IL HB4524

Defines "plug-in solar energy system" as a moveable photovoltaic device that exports no more than 1,200 watts through a standard outlet and must be certified by Underwriters Laboratories or equivalent testing laboratory.

Prohibits electricity providers from requiring customers to obtain approval, pay fees, or install additional equipment to use plug-in solar systems; exempts these systems from interconnection requirements.

Excludes plug-in solar systems from eligibility for net electricity metering credits and distributed generation rebates, while shielding electricity providers from liability for damages caused by customer systems.

Systems with 391 watts or less output are exempt from building code alterations; landlords and homeowners' associations cannot restrict installation of these smaller systems in leases or rules created after the law takes effect.

Amends the Counties Code, Illinois Municipal Code, and Homeowners' Energy Policy Statement Act to include plug-in solar systems in the definition of "solar energy system."