HI, thanks for the video, I came here to refresh my memory. Your video is well executed; however, you have made quite a few blunders that will almost definitely confuse someone who uses this video as a primary source of understanding. 6:11 - Power required from Solar Panel ... take note of your formula... the result is in Watts. 7:17 - Power required from Solar Panel = 3240/(5.84*0.73) = 759.99 = 760 Watts - You can then round this off to 1000W for simplicity. 8:30 - the power required from solar panels should be in Watts (W) and not kilo Watt hours (kWh) Output power of solar panels are in Watts (W). For those who don't know where the 250 came from. May I suggest you add a note saying that you chose this particular size panel for this example :) Anyway, you get the point I hope. Great visual execution but pay a bit more attention to your final product. You obviously understand what you're doing but there were unnecessary mistakes.
Thanks for the post. How did you get value 833W as power required from solar panel resolving the formula (3240X5.84X0.73). It gives a value as 13812.768 not 833W per panel. Pl explain. Thanks
Based on the formula in (5.30 sec) Power Required from Solar panel (W )= (Total Energy (Wh) / Efective Sunschine hours x System Eficiency) We apply the formula in (5.30 sec) and we get not 833 W but we get 760W for "Power Required from Solar panel"
Helpful! Informative! But I think the right way of choosing charge controller is by identifying the configuration of the solar pv panels and calculating the total (Isc) short circuit current of the array. I also want to emphasize that on designing Solar-off-grid sytem, the autonomy days without sunlight will depend on the location of the installation. Just like in Philippines where sunlight is minimal during rain storms and other weather conditions that usually lasts for 6 days.
Please sir reply to this comment please i have one question to ask. Initially you wrote the formula for( power required from solar pv in watts)= total energy required from solar PV(wh)/effective sunshine hours x system efficiency But later in the video after calculating system efficiency you multiply all the terms instead of divide. You did----> power required from solar panel= total energy required x effective sunshine hours x system efficiency. Which one is right? = 3240 x 5.84 x 0.73 this gives 13812.768W IF I DO =3240/ 5.84X 0.73= 760Watts Which one is right? Please clear this doubt please
First of all, thank a lot for great explaination, Can this calculation consider for inverter (controller bulid in with inverter) Or need another way to calculate
Very informative! Helped me better assess my current small solar system. I am stilly fuzzy on the relevance of calculating the charge controller current. I understand the functions of the controller, but don’t see how knowing the 83 amps relates to the rest of the system. Still looking . Thx!
i have a 286,650kwh in my bill statement. Should i just divide by 30 to get the daily consumption and continue with your formula to get the sizing of the solar panel needed.
1) If the total daily power is 3240 wouldn't you need to DIVIDE by the hours of sunlight (5.84) to get the hourly rating of the solar panel needed? 2) Don't you also need to DIVIDE by the system efficiency? SO if the efficiency were very low (e.g. .50) you would need more power. And if it were high (close to 1) it would be near the output power? If 1 & 2 make sense that would give Power as 3240*(1/5.84)*(1/0.73) = ~760W
Max power 270, open circuit voltage 39, short circuit voltage 9.18, voltage at maximum power 30.9 current at max power 8.73,,, max system voltage 1000, series fuse rating 20A, ... I have 15 panel can give me calculations
This video is mostly animations and flawed information. The formulas are not presented correctly the hours of sunlight and efficiency should be divisors, as the first slide labeled "Step 2" showed. on the next slide they appear as multipliers - a wrong formula. The number 833W appears out of nowhere and is not equal to 3240 x 5.84 x .73, which is over 13,800W. What is the point of finding and multiplying so many coefficients of efficiency if in the end you're just going to round up 833W to 1000W arbitrarily? On calculating number of panels they divide by 250 as if all the panels in the world generate 250W. And also, they are using the wrong units in certain places, like in the solar panel calculations the output of a panel is measured in Watts, not Watt hours.
Can you please explain “Power Required from Solar Panel = 3240 x 5.84 x 0.73 & according to you it’s 833 Watts” then it’s rounded to 1000 Watts. I am not clear about the way you get 833 Watts. Please help me to understand this
Utter balony !! 3240Wh should be DIVIDED by 5.84 sunhours to give the Power (W) required to produce that much energy in a day and that result should be DIVIDED by 0.73 to overcome the inefficiency giving 760W not 833W (which appears to be a totally random figure). Also how did 1000W (power) suddenly become 1000Wh (Energy) and then get divided into 4 x250W (back to Power again) panels. 'Total Power required per day' is totally meaningless. That number (442W) is simply the power that could be required at any instant if everything (all listed loads) were switched on at the same time. The 5.84 sunhours is an anual average. To rate your system on 1 day of 'back-up' would mean that it would not work well, if at all in the winter when you are pretty much guaranteed to get fewer hours of useful sun. No mention of batteries in series to raise the voltage and lower DC the current making all the electronics and cabling a lot cheaper. Who really wants an 83A (100A) charge controller or that kind of expensive heavy cabling or those kind of heat losses?
On the average my electric bill states I use 800kw a year, except during the summer June, July and August being the highest of about 1,500kw, (Sept the watts start to go down to 800kw). Just knowing how many Kilo Watts I uses a year can I still use the same formula to determine my solar and wind power system for my home?
So, I should set the system to the higher value of 1,500kw since it is my max. And if I do plan on using solar and wind power, the total watts should be reached combined of solar and wind.
I just simplified the formula at 8:39 to 9:39 as Number of PV panel required=(Total energy required (Wh))/(effective sunshine hours×output of PV panel×system efficiency). Any comments? Good or bad?
But according to the formula wasn’t the total energy required for solar panel supposed to be divided by the Efficient Sunlight hours and System efficiency???
Agreed! Its oversize. Calculation should be base on the maximum short circuit current of the PV system multiply by number of PV string multiply by safety factor normally 1.25
3240wh consumption is only under 280ah Lifepo4 battery, my formula is 280ah x 12.8v = 3584wh or maybe a 300ah lifepo4 Battery system. 400ah is too much
He should have included depth of discharge in his calculations. This way, there's a difference in battery size when using flooded batteries, lithium or AGM. 400ah isn't much if it's lead acid battery because DoD is 60% for Lifepo4 it's 85-90%.
Huh Battery capacity in AH means nothing, lol a 48v 200Ah Battery is 9600 Watt hours….. Actually this is very bad information and I advise that no one follow this as it is wrong in so many ways I don’t even know where even to start.
Hello, I got two 400w solar panels, 3kva hybrid inverter and 200ah batteries. My problem is I can't connect fridge during the day but my wife and children watches Netflix till 6pm then once the sunset, we can't put light on but TV plays till 7h45pm meaning the batteries runs for 2hrs.what can be wrong? Please advise I m in South Africa.
Thanks for watching, check and calculate load and number of watts. How many hours is required for each load. Then calculate the total watt hours. Refrigerator Watts?. Check the wiring, maybe an unnecessary load is connected.
HI, thanks for the video, I came here to refresh my memory. Your video is well executed; however, you have made quite a few blunders that will almost definitely confuse someone who uses this video as a primary source of understanding.
6:11 - Power required from Solar Panel ... take note of your formula... the result is in Watts.
7:17 - Power required from Solar Panel = 3240/(5.84*0.73) = 759.99 = 760 Watts - You can then round this off to 1000W for simplicity.
8:30 - the power required from solar panels should be in Watts (W) and not kilo Watt hours (kWh)
Output power of solar panels are in Watts (W). For those who don't know where the 250 came from. May I suggest you add a note saying that you chose this particular size panel for this example :)
Anyway, you get the point I hope. Great visual execution but pay a bit more attention to your final product. You obviously understand what you're doing but there were unnecessary mistakes.
Thanks for clearing the mistakes in the video, but did he approximate to 1000W? is there a formula to use or a standard?
Why did you multiplied to find the power required from the PV when the formula you put clearly indicates division?
Very nice presentation . Thanks for your kind sharing.
Helpful for beginners but could be 5 minutes, maximum
Hello! Please I have one question I need to ask, the systeme efficiency it is for aller over PV systeme or they are changing?
Thanks for the post. How did you get value 833W as power required from solar panel resolving the formula (3240X5.84X0.73). It gives a value as 13812.768 not 833W per panel. Pl explain. Thanks
I think the formala has been wrongly applied here. It should be 3240/(5.84x0. 72). Still I do not get 833w
@@akshayramloll872 yeh, and the result is 800
I thought I was doing something wrong when I tried it too.
@@akshayramloll872 😂
The formula was OK, but it's implementation is wrong and can mislead the whole results.
Thank you very clear steps,,,,,,,,,,
Eagle eyed observation👍🏿
TNice tutorials guy's tutorial is more understanding than the others
Very clear calculation sir
Thanks and welcome
Excellent tutorial.
The formulas are not consistent with the calculations. However, this work is very informative
thanks for your presentation.
Great presentation, thank you.
Amazing
Your video is the best
Good lesson thanks.
This is good
Thanks
Educative ❤
I like it.
Thanks very much bro for that new approach
My pleasure!
where is wire sizes calculation sir? thanks for the great vdo.
Based on the formula in (5.30 sec)
Power Required from Solar panel (W )= (Total Energy (Wh) / Efective Sunschine hours x System Eficiency)
We apply the formula in (5.30 sec) and we get not 833 W but we get 760W for "Power Required from Solar panel"
I agree and there is an error in the algebra it say x instead of divide !!
@@nicholaskornjaca104
I get 802w.........==>>>> 3420/(5.84 x 0.73) = 802w not 833w.
please check my math!
THX
the correct one is 760W@@KapahiR
Approximately 763W :) cheers
Correct. @@WirdunaRobbani
Hi, I like your presentation, but, I have a question, at minute 7:39, how did you get the 833 watts?
He did a mistake, the correct calculation is to divide 3240 by the multiplication of (5.84*0.73), and the result is 800.
There is an error there of division he multiplied instead. YES I ALSO NOTICED
@@yhasanmm Actually, 760W.
P
@@itorres008 correct answer is 763w
Helpful! Informative! But I think the right way of choosing charge controller is by identifying the configuration of the solar pv panels and calculating the total (Isc) short circuit current of the array. I also want to emphasize that on designing Solar-off-grid sytem, the autonomy days without sunlight will depend on the location of the installation. Just like in Philippines where sunlight is minimal during rain storms and other weather conditions that usually lasts for 6 days.
Yes, you are right
Please sir reply to this comment please i have one question to ask.
Initially you wrote the formula for( power required from solar pv in watts)= total energy required from solar PV(wh)/effective sunshine hours x system efficiency
But later in the video after calculating system efficiency you multiply all the terms instead of divide.
You did----> power required from solar panel= total energy required x effective sunshine hours x system efficiency.
Which one is right?
= 3240 x 5.84 x 0.73 this gives 13812.768W
IF I DO
=3240/ 5.84X 0.73= 760Watts
Which one is right? Please clear this doubt please
nice
First of all, thank a lot for great explaination,
Can this calculation consider for inverter (controller bulid in with inverter)
Or need another way to calculate
In power required from panel, you multiply sunshine hours with energy... In formula its devision
Cables sizing and protective equipment for various appliances used was not mentioned.
Nice informative video, good luck.
Thanks
The fond music is enervant. Some repetition on the calcul is not better. Keep the constant calcul until the end. Keep going.
Congratulations for your video. Considering your exemple of calculation, please let me know if batteries are connected in series or parallel. Thanks.
Parallel
Please make clarification on 833watts
Thank you.....
Very informative! Helped me better assess my current small solar system. I am stilly fuzzy on the relevance of calculating the charge controller current. I understand the functions of the controller, but don’t see how knowing the 83 amps relates to the rest of the system. Still looking . Thx!
Excellent!, Thanks for watching
i have a 286,650kwh in my bill statement. Should i just divide by 30 to get the daily consumption and continue with your formula to get the sizing of the solar panel needed.
Nice video. Very well done I miss the voice though.
Thanks for your explanation
Kindly explain how yiu arrived at 833 watt.Based on the formula gave 833watt is not correct.pls kindly explain this.Thanks
1) If the total daily power is 3240 wouldn't you need to DIVIDE by the hours of sunlight (5.84) to get the hourly rating of the solar panel needed?
2) Don't you also need to DIVIDE by the system efficiency? SO if the efficiency were very low (e.g. .50) you would need more power. And if it were high (close to 1) it would be near the output power?
If 1 & 2 make sense that would give Power as 3240*(1/5.84)*(1/0.73) = ~760W
I thought the same too
Yes. This video has so many things wrong it should be taken down.
I agree with you
Max power 270, open circuit voltage 39, short circuit voltage 9.18, voltage at maximum power 30.9 current at max power 8.73,,, max system voltage 1000, series fuse rating 20A, ... I have 15 panel can give me calculations
Step 2: how does 3240 come up? For the total back up energy per day
👍Nice video bro..
This video is mostly animations and flawed information. The formulas are not presented correctly the hours of sunlight and efficiency should be divisors, as the first slide labeled "Step 2" showed. on the next slide they appear as multipliers - a wrong formula. The number 833W appears out of nowhere and is not equal to 3240 x 5.84 x .73, which is over 13,800W.
What is the point of finding and multiplying so many coefficients of efficiency if in the end you're just going to round up 833W to 1000W arbitrarily?
On calculating number of panels they divide by 250 as if all the panels in the world generate 250W.
And also, they are using the wrong units in certain places, like in the solar panel calculations the output of a panel is measured in Watts, not Watt hours.
Please what do you mean by Backup day? Did you meant the time that battery will charge fully or what? Thank you 🙏
I think these are the days sunshine will not be available like on cloudy or rainy days. We sometimes call it days of autonomy
good evening the 833w. how are they coming out. thanks
Do u have video of sizing of generator
Can you please explain “Power Required from Solar Panel = 3240 x 5.84 x 0.73 & according to you it’s 833 Watts” then it’s rounded to 1000 Watts.
I am not clear about the way you get 833 Watts.
Please help me to understand this
He did a mistake, the correct calculation is to divide 3240 by the multiplication of (5.84*0.73), and the result is 800.
@@yhasanmm the result is 759,99 W!
@@carlossimoescampos1 Sure, I did approximation
the answer was supposed to be 760w since it was division not multiplication
Sir pwede po kau gawa ng video na 80% ang DOD ng battery para malaman po ang tamang computation.. maraming salamat po...
Multiply the solar power required per hour with the solar panel efficiency to get the total rated power.
Your power / energy required per day needs to be calculated according to daylight? Hours of sun×energy= watt hrs
I didn't understand where the 442wh came from
Do you have something on how to determine battery bank voltage or pv array voltage voltage?Because I think they have a bearing
Utter balony !!
3240Wh should be DIVIDED by 5.84 sunhours to give the Power (W) required to produce that much energy in a day and that result should be DIVIDED by 0.73 to overcome the inefficiency giving 760W not 833W (which appears to be a totally random figure). Also how did 1000W (power) suddenly become 1000Wh (Energy) and then get divided into 4 x250W (back to Power again) panels.
'Total Power required per day' is totally meaningless. That number (442W) is simply the power that could be required at any instant if everything (all listed loads) were switched on at the same time.
The 5.84 sunhours is an anual average. To rate your system on 1 day of 'back-up' would mean that it would not work well, if at all in the winter when you are pretty much guaranteed to get fewer hours of useful sun.
No mention of batteries in series to raise the voltage and lower DC the current making all the electronics and cabling a lot cheaper. Who really wants an 83A (100A) charge controller or that kind of expensive heavy cabling or those kind of heat losses?
Sorry, where did you get output power of a solar panel from?
Has anybody solved the mystry of how the 800 watts is calculated?
where did you get the 442w total power required per day?
Need to learn calculations..how come 833w ??
At total power required per day 4:26 please how do you get 442W?
You need to add energy for battery charging then calculating PV panels. Battery size has to be calculated first.
On the average my electric bill states I use 800kw a year, except during the summer June, July and August being the highest of about 1,500kw, (Sept the watts start to go down to 800kw). Just knowing how many Kilo Watts I uses a year can I still use the same formula to determine my solar and wind power system for my home?
yes
So, I should set the system to the higher value of 1,500kw since it is my max. And if I do plan on using solar and wind power, the total watts should be reached combined of solar and wind.
On "states I use 800kw a year" you mean a month, right?
Hey guys can anybody explain to me how the 442w was calculated?
is the sum of the powers of the loads (see first table)
That’s the summation of TOTAL POWER ( Total Power Load x Number of such loads = Total Power
can anybody help me know this answer ( how we calculate effective sunshine hours in india ? )
I just simplified the formula at 8:39 to 9:39 as Number of PV panel required=(Total energy required (Wh))/(effective sunshine hours×output of PV panel×system efficiency). Any comments? Good or bad?
But according to the formula wasn’t the total energy required for solar panel supposed to be divided by the Efficient Sunlight hours and System efficiency???
On the charge controller sizing something's amiss
Agreed! Its oversize.
Calculation should be base on the maximum short circuit current of the PV system multiply by number of PV string multiply by safety factor normally 1.25
3240wh consumption is only under 280ah Lifepo4 battery, my formula is 280ah x 12.8v = 3584wh or maybe a 300ah lifepo4 Battery system. 400ah is too much
He should have included depth of discharge in his calculations. This way, there's a difference in battery size when using flooded batteries, lithium or AGM.
400ah isn't much if it's lead acid battery because DoD is 60% for Lifepo4 it's 85-90%.
Is there any term like” Total Power per day”? The term Power is appropriate.
I think it's total power required per hour
Where did you get 3420 or os that 3240?
Refrigarator 160W ??? 😁😁😁 , Which company ??? Power ratings 5++ stars !!!
and only 8 hours?
@@iaincrawford5472 , he is living in future 😂
@@Powercookers-y9e 😂
-11:38 something is wrong with the calculation
Huh Battery capacity in AH means nothing, lol a 48v 200Ah Battery is 9600 Watt hours….. Actually this is very bad information and I advise that no one follow this as it is wrong in so many ways I don’t even know where even to start.
indeed
the formula is correct but the calculation is wrong. True 6:15 wrong 7:59
I knew something was wrong 😂
Thanks for watching. sorry, a calculation error occurred.
@@CircuitInfo Thank you for the good explanation.
How did you get the AH?
Hi sir can you make a video on how many kilowatts can I save on Hybrid Grid tie per month on 1kw, 2kw, 3kw so on.😊
Just calculate it bro
Learn and calculate for God sake
Ok smart guy
solving correction Tip:
Power required from solar panel=
3240 / (0.73×5.84)
I though I was the only one that noticed. Even that correction gives you 760W approximately, not 833W.
@@voiceofinsight5811 yeah definitely, but that is the right way to solve
@@voiceofinsight5811 Thank God,I got 759.99.I knew it was a mistake
this nEC code 1.25 is for only US or for other countries as well. please clarify
You have copy pasted some calculation are not defined.
hello sir, from where you gate the 833 watts? if 3240 is multiplied by 5.84 and multiplied to 0.73? and that equal to 13812.768 watts
its still different from the video stated figure = 833 watts comparing to your updated result = 760 watts
Hello, I got two 400w solar panels, 3kva hybrid inverter and 200ah batteries. My problem is I can't connect fridge during the day but my wife and children watches Netflix till 6pm then once the sunset, we can't put light on but TV plays till 7h45pm meaning the batteries runs for 2hrs.what can be wrong? Please advise I m in South Africa.
Thanks for watching, check and calculate load and number of watts. How many hours is required for each load. Then calculate the total watt hours. Refrigerator Watts?. Check the wiring, maybe an unnecessary load is connected.
I don't understand where the 442w ❓
How can calculation
Please Watch one more time, u can understand.
Hhaa why naw 😢why do you change the handwriting 😢😢
ruclips.net/video/2EhaKj6waxo/видео.html
In above video link
Is this correct calculation of battery???
Please tell
good information but sad that 75% of the time of the video was spent watching the stupid hand write. Sorry, just being honest.
the inverter for my opinion is small if you happen to run all appliances it wont be enough mybe a 4000 or 5000 well do
Most of the formulas are wrongly applied
😢😢😢 don't end up frying your house.
Power Required from Solar panel is wrong in (5.30 sec) Fake calculations
1000 solar panel canot charge 400 ah battery in a day😂😂😂😂😂😂😂😂
In 5:35 and 7:35 min how was the calculation did?
I think it was wrong plz answer
Ok I got an answer for comments, thanks
Writing too slow
Change the playback speed... or verify the calculations as they go! 😁
Ur calculations don't make sense
You stop using that bloody handwriting movements.
The calculation are not right
U failed in maths? misleading calculation.
Don't follow these calculation, totally baseless.
कारण नही बताया है कि बेसलेश क्यो है?
WAY WAY WAY TO MANY FLAWS
Totally wrong, bad chanel
This is wrong
Thanks for watching, please suggest.
Helpful hint. Be concise. This video is long. 19:33. And more than the first minute was entirely waste. Gave up.