How Much Can Solar Save in Darien?

Real numbers based on current ComEd rates and Illinois incentives.

$209

Current Bill/mo

$172

Est. Lease + Battery

23+ yrs

Years of Pure Profit

$58,583

25-Year Savings

What You're Paying Now

Without solar, here's what ComEd electricity will cost you over time at 6% annual rate increases.

Monthly Bill

$209

Annual Cost

$2,508

25-Year Cost (No Solar)

$137,600

Your Solar Investment

12 kW System

$33,000

$17,675

After All IL Incentives

DG Rebate ($300/kW)-$3,600

Illinois Shines RECs (lump sum, ~18 mo)-$11,725

With vs Without Solar in Darien

Metric	Without Solar	With Solar
Monthly Cost	$209/mo	$199/mo (loan)
Monthly Cash Flow	-$0 (all to utility)	$-24/mo
5-Year Cost	$13,543	$11,940
25-Year Cost	$137,600	$79,017
Rate Control	None — utility sets rates	Fixed at $0.10/kWh (avg.) for 15 years
Home Value Impact	None	+$15,000–$25,000 (tax-exempt)

Your Solar Savings Over Time

Estimated 25-Year Total Savings

$58,583

Without Solar

With Solar

Year 1

$2,508

$2,801

Year 2Profit Starts Here

$5,166

-$6,086

Year 5

$14,138

$2,672

Year 10

$33,057

$18,295

Year 15

$58,376

$35,678

Year 20

$92,258

$55,569

Year 25

$137,600

$79,018

Year	Without Solar	With Solar	Cumulative Savings
Year 1	$2,508	$2,801	-$293
Year 2Profit Starts	$5,166	-$6,086	$11,253
Year 3	$7,984	-$3,210	$11,195
Year 4	$10,972	-$292	$11,263
Year 5	$14,138	$2,672	$11,466
Year 6	$17,494	$5,684	$11,810
Year 7	$21,052	$8,748	$12,304
Year 8	$24,823	$11,869	$12,954
Year 9	$28,820	$15,049	$13,771
Year 10	$33,057	$18,295	$14,762
Year 11	$37,549	$21,611	$15,938
Year 12	$42,310	$25,001	$17,309
Year 13	$47,356	$28,472	$18,885
Year 14	$52,706	$32,029	$20,677
Year 15	$58,376	$35,678	$22,698
Year 16	$64,387	$39,427	$24,960
Year 17	$70,758	$43,283	$27,475
Year 18	$77,511	$47,253	$30,259
Year 19	$84,670	$51,345	$33,325
Year 20	$92,258	$55,569	$36,689
Year 21	$100,302	$59,934	$40,367
Year 22	$108,828	$64,450	$44,377
Year 23	$117,866	$69,129	$48,737
Year 24	$127,445	$73,980	$53,465
Year 25	$137,600	$79,018	$58,583

Calculate YOUR Savings

Enter your actual ComEd bill to see a personalized 25-year savings projection.

$Enter Your Information

Average Monthly Electric Bill

Current Utility Rate ($/kWh)

Default: $0.16/kWh (ComEd & Ameren average)

Utility Rate Escalator: 4.5% per year

Conservative (2%)Historical Average (6%)Aggressive (10%)

How We Calculate Your Savings

This calculator uses your custom utility rate (default $0.16/kWh for Illinois) with a 4.5% annual escalator compared to our fixed lease rate of $0.10/kWh (avg.) for 15 years. A low-escalator option is also available for a lower starting payment. After the 15-year lease, you can keep the system for a low fair-market buyout — then your electricity cost drops to near-zero for the remaining life of the panels (25+ years). Your actual savings may vary based on your specific usage patterns and system size.

More Solar Resources for Darien

Solar IncentivesRECs, rebates & tax exemptions Electricity RatesRate trends & bill analysis Solar FAQCommon questions answered

Start Saving in Darien

Get a free, personalized solar analysis based on your actual ComEd bill and roof. Lease or own — we'll find the best option.

✓ $0 down lease, competitive cash pricing, or Solar for All — your choice

Get Your $0 Down Quote

ComEd rates projected to rise again next year. Lock in savings now.

Or call (618) 217-2001|Info@ltdsolarconsulting.com