Definition of "AC Power Rating" and "AC Active Power"

[S.F.]

Dear PV-sol experts,

I have a question regarding the calculation of the dimension factor, influenced by the cos phi and the AC Power Rating of the inverter. 

 

1. When using the Huawei SUN2000-36KTL inverter with the posted output specs, PV-Sol is taking the "Rated AC active Power" (from data sheet, picture 1) both as the "AC Power Rating [kVA]" and as the "AC Active Power [kW] (cos(phi)=1)". (picture 2)

If i change the cos(phi) to 0,9, the  "AC Active Power [kW] (cos(phi)=0,9)" changes regarding to that (picture 3)

 

Actual question: It was my understanding, that the36KTL can bring up tu 40kVA apparent power, as seen in the data sheet. Shouldn't it be possible to use the 40kVA apparent power as active power in case of cos(phi)=1? 

 

Picture 1: Huawei SUN2000-36KTL inverter output specs

 

Picture 2: Huawei SUN2000-36KTL PV-Sol dimension wit cos(phi)=1

Picture 3: Huawei SUN2000-36KTL PV-Sol dimension wit cos(phi)=0,9

 

 

Thanks for thinking!

[developer_mm]

Hello S.F.,

welcome to our forum.

Your understanding of inverters is absolutely right. The "AC Power Rating [kVA]" should be 40 kVA. In the current PV*SOL premium 2018 version, the inverter has the correct specifications, as you can see in the picture.

 

I guess there are two possible reasons for this. The database entry could be incorrect or the inverter specification has been changed. It looks like you are using an older version of PV*SOL, I would recommend upgrading to PV*SOL premium 2018. We are constantly developing new features. Further information can be found here:

Program details: https://www.valentin-software.com/en/products/photovoltaics/57/pvsol-premium

Release Notes: https://www.valentin-software.com/en/support-service/customer-service/release-notes/pvsol-premium

 

However, you can also create your own inverter in the database. I would recommend that you copy the existing inverter and change the incorrect information according to the data sheet.

Kind regards,

Marcel

P.S. I have deleted your second and double entry in the german forum area.