Inverter Loss over nominal inv. power

[Loïs Masson]

Hello,

I noticed something in the software regarding inverter loss over nominal inv. power :
The creation of a subfield for each MPPT in the system or t he grouping of multiple MPPTs into the same subfield leads to significant simulation differences (see the example below with an additional 3% in losses).

 

How PVSYST manages the repartition of strings when we don't create a subfield for each MPPT ? 

Is there a trick to avoid creating a subfield for each MPPT (to save time) without generating these losses?

 

Thanks you for your help

 

 

[Linda Thoren]

Hello,

When using the independent MPPT inputs feature, it is very important to have a multiple between the number of strings and MPPTs in each sub-array, or PVsyst can not equally distribute the strings over the MPPTs and you risk incorrect evaluation of the inverter losses over nominal inverter power. 

The MPPT and Power sharing feature is fully described in the following youtube tutorial: