of PV array output as a function of all the critical parameters
including geographic location, installation tilt, tracking
ability and other parameters giving monthly or annual
output projections (Marion et al., 2001). Most users are
interested in annual averages, which are then related to predictions
of pay-back periods based on the electricity value
compared to array installation cost. This average analysis
is based on the utilization of grid-connected solar arrays
that are always able to collect the sunlight that is available
and even feed it back to the grid when local usage is lower
than the power that is being generated, meaning that none
of the available sunlight is wasted; grid-connect PV arrays
are typically always ‘‘on”. Connecting this green source of
electricity with plug-in vehicles is an obvious next step that
can provide transportation with nearly zero green-house