This is an old video but I have just recently been taught how to use the IV curve tester at work and was seeking more information on what the graphs that the machine spit out are actually telling me. Great information thank you. P.S. You can leave the cap OFF the marker mate you dont have to keep putting it on and off I found that quite hilarious.
Great. Thanks. Assuming the sun angle is a vector at some angle other than what the panels are mounted you can calculate using simple trig how much the angle affects the current value.
Dear ReneSola Global, Thanks for your great video. And I have 1 question about temperature coefficient which is that "What happens when temperature goes to (-40) or (-45) degree something?" As my understanding, when temperature goes down to minus (-) Solar PV module produce more energy than a usual. Is it right to calculate it, this way: normal temperature: 25degree In winter Mongolia reach -45degree This case result will be 70degree. So it can be 70degree * 0.40% = 28% It means when temperature reach -45 degree in Mongolia, Voltage will increase by 28%?. (Will produce more energy right?) Waiting for your kind reply BR Oyun-Erdene
Hi +Oyun-Erdene Altan-Ochir That is a very good question, and thank you for posting it. As pioneers within the renewable industry, we encourage the public to ask the right questions about photovoltaics. As they can help educate & share ideas with other like-minded people across the globe . As to your question about the Virtus II solar panel becoming more efficient as the temperature goes does below 0°C. And the secondary part, which relates to specifically Mongolia. 1. When temperature goes down, the power out and voltage will go up, it is true. a. However the temperature within the solar cell is normally higher, than the external air temperature. b. Normally the cell temperature is higher by 20˚C. 2. Apart from the air temperature, one also has to take into account is the irradiance from the sun, wind factors, humidity, etc a. There are many external factors that contribute towards the efficiency of the panel. 3. The lowest temperature usually happens in very low irradiation, such as at night. a. Temperatures like -45˚C in Mongolia happen in winter and at night, yes? i. With solar panels electric power generation originates from the sun irradiation during the day, and there is no power generation at night. ii. Hence let’s say hypothetically it is a cold day at about 12pm, approx -25˚C, that would mean that the cell temperature is about -5˚C. iii. There will be an increase in voltage, and theoretically it will be hard to give you an exact number of its efficiency rating because of the external factors. 4. The main aspect is that your panel will not be losing an efficiency on extremely cold day. Providing that its clear skies, and no snow cover over the panels. 5. When selecting your preferred solar panel, always look for one that has “potential induced degradation free” panels or “PID-Free” panels. a. This certification confirms that your panel has premium solar cells, EVA backing sheets and tempered glass, giving you a more robust PV system. b. And adding in as well, extremely low temperature co-efficient, which will give you a longer lasting & highly durable panel.
+ReneSola Global 3.iii, So if there is an increase in voltage how is there not a drop in Pmax then? Or is it just very negligible? What about solar panels on satellites, I would have thought cold temps would not be a factor.
@ Oyun Erdene: What a fantastic video and a great question and equally a great reply ! I a beginner entering the solar pv world. Love , respect and regards from India!!
@@Renesola What a fantastic video and a great question and equally a great reply ! I am a beginner entering the solar pv world. Love , respect and regards from India!!
Good video. I would like to know the importance of Open Circuit Voltage and Short circuit current. Does it gives any other idea other than those are the possible maximum of the current and voltage?
-0.40%/C is a very inefficient panel. I hope they've gotten better in the last 6 years. REC Alpha Black and many others have a -0.26%/C. That's important in my area where a panel can run over 68C (assuming the same +20 above ambient).
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I now understand so much more about the IV curve of solar cells. thank you so much
It's les than 10 minutes, and the knowledge input is so huge. Many thanks.
That was excellent. This gave me a very good overview and explaination on how to read a spec sheet of a solar module. Thank you so much
This is an old video but I have just recently been taught how to use the IV curve tester at work and was seeking more information on what the graphs that the machine spit out are actually telling me. Great information thank you. P.S. You can leave the cap OFF the marker mate you dont have to keep putting it on and off I found that quite hilarious.
Wonderfully explained. Thank you for recording and sharing.
Great. Thanks. Assuming the sun angle is a vector at some angle other than what the panels are mounted you can calculate using simple trig how much the angle affects the current value.
Thanks , exactly what I was looking for .
Winks
Lisa
Great explanation. Thank you
Really nice explanation. I have one question. How we can calculate error in the filling factor?
Perfectly explained.
Very interesting video
Very useful info, thanks for sharing.
Thanks a lot it's very helpful.
Very informative.One question why voltage is relatively constant but current changes almost linearly with change is solar radiation?Thank you
Flow of electrons from valance band to conduction band depends on solar radiation
Dear ReneSola Global,
Thanks for your great video.
And I have 1 question about temperature coefficient which is that "What happens when temperature goes to (-40) or (-45) degree something?"
As my understanding, when temperature goes down to minus (-) Solar PV module produce more energy than a usual.
Is it right to calculate it, this way:
normal temperature: 25degree
In winter Mongolia reach -45degree
This case result will be 70degree.
So it can be 70degree * 0.40% = 28%
It means when temperature reach -45 degree in Mongolia, Voltage will increase by 28%?. (Will produce more energy right?)
Waiting for your kind reply
BR
Oyun-Erdene
Hi +Oyun-Erdene Altan-Ochir
That is a very good question, and thank you for posting it.
As pioneers within the renewable industry, we encourage the public to ask the right questions about photovoltaics.
As they can help educate & share ideas with other like-minded people across the globe .
As to your question about the Virtus II solar panel becoming more efficient as the temperature goes does below 0°C.
And the secondary part, which relates to specifically Mongolia.
1. When temperature goes down, the power out and voltage will go up, it is true.
a. However the temperature within the solar cell is normally higher, than the external air temperature.
b. Normally the cell temperature is higher by 20˚C.
2. Apart from the air temperature, one also has to take into account is the irradiance from the sun, wind factors, humidity, etc
a. There are many external factors that contribute towards the efficiency of the panel.
3. The lowest temperature usually happens in very low irradiation, such as at night.
a. Temperatures like -45˚C in Mongolia happen in winter and at night, yes?
i. With solar panels electric power generation originates from the sun irradiation during the day, and there is no power generation at night.
ii. Hence let’s say hypothetically it is a cold day at about 12pm, approx -25˚C, that would mean that the cell temperature is about -5˚C.
iii. There will be an increase in voltage, and theoretically it will be hard to give you an exact number of its efficiency rating because of the external factors.
4. The main aspect is that your panel will not be losing an efficiency on extremely cold day. Providing that its clear skies, and no snow cover over the panels.
5. When selecting your preferred solar panel, always look for one that has “potential induced degradation free” panels or “PID-Free” panels.
a. This certification confirms that your panel has premium solar cells, EVA backing sheets and tempered glass, giving you a more robust PV system.
b. And adding in as well, extremely low temperature co-efficient, which will give you a longer lasting & highly durable panel.
Dear +ReneSola Global
Thank you so much for your reply.
It was so useful.
BR
Oyun-Erdene
+ReneSola Global 3.iii, So if there is an increase in voltage how is there not a drop in Pmax then? Or is it just very negligible? What about solar panels on satellites, I would have thought cold temps would not be a factor.
@ Oyun Erdene: What a fantastic video and a great question and equally a great reply !
I a beginner entering the solar pv world. Love , respect and regards from India!!
@@Renesola What a fantastic video and a great question and equally a great reply !
I am a beginner entering the solar pv world. Love , respect and regards from India!!
sir my solar panel measuring low Isc but curve show greater than Imp
Good video. I would like to know the importance of Open Circuit Voltage and Short circuit current. Does it gives any other idea other than those are the possible maximum of the current and voltage?
I HAVE A SOLAR PANEL OPEN CIRCIT 22.5V MAXMUM POWER TOL 3% MAX POWER 18V HOW MENNY WATTES IS THAT
-0.40%/C is a very inefficient panel. I hope they've gotten better in the last 6 years. REC Alpha Black and many others have a -0.26%/C. That's important in my area where a panel can run over 68C (assuming the same +20 above ambient).
How to find out the value of Rs and Rp for any solar Panel.
At 4:26. How to read current vs voltage at 500w/m2m
Dear sir, i think this is -0.4%/ degree C which means -0.004 / deg C..
then 30 X 0.004 = -0.12, not 12
-.12 = -12%
I thought the same
God help her
nice information, but the presentation is not good.
If you don't know how to make it by yourself , just go to inplix website.