Solar Panel Guidelines

The City of Naperville maintains these net metering standards for solar installations.

2025 Changes to Net Metering 

• Eliminate size restrictions on solar arrays in the City of Naperville.
• Allow self-supply City Utility customers to be credited for each kilowatt hour of energy delivered to the Utility on a 1 kilowatt hour to 1 kilowatt hour basis to offset the electric utility component of their monthly City utility bill (not including other Utility fees such as the Utility's meter fee and electric demand charge.)
• Allow monthly accumulation of energy credits where a self-supply customer over-produces (generates more electricity than can be used to offset the electric utility component of their utility bill) which credits will expire on March 31st in any year. This will allow those who over-produce solar energy over the summer to offset their winter electric utility bills when solar traditionally produces less energy.
• Provide for self-supply customers to be paid for expired credits at the rate of 4.9 cents per kWh in April of each year which represents the avoided cost rate (the value to the Utility of energy and capacity provided by intermittent solar resource).