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PostPosted: Wed Jun 13, 2018 4:28 pm 

Joined: Wed Sep 12, 2012 11:53 pm
Posts: 13
We are seeing a lot of Bi-Facial module manufactures/products due to the cost and production gain. With that being said, how is PVSyst taking the electrical characteristic (isc and imp) into consideration since there is a percent gain due to the backside of the modules? See LG cutsheet for example http://www.lg.com/global/business/downl ... 2cells.pdf


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PostPosted: Wed Jun 13, 2018 11:08 pm 
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Joined: Mon Apr 16, 2012 7:29 pm
Posts: 1463
PVsyst uses the one-diode model established from the usual STC data (on front side).
When using the bifacial gain, the back-side irradiance is simply added to the GlobEff value on the front side, with a coefficient named the "Bifaciality factor".

The increase of ISC current with bifacial irradiance is not relevant. This is an operating condition. When you are using a module at anothe irradiance than 1000 W/m2, you don't take care of the ISC at this irradiance: this is a result of the model.


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