Solar advocates continue to fight what they call a “discriminatory” fee added to the utility bills of Arizona Public Service customers who have solar panels. The “grid access charge” is a $2-3 monthly fee for customers with an average rooftop solar system. It was instituted last March and, after advocacy groups protested, upheld in a hearing in November. The Arizona Solar Energy Industries Association, Vote Solar and the Attorney General’s office filed a request for a re-hearing earlier this month.