How Much Can Solar Save in Big Rock?

Real numbers based on current ComEd rates and Illinois incentives.

$180

Current Bill/mo

$157

Est. Lease + Battery

25+ yrs

Years of Pure Profit

$61,511

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

$180

Annual Cost

$2,160

25-Year Cost (No Solar)

$118,507

Your Solar Investment

8 kW System

$22,000

$9,383

After All IL Incentives

DG Rebate ($300/kW)-$2,400

Illinois Shines RECs (lump sum, ~18 mo)-$10,217

With vs Without Solar in Big Rock

Metric	Without Solar	With Solar
Monthly Cost	$180/mo	$132/mo (loan)
Monthly Cash Flow	-$0 (all to utility)	+$17/mo
5-Year Cost	$11,664	$7,920
25-Year Cost	$118,507	$56,996
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

$61,511

Without Solar

With Solar

Year 1Profit Starts Here

$2,160

$1,962

Year 5

$12,176

-$64

Year 10

$28,471

$11,167

Year 15

$50,276

$23,941

Year 20

$79,457

$38,913

Year 25

$118,507

$56,997

Year	Without Solar	With Solar	Cumulative Savings
Year 1Profit Starts	$2,160	$1,962	$198
Year 2	$4,450	-$6,262	$10,711
Year 3	$6,877	-$4,234	$11,110
Year 4	$9,449	-$2,169	$11,618
Year 5	$12,176	-$64	$12,240
Year 6	$15,067	$2,083	$12,984
Year 7	$18,131	$4,276	$13,855
Year 8	$21,379	$6,519	$14,860
Year 9	$24,821	$8,814	$16,007
Year 10	$28,471	$11,167	$17,304
Year 11	$32,339	$13,580	$18,759
Year 12	$36,439	$16,059	$20,380
Year 13	$40,785	$18,609	$22,176
Year 14	$45,393	$21,235	$24,158
Year 15	$50,276	$23,941	$26,335
Year 16	$55,453	$26,735	$28,718
Year 17	$60,940	$29,622	$31,318
Year 18	$66,756	$32,609	$34,147
Year 19	$72,922	$35,703	$37,218
Year 20	$79,457	$38,913	$40,544
Year 21	$86,384	$42,246	$44,138
Year 22	$93,727	$45,711	$48,016
Year 23	$101,511	$49,318	$52,193
Year 24	$109,762	$53,076	$56,686
Year 25	$118,507	$56,997	$61,511

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 Big Rock

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

Start Saving in Big Rock

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

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