Solar vs. Electricity Cost Comparison in Twin Falls, ID

See how solar energy compares to grid electricity costs over 25 years in Twin Falls. Based on local electricity rates of 11.5¢/kWh and an average monthly bill of $115, here is what homeowners can expect.

Year 9
Break-Even Point
$53,203
25-Year Grid Cost
$16,840
25-Year Solar Cost
$36,363
Total Savings

Cumulative Cost Over 25 Years

Year 9
Break-Even Point
$53,203
25-Year Grid Cost
$16,840
25-Year Solar Cost
$36,363
Total Savings

System Details for Twin Falls

Your Solar System

System Size
6.8 kW
Number of Panels
17
Gross Cost
$18,700
Federal Tax Credit (30%)
-$5,610
Net System Cost
$13,090

Local Energy Data

Electricity Rate
11.5¢/kWh
Average Monthly Bill
$115/mo
Peak Sun Hours
5 hours/day
Utility Company
Idaho Power
Net Metering
full
Annual Production (est.)
12,410 kWh

How We Calculate Your Cost Comparison

Our comparison projects costs over 25 years, the typical warranted lifespan of solar panels. Grid electricity costs assume a 3% annual rate increase, which aligns with the historical national average. Solar costs include the net system cost after federal and state tax credits, plus $150 per year for maintenance.

The break-even point is where the cumulative cost of solar drops below the cumulative cost of grid electricity. After this point, every year of solar use puts money back in your pocket compared to what you would have spent on traditional electricity.

Solar panel output degrades at approximately 0.5% per year, which is factored into our calculations. Even with this degradation, most systems produce over 87% of their original output at year 25.

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