That pretty well sums it up in terms of panel, as well as battery pack, sizing. The calculator gives what I consider to be minimum values. In making your final hardware choices, go for the next size bigger IMO and experience. At 40 degrees North latitude, I’ve found that a 6W minimum size panel is what you need as reliable starting point.
For more info on such basic user friendly set-ups, along with lots of pics, visit the UMESH thread: Urbana, Illinois, Now a goTenna Mesh Ambassador City!