, because what you said seems to totally apply to yourself.
By the way, you are also blacklisted now due to inappropriate abusive language.
You can take your faeces somewhere else, thank you very much.
Slashdot Mirror
That's interesting, could you give me the brand name of (and if possible the link to) those inverters?
A bypass diode also protects a panel from being destroyed by reverse polarization if it gets shaded while the others are still in full sun.
Your 'higher impedance' in terms of the I-V characteristic means that the minus pole of the PV panel will get positive with respect to the plus pole, or in other words that the diodes are in blocking mode. They can not stand a high reverse blocking voltage, so an anti-parallel diode can save them from getting destroyed.
When the panels deliver power, that anti-parallel diode is in blocking mode, so the system barely 'sees' them.
Applying 'power optimizers' (DC-DC converters with MPPT) as you call them could be a viable compromise between one large DC-AC inverter and individual 'micro'-inverters. However, I don't know whether that would also apply to the price of the system.
Would you still be of that opinion if the price of one (not so) micro-inverter would approach the price of the solar panel it serves?
Panels are nowadays available with a power output of around 250 W.
I wouldn't call any inverter for such a panel 'micro'.
I doubt the increase in yield will compensate the additional expenses for all those inverters.
I think you're partially right. The individual panels may have a diode anti-parallel to their (sub-)string(s) of cells, effectively switching off the whole bunch of cells in that sub-string if one of the cells becomes shaded. This not only prevents the whole array to become in-productive but also influences the shape of the MPP (Maximum Power Point) curve, for which the MPPT (Maximum Power Point Tracker) that you are aiming at then merely tries to find a new (global) optimum.
My guess is that the extra cost for all those (micro) inverters will not likely be compensated by the extra yield if one panel is shaded or more dirty than the others.
I can go a long way with you with respect to micro-inverters, but what they do well is adapt to the individual panels that they serve. If one panel is shaded, or only dirty, and the whole string of PV panels is served by one power inverter, the total output can go down considerably and stay low until you clean that one panel.
With micro-inverters however only the output of that one panel (or few panels) served by the micro-inverter will be reduced.
No & no. :)
First let me compliment you with your excellent reply! The effort you put in it is the biggest compliment you can give me (if it wasn't a copy/paste :) .
However, I only partly agree with your comment regarding the mass media.
It is true that mass media is setting us up against ourselves, but also that they make us agree with the warmongering puppets that seem to run our governments.
Further, your point 1) isn't valid, your point 2) is clear nonsense, point 3) is totally off-topic, and point 4) to 6) also make no sense at all.
So, except from the first two lines and the last, your post is obviously copy/pasted noise (expect a copyright notice in your mailbox).
Democracy and freedom are combative. If people aren't combative about these values, the political system will degenerate into what it has become now.
However, as the elitist pressure on the masses will increase, so will combativeness, and the cycle will start all over again, only with different puppets and -isms.
Most people live, and the biggest markets are, outside the US or Canada.
Where I am I can (cheaply) buy tobacco leaves in the market and make my own cigarettes and cigars.
Germany isn't Nazi-Deutschland anymore :)
Remember the treaty of Versailles after WWI? Some general came out of the meeting and said:
"We have just started WWII."
It was all geopolitics by the English (WWI), later the Americans (WWII), to keep Germany and the rest of Western Europe from allying with Russia which would have formed the greates economic and military power in the world.
Currently it's the same geo-political objective that led the USA to foment a overthrow in Ukraine.
A barrier between Europe and Russia is and always was the objective.
Indeed I'm afraid you're living on the wrong planet.
Did you read about the geo-political motives?
have your currency debased
be thrown out of the international payment system
have your political career destroyed
have wars on your soil
color revolution
receive no more oil
nor gas
be assassinated?
Climate models can only be accurate for the period that they have been calibrated to give the most accurate results.
The more accurate the models seem to 'predict' the past, the more the tendency to be less accurate with respect to future results.
Just try it. Set up a polynomial model that fits some limited data series of some physical phenomenon that's not too deterministic or simple.
Start with order 1 and increase the order while fitting the parameters.
Look how it deviates from a future data sample of the same system as the order increases.
Results from the past are no accurate prediction of results in the future.
Assuming Juncker is a male it is 'unserer Fuehrer'. Oh, and also Schutzstaffeln.
Anyway, you seem to have failed to understand that WWI and WWII, you know, that one with that Fuehrer, was caused by the Anglo-Americans and their allies for geo-political reasons.
Just like nowadays with the Ukrainian 'question', America was and is hellbent on not to allow Russia and Europe form any economic alliance as that would rapidly evolve into a big economic--if not geo-political power--competitor causing the USA losing its hegemonic dominance in the world.
It doesn't matter as long as the people are interested. Any evil company can be brought to its knees by a worldwide consumer boycott.
If the people are not interested, then obviously it doesn't matter either.
I suggest you take your questions to wikipedia or so.
Discussions here on slashdot require at least some basic education, you know.
Due to repeated use of inappropriate and abusive language you are now on my blacklist, do not expect any response from me for a while. Thank you.
It doesn't matter whether you're a native English speaker or not. If you call people names you can expect a response.
Please don't do that again.
If you weren't addressing me with such totally inappropriate and abusive language, I would have explained that it is possible to mod in a thread in which one has commented. Only all those comments will be deleted at the first mod in the thread.
I suggest you talk some more to yourself that way, because what you said seems to totally apply to yourself.
By the way, you are also blacklisted now due to inappropriate abusive language.
You can take your faeces somewhere else, thank you very much.
Yes, you are right, I missed that part.
I doubt that any country has a proper constitution, maybe Iceland is an exception.
You're on my blacklist now due to totally inappropriate and abusive language, sorry and thank you very much.
It doesn't matter, you're on my blacklist due to totally inappropriate and abusive language, thank you.