Unnecessary Grid Usage Despite Available Solar – How to Prioritize Self-Consumption?

[OSS_QV]

PVsyst 8.0: I’m modeling a grid-tied, zero-export PV system (no batteries) and encountering an issue where the grid supplies power even when solar generation is available.For example, in January, Solar should cover all possible load (73.7 + 82.2 ≈ 156 MWh), leaving only 25 MWh to the grid. Instead, the grid supplies 107.5 MWh, and 82.2 MWh of solar is wasted.

I have set grid limitation to 0 kW (no export) and applied at the inverter level.