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 the pdc0 is also used as a symbol in
pvwatts_ac()
. pdc0 in this function refers to the DC power of the modules at reference conditions. pdc0 inpvwatts_ac()
refers to the DC power input limit of the inverter.Parameters: - g_poa_effective (numeric) – Irradiance transmitted to the PV cells in units of W/m**2. To be fully consistent with PVWatts, the user must have already applied angle of incidence losses, but not soiling, spectral, etc.
- temp_cell (numeric) – Cell temperature in degrees C.
- pdc0 (numeric) – Power of the modules at 1000 W/m2 and cell reference temperature.
- gamma_pdc (numeric) – The temperature coefficient in units of 1/C. Typically -0.002 to -0.005 per degree C.
- temp_ref (numeric, default 25.0) – Cell reference temperature. PVWatts defines it to be 25 C and is included here for flexibility.
Returns: pdc (numeric) – DC power.
References
[1] A. P. Dobos, “PVWatts Version 5 Manual” http://pvwatts.nrel.gov/downloads/pvwattsv5.pdf (2014).