bess PVsyst Storage Power Shifting (Fixed export to the grid before charging)

[Haziq]

Hi everyone, 

I am facing difficulties to configure the storage setting for charging strategy "Fixed export to the grid before charging".

For context, my hybrid PV + BESS plant size is: PV 62.5 MWp / 50 MWac with BESS usable capacity 25 MW / 100 MWh. Grid Lim = 50 MWac, with this understanding, for whatever value of PV production exceed 50 MWac e.g. (57.20 MWac - 50MWac = 7.20 MWac) shall be charge to the battery. But it did not show up as what i expect. 

The section configuration for System and Operation Info indicates my "best day energy fraction is INF%" how to solve this issue? Based on the report produced, it seems the battery is only discharge during the discharge window as config in Discharging Strategy. And not charging for the remaining days. 

Request for expert support to advice on this misunderstanding or error.

Solarvest ITA

[Robin Vincent]

There is a bug that changes the value from 25MW to 25000MW.

This leads to a battery that never charges, since the production never reaches this value.

We will try to fix this as soon as possible, but in the meantime you could set the value to 0.025 to get the correct behavior.

 

NB: the value displayed in the report for the charging power is also erroneous, as it is displayed in MJ/h instead of the indicated unit.