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1 If in a very simple PV system a charge controller without MPPT is used, we need to determine the current; not the
power.
2 The models in this section estimate the cell temperature, as this is the temperature that affects the performance of
the PV module.
3 https://sam.nrel.gov/content/component-databases
4 http://prod.sandia.gov/techlib/access-control.cgi/2007/075036.pdf