The business models that have made solar systems financially viable for millions of homeowners in California, New England and elsewhere around the country are largely illegal in Florida, Virginia, South Carolina and some other Southern states. Companies that pioneered the industry, such as SolarCity Corp. and Sunrun Inc., do not even attempt to do business there.
What that appears to mean is that without the subsidies and questionable business practices, no one in their right mind would buy solar panels for their home. That may not be the case, but the fact that the article fails to spell it out, suggests that it is.