on grid system

[Eng_Ragy]

I want someone confirm my calculations it is right or wrong ?

Location: Alexandria , Egypt - Latitude and longitude ( 31 11 53 N / 29 55 9 E ) Average sunlight : 5.478 h

Total connected load = 738 KW/Day

So the peak power that i need = ( 738 / 5.478 ) = 134.7 KWp

but there is a lot of factor should i concern ( Inverter losses - Wiring losses ) assuming losses = 0.8

So The input power should enter the inverter will be 134.7/ 0.8 = 168.375 KWp

So i need 169 KWp system on grid to produce for me 738 KW/Day

about sizing:

Assuming i use poly-crystalline panel ( At STC << 25 C 1000 w/m2>> Pmax 235 w - 14.4% efficiency - Imp 8.03A - Vmp 29.3 V - Isc 8.58 A - Voc 37V )

(At cell operation << 20C 800 w/m2 Pmax 174 w - Imp 6.42A - Vmp 27.1 V - Isc 6.92 A - Voc 34.4 V)

Max. rating ( -40C to +85 C - 1000 VDC(EU)/ 600 VDC (US) - series fuse 20A(EU)/ 15 (US)

Temperature coefficient of Voc -0.30 %/C
Temperature coefficient of Isc 0.04 %/C
Temperature coefficient of Pmax -0.40 %/C

Area of module 1.640 * 0.992 = 1.62 m2

The area that i need to install this system will be

Number of modules = (169000/ 174 ) = 971.2 modules = 972 modules

So Area will be 972 * 1.62 (m2) = 1572.6 m2

My problems now :

1- how to select the inverter and how many inverter i need
2- in cloudy days how many KWp the system will produce ?
3- where can i check how many sunlight hours , Temperature and radiation in my location
4- i don't know the angel of module to get high performance
5- If my Electricity bill 0.08$/w. Is this system good for me

I am very interested to learn PV system , i need someone help me , suggest to me any online courses

I read a lot about pv system but still i cant design the system

Sorry for long thread

Thanks and Best Regards
Ragy

[Naptown]

I want someone confirm my calculations it is right or wrong ?

Location: Alexandria , Egypt - Latitude and longitude ( 31 11 53 N / 29 55 9 E ) Average sunlight : 5.478 h

Total connected load = 738 KW/Day

So the peak power that i need = ( 738 / 5.478 ) = 134.7 KWp

but there is a lot of factor should i concern ( Inverter losses - Wiring losses ) assuming losses = 0.8

So The input power should enter the inverter will be 134.7/ 0.8 = 168.375 KWp

So i need 169 KWp system on grid to produce for me 738 KW/Day

about sizing:

Assuming i use poly-crystalline panel ( At STC << 25 C 1000 w/m2>> Pmax 235 w - 14.4% efficiency - Imp 8.03A - Vmp 29.3 V - Isc 8.58 A - Voc 37V )

(At cell operation << 20C 800 w/m2 Pmax 174 w - Imp 6.42A - Vmp 27.1 V - Isc 6.92 A - Voc 34.4 V)

Max. rating ( -40C to +85 C - 1000 VDC(EU)/ 600 VDC (US) - series fuse 20A(EU)/ 15 (US)

Temperature coefficient of Voc -0.30 %/C
Temperature coefficient of Isc 0.04 %/C
Temperature coefficient of Pmax -0.40 %/C

Area of module 1.640 * 0.992 = 1.62 m2

The area that i need to install this system will be

Number of modules = (169000/ 174 ) = 971.2 modules = 972 modules

So Area will be 972 * 1.62 (m2) = 1572.6 m2
Don't forget intermodule spacing if needed
My problems now :

1- how to select the inverter and how many inverter i need
You will need a minimum of 1-150KW inverter or multiple small ones
2- in cloudy days how many KWp the system will produce ?
3- where can i check how many sunlight hours , Temperature and radiation in my location
www.Gaisma.com
4- i don't know the angel of module to get high performance
Somewhere around 25^o
5- If my Electricity bill 0.08$/w. Is this system good for me
That is a value judgement only you can make

I am very interested to learn PV system , i need someone help me , suggest to me any online courses

I read a lot about pv system but still i cant design the system

Sorry for long thread

Thanks and Best Regards
Ragy

remarks in red

[Mike90250]

That's a very large plant, and you will need Grid and Utility approval to build it, in addition to needing to hire an electrical engineer for several weeks to do the electrical analysis. This is too big a project to make a mistake with.
Payback/feasibility will depend on your electrical rate, and grid tie rates.

[Eng_Ragy]

thanks a lot Mr Naptown

you think my first calculations and assuming is right ?

I really interested in this field can anyone suggest to me any online course or ebook

Best regards
Ragy

[e_techno]

That's a very large plant, and you will need Grid and Utility approval to build it, in addition to needing to hire an electrical engineer for several weeks to do the electrical analysis. This is too big a project to make a mistake with.
Payback/feasibility will depend on your electrical rate, and grid tie rates.

I intend to install a 5KW solar system on my existing residential house.
However, I think tilting the solar panel towards the ideal direction at 2° South (My location is 2.3000° N, 111.8167° East) will look a bit funny on my roof top.

Front panel of my roof is tilting 30 degree towards east-north east, and back panel of roof tilting the opposite direction of the front.

I am thinking of just installing panels according to the roof, but would like to have an rough idea of the percentage of energy I will loss due to the panel facing East-North East and West-South-West at 30°.

[russ]

I intend to install a 5KW solar system on my existing residential house.
However, I think tilting the solar panel towards the ideal direction at 2° South (My location is 2.3000° N, 111.8167° East) will look a bit funny on my roof top.

Front panel of my roof is tilting 30 degree towards east-north east, and back panel of roof tilting the opposite direction of the front.

I am thinking of just installing panels according to the roof, but would like to have an rough idea of the percentage of energy I will loss due to the panel facing East-North East and West-South-West at 30°.

e_techno is located in Kota Kinabalu, Malaysia for reference for guys to comment.

I was in KK many years back - in 1984 I was working in a plant located on Labuan - back then the only way to get to Labuan was through KK.
Russ