1000w solar panel? Is it even true

Cosmik Debris said:
Exactly. So the system can have a max voltage of 1000V. Which application would that be for? Plus the consensus is that th OP is false on page one. Start reading.
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How I understand it, what they are implying is the max string voltage when connecting multiple panels in series. For example, hypothetically, if one panel is 100V, then you can't have a string of 11. I take it you don't have a solar setup at home?
 
Cosmik Debris said:
Right. So 1000 Volts and 6000 Amps on a solar system is credible to you? OK then.
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You have still failed to appreciate and comment on what the CB specs mean and what that "x kA" rating is all about!
Once again, a major but for you a normal fail, to READ AND COMPREHEND what others' post.

And the current would NOT be 6 000 Amps operating.

a 1kW system running at 1 000 V implies an operating current of 1Amp!

PS, did you even bother to go and look at your own DB? what did you see there?
 
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wingnut771 said:
How I understand it, what they are implying is the max string voltage when connecting multiple panels in series. For example, hypothetically, if one panel is 100V, then you can't have a string of 11. I take it you don't have a solar setup at home?
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It has been explained to him a thousand times already. Here's my favorite post, after Ron Swanson made a very decent effort of trying to break it down to him in plain language, I have to say there is some hint of an eg2505 in Cosmik Debris, there is a point when he just flatly refuse to see reason no matter what.

Cosmik Debris said:
Ron, this is for long distance AC transmission. Long distance DC transmission requires thick cables, the reason long distance transmission is via AC, thinner cables and high voltage.

No local authority is going to allow 1000V system distribution in a house. Houses are 220V, Factories 380V and maritime voltages 440V. The Eskom breaker for most houses is 80 Amps but according to some here, their systems are capable of 6000 Amps. Those are industrial power requirements and specialised personnel are required to work with and switch them.
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www.electricalclassroom.com

What is kA rating (breaking capacity) of MCB and MCCB?

What is kA rating, the significance of kA rating, MCCB and MCB, Definition of Ultimate breaking capacity - Icu, Definition of Service breaking capacity - Ics
www.electricalclassroom.com www.electricalclassroom.com

Under short-circuited conditions, the current flow increases exponentially. That means during short circuits a circuit designed for 10A can cause a current flow of over thousands of amperes. If the circuit breaker used has a very low rating or the ultimate short circuit withstand current rating, the circuit breaker, as well as the circuit, will be damaged. Therefore, the kA rating of a circuit breaker is significant.
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1000 W/m2? Looks a bit suspect, but I'm no expert on panels or electronics.

I do know that's more than the average solar radiation energy per m2 from the sun at maximum, most places, though.
Tell them they can win a Nobel prize if I'm reading that spec right. Or is the test conditions in the lab?
 
TheChamp said:
It has been explained to him a thousand times already. Here's my favorite post, after Ron Swanson made a very decent effort of trying to break it down to him in plain language, I have to say there is some hint of an eg2505 in Cosmik Debris, there is a point when he just flatly refuse to see reason no matter what.
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The thing is that he weaves very thin threads of truth or "facts" into his arguments. These facts, when viewed in isolation, are true, but have no bearing on the actual argument at hand, and are surprisingly effective at creating confusion. I have a reasonable suspicion that he served in the SADF's counter-intelligence movement :laugh:.

As for the OP @Neerkuma is an absolute troll, didn't even bother responding. I am sure that he has observed all the theatrics, rubbing his hands and giggling uncontrollably.
 
Yeah, that is bad form, or he was testing his design to get inputs from us, now he is going to tweak it accordingly.
 
TheChamp said:
Yeah, that is bad form, or he was testing his design to get inputs from us, now he is going to tweak it accordingly.
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I have just asked the guy selling the panels not to come through.
It's not confirmed. I have asked my contacts in Telkom to find out more info on the panels.

Btw here is the link if you want to check. I would rather go with a reputed solar manufacturer.

Facebook

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Neerkuma said:
I have just asked the guy selling the panels not to come through.
It's not confirmed. I have asked my contacts in Telkom to find out more info on the panels.

Btw here is the link if you want to check. I would rather go with a reputed solar manufacturer.

Facebook

www.facebook.com www.facebook.com
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Yeah, good for you, I have no idea what is happening here but it's not good, firstly the specs don't check out, then the Telkom/Openserve thing, the sizes are also seemingly not consistent with the panel wattage.

Lastly if someone has R2500 why not just go to the shop and buy the real deal, not like this is a bargain.
 
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Cosmik Debris said:
Right. So 1000 Volts and 6000 Amps on a solar system is credible to you? OK then.
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The way most solar mppt controllers work is converting
high voltage low current dc to
low voltage high curent dc to charge batteries

Solar panels have a maximum short circuit current most of them between 8 and 10 amps , so even if you have 20 x 50v pannels in series, short current can't exeed 8 or 10 amps , and system voltage will he pulled down to near 0v

Hope this makes sense.
 
thehuman said:
The way most solar mppt controllers work is converting
high voltage low current dc to
low voltage high curent dc to charge batteries

Solar panels have a maximum short circuit current most of them between 8 and 10 amps , so even if you have 20 x 50v pannels in series, short current can't exeed 8 or 10 amps , and system voltage will he pulled down to near 0v

Hope this makes sense.
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No it does not make sense
 
The kA rating on circuit breakers are more applicable to inductive loads.
But it has been stated here, it is the rated maximum short circuit current the circuit breaker can safely break without exploding.

The actual short circuit current of the circuit will depend on wire size and length

A circuit breaker has 2 principle safety ratings, maximum voltage and breaking capacity in kilo amps at a given voltage.
It should also be noted that many circuit breakers don't give the kA rating at maximum voltage.

1000v @ 6kA for such a tiny breaker is quite unlikely, it is all about energy, so a 1000V @ 6000 amps for even a really short duration is a lot of energy for such a small device to absorb and not explode.
Keeping in mind that 1 joule = 1 ampere * 1 volt * 1 second.
The only way realistically to achieve 6kA @ 1000v is being able to disconnect incredible quickly.
So working back from a realistic amount of energy to dissipate you can figure out how quickly the breaker would need to disconnect to not blow apart given the energy.

I'm not really inclined to spend the next hour doing the calculations and pouring over the spec sheets, but I would be very careful just quoting numbers randomly from a circuit breaker.
Physics doesn't care about your circuit breaker specs, there is a certain amount of joules and it needs to go somewhere.
Given the size of the breaker there is a hard limit to how much of that energy it can dissipate, so it all comes down to how quickly it can disconnect the load.
 
Gnome said:
The kA rating on circuit breakers are more applicable to inductive loads.
But it has been stated here, it is the rated maximum short circuit current the circuit breaker can safely break without exploding.

The actual short circuit current of the circuit will depend on wire size and length

A circuit breaker has 2 principle safety ratings, maximum voltage and breaking capacity in kilo amps at a given voltage.
It should also be noted that many circuit breakers don't give the kA rating at maximum voltage.

1000v @ 6kA for such a tiny breaker is quite unlikely, it is all about energy, so a 1000V @ 6000 amps for even a really short duration is a lot of energy for such a small device to absorb and not explode.
Keeping in mind that 1 joule = 1 ampere * 1 volt * 1 second.
The only way realistically to achieve 6kA @ 1000v is being able to disconnect incredible quickly.
So working back from a realistic amount of energy to dissipate you can figure out how quickly the breaker would need to disconnect to not blow apart given the energy.

I'm not really inclined to spend the next hour doing the calculations and pouring over the spec sheets, but I would be very careful just quoting numbers randomly from a circuit breaker.
Physics doesn't care about your circuit breaker specs, there is a certain amount of joules and it needs to go somewhere.
Given the size of the breaker there is a hard limit to how much of that energy it can dissipate, so it all comes down to how quickly it can disconnect the load.
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I actually don't think anyone said anything about a 1000V 6kA breaker, it was two separate things that Cosmik Debris couldn't wrap his highly qualified brain around, the 1000Vdc system voltage of the solar panel and the kA rating on circuit breakers.
 
Neerkuma said:
I have just asked the guy selling the panels not to come through.
It's not confirmed. I have asked my contacts in Telkom to find out more info on the panels.

Btw here is the link if you want to check. I would rather go with a reputed solar manufacturer.

Facebook

www.facebook.com www.facebook.com
Click to expand...
Looking at those photos they are physically too small
Looks like 100 Watt sized panels, maybe 150 Watts at a push
Busllshit that it is 400 Watts, that size panel will be massive, around 1m wide and around 2m long

I wont even comment how big a 1000w panel would be if it did exist but I recon somewhere the size of a VW Kombi roof
 
Gnome said:
The kA rating on circuit breakers are more applicable to inductive loads.
But it has been stated here, it is the rated maximum short circuit current the circuit breaker can safely break without exploding.

The actual short circuit current of the circuit will depend on wire size and length

A circuit breaker has 2 principle safety ratings, maximum voltage and breaking capacity in kilo amps at a given voltage.
It should also be noted that many circuit breakers don't give the kA rating at maximum voltage.

1000v @ 6kA for such a tiny breaker is quite unlikely, it is all about energy, so a 1000V @ 6000 amps for even a really short duration is a lot of energy for such a small device to absorb and not explode.
Keeping in mind that 1 joule = 1 ampere * 1 volt * 1 second.
The only way realistically to achieve 6kA @ 1000v is being able to disconnect incredible quickly.
So working back from a realistic amount of energy to dissipate you can figure out how quickly the breaker would need to disconnect to not blow apart given the energy.

I'm not really inclined to spend the next hour doing the calculations and pouring over the spec sheets, but I would be very careful just quoting numbers randomly from a circuit breaker.
Physics doesn't care about your circuit breaker specs, there is a certain amount of joules and it needs to go somewhere.
Given the size of the breaker there is a hard limit to how much of that energy it can dissipate, so it all comes down to how quickly it can disconnect the load.
Click to expand...
This entire debate was pointless and completely unrelated to the pretty ropey pic posted from the outset. And caused entirely by CD and his crazy comments. You went much further than any of us was prepared to go.
 
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