Pvwattsv1Poa

Wrapper for SAM Simulation Core model: cmod_pvwattsv1_poa.cpp

Input Consistency Warning

As described in Possible Problems, some input parameters are interdependent but the equations that enforce consistency are not available in this PySAM module. Therefore, the onus is on the PySAM user to check that interdependencies are correctly handled. The variables which may require additional logic include:

Provided for each of these inputs is a list of other inputs that are potentially interdependent.

Creating an Instance

Refer to the Initializing a Model page for details on the different ways to create an instance of a PySAM class.

Pvwattsv1Poa model description

Pvwattsv1Poa

PySAM.Pvwattsv1Poa.default(config) → Pvwattsv1Poa

Use default attributes None

PySAM.Pvwattsv1Poa.from_existing(data, optional config) → Pvwattsv1Poa

Share underlying data with an existing PySAM class. If config provided, default attributes are loaded otherwise.

PySAM.Pvwattsv1Poa.new() → Pvwattsv1Poa
PySAM.Pvwattsv1Poa.wrap(ssc_data_t) → Pvwattsv1Poa

Use existing PySSC data

Warning

Do not call PySSC.data_free on the ssc_data_t provided to wrap

Functions

class PySAM.Pvwattsv1Poa.Pvwattsv1Poa

This class contains all the variable information for running a simulation. Variables are grouped together in the subclasses as properties. If property assignments are the wrong type, an error is thrown.

assign(dict) → None

Assign attributes from nested dictionary, except for Outputs

nested_dict = { 'Weather': { var: val, ...}, ...}

execute(int verbosity) → None

Execute simulation with verbosity level 0 (default) or 1

export() → dict

Export attributes into nested dictionary

unassign(name) → None

Unassign a value in any of the variable groups.

value(name, optional value) → Union[None, float, dict, sequence, str]

Get or set by name a value in any of the variable groups.

Weather Group

class PySAM.Pvwattsv1Poa.Pvwattsv1Poa.Weather
assign() → None

Assign attributes from dictionary

Weather_vals = { var: val, ...}

export() → dict

Export attributes into dictionary

beam

Direct normal radiation [W/m2]

Required: True

Type:sequence
incidence

Incidence angle to surface [deg]

Constraints: LENGTH_EQUAL=beam

Required: True

Type:sequence
poa_beam

Incident direct normal radiation [W/m2]

Constraints: LENGTH_EQUAL=beam

Required: True

Type:sequence
poa_gnddiff

Incident ground diffuse irradiance [W/m2]

Constraints: LENGTH_EQUAL=beam

Required: True

Type:sequence
poa_skydiff

Incident sky diffuse radiation [W/m2]

Constraints: LENGTH_EQUAL=beam

Required: True

Type:sequence
tdry

Dry bulb temperature [‘C]

Constraints: LENGTH_EQUAL=beam

Required: True

Type:sequence
wspd

Wind speed [m/s]

Constraints: LENGTH_EQUAL=beam

Required: True

Type:sequence

PVWatts Group

class PySAM.Pvwattsv1Poa.Pvwattsv1Poa.PVWatts
assign() → None

Assign attributes from dictionary

PVWatts_vals = { var: val, ...}

export() → dict

Export attributes into dictionary

derate

System derate value [frac]

Constraints: MIN=0,MAX=1

Required: True

Type:float
gamma

Max power temperature coefficient [%/’C]

Required: If not provided, assumed to be -0.5

Type:float
inoct

Nominal operating cell temperature [‘C]

Constraints: POSITIVE

Required: If not provided, assumed to be 45.0

Type:float
inv_eff

Inverter efficiency at rated power [frac]

Constraints: MIN=0,MAX=1

Required: If not provided, assumed to be 0.92

Type:float
step

Time step of input data [sec]

Constraints: POSITIVE

Required: If not provided, assumed to be 3600

Type:float
system_size

Nameplate capacity [kW]

Constraints: MIN=0.5,MAX=100000

Required: True

Type:float
t_ref

Reference cell temperature [‘C]

Constraints: POSITIVE

Required: If not provided, assumed to be 25.0

Type:float

Outputs Group

class PySAM.Pvwattsv1Poa.Pvwattsv1Poa.Outputs
assign() → None

Assign attributes from dictionary

Outputs_vals = { var: val, ...}

export() → dict

Export attributes into dictionary

ac

AC system output [kWhac]

Type:sequence
dc

DC array output [kWhdc]

Type:sequence
tcell

Cell temperature [‘C]

Type:sequence