PV capacity and inverter sizing

[PaulAdrian]

Hello, 

I am simulating a 12.5MWp ground mounted system, the following are the components based on layout:

20160 modules x 620Wp

35 inverters of  Sungrow  SG320HX -20@50 deg C

When I simulate it maintaining a 1.20 DC/AC ratio it can only provide me 11.58MWp, 18676 modules and 32 units of inverters.

Kindly advise how I can match the 12.5MWp capacity which is based on the layout and  the max cap we can put on the area?

Additionally how I can increase the number of my inverters to 35 x SG320HX -20@50 deg C?

looking forward to your kind assistance.

[Lazare Fesnien]

Dear Paul Adrian,

I think I didn't quite understand your question.

I don't know if you want to maintain the same DC/AC ratio of 1.20 or maintain the PV power ?
 

[PaulAdrian]

Hi Lazare,

I am aiming to maintain the power with 1.2 DC/AC Ratio.

[Lazare Fesnien]

If you want to maintain the power of the PV field and the ratio of 1.20 then you must act on the number of inverters and the power of the inverters
 

[PaulAdrian]

Hi Lazare,

For example,sub array 1, I wanted to maintain the 4183kWp , however when I click resize, it maintains the number of inverter and increases the DC/AC ratio to 1.3 instead.

Please see below:

 

Kindly advise how to work around it and manually increase the number of inverter?

[Lazare Fesnien]

Indeed in this case, as you need to maintain the DC/AC ratio of 1.20 you must manually modify the number of inverters in order to find the desired ratio

[PaulAdrian]

Noted, it means I have to un-tick the box of " Use multi-MPPT feature"?

[Lazare Fesnien]

No you can keep this box checked but instead of modifying the number of inverters you will have to modify the number of MPPT input in this case