Daily module generation DIFFERENCE

[M Carba]

So, I've been studying the generation of an installation with different orientations and inclinations. 

Installation data:

- 240 modules JA Solar JAM72S20-460/MR - 460 Wp

- Inverter Huawei  SUN2000-100KTL-M1

I've made this chart, where we can see different orientations with 10º inclination.

Orientation	Generation (kWh/Any)	Efficiency (kWh/kWp)	PR (%)
-150	119624	1083,33	79,20
-120	123290	1116,53	79,20
-90	128827	1166,69	79,30
-60	134720	1220,06	79,40
-30	139415	1262,59	79,50
0	141660	1282,93	79,50
30	140858	1275,66	79,50
60	137242	1242,91	79,50
90	131756	1193,21	79,50
120	125862	1139,83	79,40
150	121122	1096,89	79,30
180	118827	1076,11	79,20

 

As you can see, when it's orientated est (negative orientation) it produces more than at west and I can't figure out why.

I don't exactly know how PVSol calculates it generation parameters, but I have a guess that most of this difference is due to the module heat. 

I'd like to know if there's another parameter that I'm missing such as the pollution throught out the day or that clouds are denser in the afternooon than in the mornign.

Thank you

[developer_fw]

Hi M Carba,

welcome to the forum and sorry for the belated answer!

The greatest impact on the simulation results is caused by the incoming climate data. I do want to refer you to the following answer in a previous thread:

Best regards,
Frederik

[M Carba]

Hi Frederik,

Thanks for the link to the post, I'll investigate different types of climate data.

Yours,

Carba