[quote]Solar Panel Generation Factor for Ludhiana, Punjab, India?
2 posts - 1 author - Last post: May 12, 2010
Good Morning! We were going through how to design a Solar PV System, but got struck at a point how to derive Panel*
PV Watts also provides insolation values for many places around the world.
Russ
Thanks MarineLiner and Russ.
I also felt that this term is meaningless but Russ just see the link provided by marineliner.......www.leonics.com > Home - Options
They are doin PV sizing by using this term............and just check the example
I looked at their calculations. They made up a factor - nothing more.
You are better off following the calculations you find here - provided by Mike & Sunking. Mike & Sunking have explained more clearly what they are doing without using any 'magic sauce' called panel generation factor.
Russ, team. I have a question and appreciate your help. From the Nasa data base i got the average monthly solar irradiation on a horizontal surface. Is this enough or i should also calculate the solar irradiation on my tilted (under design) panels? I have a tilted roof at 16 Degrees on which i would like to install the panels. I found this program that when putting my latitude (33 Degrees), panel tilt angle (16 Degrees) and solar irradiation on a horizontal surface will calculate the solar irradiation on the tilted module. is this a better number? Here is the link.
Russ thanks. is there a mathematical equation that i can use to reach the size of panels needed? I am doing a research project and need to show my calculations. here are the data i have so far:
Daily power requirement is 8.96KWh/ day. Based on all appliances and their daily use (timing).
Solar irradiation at my location from NASA and taking the least sunny month of December is 3.34 KWh/m2/day. This is based on a 16 degrees fixed tilted PV arrays on my roof.
The question is how to go from these data to calculate the W peak. I know you don't believe in the panel generation factor. I agree with you. But how can I reach the W peak?
Russ thanks. is there a mathematical equation that i can use to reach the size of panels needed? I am doing a research project and need to show my calculations. here are the data i have so far:
Daily power requirement is 8.96KWh/ day. Based on all appliances and their daily use (timing).
Solar irradiation at my location from NASA and taking the least sunny month of December is 3.34 KWh/m2/day. This is based on a 16 degrees fixed tilted PV arrays on my roof.
The question is how to go from these data to calculate the W peak. I know you don't believe in the panel generation factor. I agree with you. But how can I reach the W peak?
Thanks for the help.
Best Regards
Alkhayam
Why is peak important you are looking at an overall daily consumption
So for 8.96 KWH per day lets round up to 9
assuming you are using an MPPT charge controller
Battery bank would need to be a minimum of 45000 Watt hours to allow for two days of no sun and not discharge the batteries more than 40%
45000 WH = 937 AH battery bank @48V (that's a big honking battery)
Now to generate that with PV would be a bit different
9 KWH x 1.5 / 3.5 or daily use x losses / sun hours or 3.87 KW of PV (round up to 4)
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