Solar array sizing
A deterministic calculation from daily demand and expected yield. This is not a certified design.
Estimated array power1,143 W
3000 Wh ÷ 3.5 h ÷ (75 / 100)
The initial example is not a Romania forecast. Choose hours for the location and design month from PVGIS. Count losses once; size storage and the controller separately. The estimate excludes recovery after several low-solar days.