Inverter is a device that changes DC power to pure sine wave AC power, it consists of inverter bridge, control logic and smoothing circuit.
If you get hold of a copy of software you can carry out the analysis for any given location, azimuth and inclination. There is the option for single and dual axis tracking, giving you the opportunity to compare the figures for yourself. We use the software extensively when assessing best fit arrays to ensure highest yield. You'll be surprised at the difference matching the right power inverter with the right panels will make, even before you start tracking the sun's trajectory.
Software is very good but at the end of the day it's a math model based on averages. The resultant KW output generated in it's final report tends to be very conservative. Best to always double check it's figure's. I use it myself and it cuts way down the time needed to size the array to the inverter. Visit our website for more: http://www.inverter.co