As of September 2026, the average storage system cost in Illinois is $1,283/kWh. Given a storage system size of 13 kWh, an average storage installation in Illinois ranges in cost from $14,181 to $19,185, with the average gross price for storage in Illinois coming in at $16,683. After accounting for state and local storage incentives, the net price you'll pay for solar can fall by thousands of dollars.
Importantly, these costs are typical for shoppers comparing storage quotes on the EnergySage Marketplace. When you compare quotes for solar panels and batteries on EnergySage's competitive marketplace, you can expect to see prices up to 20% lower than working with a single company.
System size | System cost |
|---|---|
10 kWh | $12,833 |
13 kWh | $16,683 |
20 kWh | $25,667 |
26 kWh | $33,367 |
Learn more about local IL incentives, tax credits & rebates.
$21,263 - $61,467
There are several variables that impact the price you pay for a solar + storage system: the quality of the equipment you install, the type of inverters you choose, and the storage capacity and chemistry of your battery. This is an average price range for solar + storage installations in your area, and the specifics of your project will change the final price you pay.
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See what storage costs in Illinois counties
- Adams County
- Boone County
- Bureau County
- Champaign County
- Christian County
- Clark County
- Clinton County
- Coles County
- Cook County
- Crawford County
- DeKalb County
- DuPage County
- Edgar County
- Effingham County
- Fayette County
- Franklin County
- Fulton County
- Greene County
- Grundy County
- Hancock County
- Henry County
- Iroquois County
- Jackson County
- Jefferson County
- Jersey County
- Jo Daviess County
- Kane County
- Kankakee County
- Kendall County
- Knox County
- La Salle County
- Lake County
- Lawrence County
- Lee County
- Livingston County
- Logan County
- Macon County
- Macoupin County
- Madison County
- Marion County
- Marshall County
- Mason County
- Massac County
- McDonough County
- McHenry County
- McLean County
- Mercer County
- Monroe County
- Montgomery County
- Morgan County
- Ogle County
- Peoria County
- Piatt County
- Randolph County
- Rock Island County
- Saline County
- Sangamon County
- Shelby County
- St. Clair County
- Stark County
- Stephenson County
- Tazewell County
- Union County
- Vermilion County
- Wabash County
- Warren County
- Wayne County
- White County
- Whiteside County
- Will County
- Williamson County
- Winnebago County
- Woodford County
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