Monthly energy output (kWh)
Tilt optimizer — annual yield vs tilt angle
Monthly data table
Model: Ineichen/Perez clear-sky · Hay-Davies transposition (direct+diffuse+reflected) · Monthly Kt by latitude band · Horizon shading integrated hourly.
Accuracy: ±10–15% vs satellite data. For final design use PVGIS or measured data.
Accuracy: ±10–15% vs satellite data. For final design use PVGIS or measured data.
Enter module and inverter datasheet values, then click “Calculate string sizing”.
Method: Neamţ §11 — eq. 3: VOC,max=VOC,STC·[1+λV/100·(Tmin−25)] ·
eq. 4: Tmin=Ta,min+(NMOT−20)·Gmin/800 ·
eq. 6: Vmp,min=Vmp,STC·[1+λV/100·(Tmax−25)] ·
eq. 7: Tmax=Ta,max+(NMOT−20)·Gmax/800.
Ns,max=⌊Vmax,inv/VOC,max⌋ · Ns,min=⌈Vmin,MPPT/Vmp,min⌉ · Nopt=⌊Vr,MPPT/Vmp,STC⌋ · Np,max=⌊Imax,MPPT/ISC,STC⌋.
Ns,max=⌊Vmax,inv/VOC,max⌋ · Ns,min=⌈Vmin,MPPT/Vmp,min⌉ · Nopt=⌊Vr,MPPT/Vmp,STC⌋ · Np,max=⌊Imax,MPPT/ISC,STC⌋.