pvlib.pvsystem.pvwatts_dc#
- pvlib.pvsystem.pvwatts_dc(g_poa_effective, temp_cell, pdc0, gamma_pdc, temp_ref=25.0)[source]#
Implements NREL’s PVWatts DC power model. The PVWatts DC model [1] is:
\[P_{dc} = \frac{G_{poa eff}}{1000} P_{dc0} ( 1 + \gamma_{pdc} (T_{cell} - T_{ref}))\]Note that
pdc0is also used as a symbol inpvlib.inverter.pvwatts().pdc0in this function refers to the DC power of the modules at reference conditions.pdc0inpvlib.inverter.pvwatts()refers to the DC power input limit of the inverter.- Parameters:
g_poa_effective (numeric) – Irradiance transmitted to the PV cells. To be fully consistent with PVWatts, the user must have already applied angle of incidence losses, but not soiling, spectral, etc. [W/m^2]
temp_cell (numeric) – Cell temperature [C].
pdc0 (numeric) – Power of the modules at 1000 W/m^2 and cell reference temperature. [W]
gamma_pdc (numeric) – The temperature coefficient of power. Typically -0.002 to -0.005 per degree C. [1/C]
temp_ref (numeric, default 25.0) – Cell reference temperature. PVWatts defines it to be 25 C and is included here for flexibility. [C]
- Returns:
pdc (numeric) – DC power. [W]
References
