DESCRIPTION

r.pv is an extension of r.sun. In addition to the solar radiation calculations of r.sun it uses temperature data to calculate the energy output of photovoltaic panels or arrays. For the details of the solar radiation calculations, see the r.sun documentation.

r.pv and its sister modules r.suntrack and r.sunyear are part of the PVMAPS software package. This package consists of these GRASS modules together with scripts giving examples of how to run the modules, and, most importantly, a large amount of input data to run the modules.

Like r.sun, r.pv can calculate either the instantaneous PV power for a single time and day, or it can calculate the total energy output for one day. In addition, it uses raster data for the air temperature to calculate the influence of irradiance and temperature on the PV power, according to the model described in Huld et al., 2010 and Huld et al., 2011.

All options are the same as for r.sun except for the following:

/p>

Coefficient file for the modelparameters option

The input to this option is the path to a simple text file containing one number on each line. The PV power model uses 7 coefficients as described in Huld et al., 2010. These are given as 7 numbers each on its own line. In addition there is an extra coefficient for the dependence of module temperature on air temperature and irradiance. hree sets of coefficients are supplied with the code, in the r.pv source directory.

REFERENCES

See also references in the documentation of r.sun.