ength as all      other input vectors.</li><li><b><tt>nNsVth</tt></b> - the product of three components. 1) The usual diode ideal      factor (n), 2) the number of cells in series (Ns), and 3) the cell      thermal voltage under the desired IV curve conditions (Vth).      The thermal voltage of the cell (in volts) may be calculated as      k*Tcell/q, where k is Boltzmann's constant (J/K), Tcell is the      temperature of the p-n junction in Kelvin, and q is the elementary      charge of an electron (coulomb