pvpltools.module_efficiency.mpm6

pvpltools.module_efficiency.mpm6(irradiance, temperature, c1, c2, c3, c4, c6=0.0)

Calculate PV module efficiency using the MPM6 model (without windspeed).

The efficiency varies with irradiance and operating temperature and is determined by 5 parameters as described in [1]. A sixth parameter captures the effect of windspeed but is not used in this implementation.

Parameters:

• irradiance (non-negative numeric, W/m²) – The effective irradiance incident on the PV module.

• temperature (numeric, °C) – The module operating temperature.

• c1 (float) – Five model parameters usually determined by regression.

• c2 (float) – Five model parameters usually determined by regression.

• c3 (float) – Five model parameters usually determined by regression.

• c4 (float) – Five model parameters usually determined by regression.

• c6 (float) – Five model parameters usually determined by regression.

Returns:

eta – The efficiency of the module at the specified irradiance and temperature.

Return type:

numeric

See also

mpm5, fit_efficiency_model, adr

Notes

The author of MPM6 recommends the fitting constraint c6 <= 0.

A comprehensive comparison of efficiency models is found in [2] and [3].

References

[1]

S. Ransome and J. Sutterlueti, “How to Choose the Best Empirical Model for Optimum Energy Yield Predictions,” in 44th IEEE Photovoltaic Specialist Conference (PVSC), 2017, pp. 652-657.

[2]

A. Driesse and J. S. Stein, “From IEC 61853 power measurements to PV system simulations”, Sandia Report No. SAND2020-3877, 2020.

[3]

A. Driesse, M. Theristis and J. S. Stein, “A New Photovoltaic Module Efficiency Model for Energy Prediction and Rating”, forthcoming.

Author: Anton Driesse, PV Performance Labs

Examples using pvpltools.module_efficiency.mpm6

Module efficiency models

Module efficiency models