Energy costs in Naperville, IL
Energy prices are published by state, not by city, so the rates and bills below are Illinois figures and apply to Naperville the same as anywhere else in the state. The solar production is different: that is modelled for Naperville's own coordinates, and it varies a lot within a single state.
Solar at Naperville's coordinates
8,001kWh a year from 6 kW
That is close to the Illinois average, so the state figure would not have misled you here. At 23.85¢ a kilowatt hour it pays back in about 6.3 years with full net metering.
Electricity · Illinois
23.85¢
per kWh, statewide ›
Typical bill · Illinois
$132
a month, statewide ›
Air conditioning
$266
a year, statewide ›
Heating
$1655
a season, statewide ›
Common questions
What is the electricity rate in Naperville?
23.85¢ per kilowatt hour. That is the Illinois residential average from the EIA — rates are published per state, not per city, so it applies across Naperville and the rest of Illinois alike.
What is the average electric bill in Naperville?
About $132 a month for a typical Illinois household. Again this is a state figure: EIA reports revenue and customer counts by state, so a city-level bill would be an invention.
Is solar worth it in Naperville?
A 6 kW system at Naperville's coordinates is modelled at about 8,001 kilowatt hours a year, which pays for itself in roughly 6.3 years at Illinois electricity prices with full net metering. This one is genuinely local — production is modelled for this point, not the state.
Other cities in Illinois
Everything for Illinois
Rates, bills, heating, cooling and solar for the whole state, with the working behind each figure.
Illinois energy costsCoordinates from the US Census Bureau place gazetteer. Solar production modelled by NREL PVWatts for those coordinates, south-facing at 20°. Prices from the US Energy Information Administration, residential sector, 2026-05, published per state.