PV Solar + BESS without Grid Import

[Greg]

Hi,

I'm currently designing a 35 MWp grid-connected solar farm with a 100 MWh Battery Energy Storage System (BESS). The system is configured so that the BESS charges exclusively from the PV array — not from the grid.

However, after exporting the hourly data from PVsyst, I noticed that values appear for EFrGrid (energy from the grid). When reviewing the simulation settings, I couldn’t find an option to disable grid import explicitly.

Has anyone encountered this issue before? Is there a specific setting or workaround to ensure the simulation fully restricts energy import from the grid?

Any guidance would be appreciated. Thank you!

[Muhammed Sarikaya]

Dear Greg,

 

If you don’t want to import energy from the grid, it’s considered a stand-alone project. I suggest running your simulation as a stand-alone system.

In a grid-connected project, the grid supplies energy when the system can’t meet the user’s demand.

See my screenshot below:

 

Regards,