The low cost Power Jack and SUN Grid Tie Inverters do well when connected to one solar panel. This video shows how they behave when connected with 2 and 3 identical panels. The wattage does increase, but due to the GTIs being only 75% efficient at full power, 2 and 3 panels configurations are not 2x and 3x higher output.
Still, these provide a slick way to slow your home utility meter down at a low cost.
Please see my other video on this topic.
Post time: Nov-01-2017