The data that I've seen shows that the barriers to solar adoption for the average American home are high installation cost, low grid power cost, unfavorable net metering agreements for grid interconnect, and even some pushback from neighborhood committees (homeowners association aka HOA).
There are exceptions such as Hawaii where grid power is expensive and sunshine abundant, but the US is big, geographically diverse, and because of that adoption varies greatly on regional dynamics.
There are exceptions such as Hawaii where grid power is expensive and sunshine abundant, but the US is big, geographically diverse, and because of that adoption varies greatly on regional dynamics.