[TRNSYS-users] Problem withType 194b PV panel efficiency

[Santeri Siren]

Dear Trnsys users,

I am simulating a PV system in Finlands conditions using component 194b. My
problem is that system efficiencies are pretty low (7...8% at summer time). By
efficiency I mean produced power at maximum power point divided by the
total radiation of the sun [W/m2/W/m2].

I can affect the efficiency by growing parameter number 20 (IL). If I grow
this parameter, my efficiency also grows.  I checked the matematical
reference, and it says that IL = photocurrent. However I have no Idea what
kind of values should I give to this parameter. Does anyone know that
should I chande the default value of this parameter to something else?


Here are the products I used for parameters:

PV panels:
http://am.suntech-power.com/images/stories/pdf/datasheets/jun2012/STP240_Wde_Poly_35mmFrame.pdf<https://mail.aalto.fi/owa/redir.aspx?C=8LHY1PC5HU2JpAvOUvOogdFHYkwoXs8ImeeuOqFfiahYYb-xE77mmUM_w1LaswdMN3VtECxKbS8.&URL=http%3a%2f%2fam.suntech-power.com%2fimages%2fstories%2fpdf%2fdatasheets%2fjun2012%2fSTP240_Wde_Poly_35mmFrame.pdf>

Inverter (sunnyboy 5000TL):
http://www.sma-uk.com/en_UK/products/solar-inverters/sunny-boy/sunny-boy-3000tl-3600tl-4000tl-5000tl.html<https://mail.aalto.fi/owa/redir.aspx?C=8LHY1PC5HU2JpAvOUvOogdFHYkwoXs8ImeeuOqFfiahYYb-xE77mmUM_w1LaswdMN3VtECxKbS8.&URL=http%3a%2f%2fwww.sma-uk.com%2fen_UK%2fproducts%2fsolar-inverters%2fsunny-boy%2fsunny-boy-3000tl-3600tl-4000tl-5000tl.html>


Best regards,

Santeri Siren
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