Solar vs Grid Cost Calculator | Is Solar Worth It?

Compare the 25-year cost of solar vs staying on the grid. Factor in the 30% federal tax credit, loan payments, and rising utility rates to find your exact breakeven year and total savings.

Also known as: solar vs grid calculator · is solar worth it calculator · solar breakeven calculator · solar 25 year savings · solar vs electricity bill · solar cost comparison · solar net metering calculator

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System & Cost Inputs

Enter your electric bill, solar system details, and financing terms.

Monthly Electric Bill ($)

Your average monthly utility bill before going solar

Annual Utility Rate Increase (%)

US historical average is 3–5% per year

Solar System Cost ($)

Federal Tax Credit (%)

Federal ITC is 30% through 2032 for residential systems

State / Local Incentives ($)

Rebates, SREC credits, or other direct incentives

Annual Solar Production (kWh)

Expected yearly output from your solar system

Cash Purchase (no loan)

Loan Term (years)

Interest Rate (%)

Cost Comparison Summary

25-year cumulative cost: staying on grid vs going solar.

Net Solar Cost After Incentives

$12,600

You save $5,400 in credits & incentives

Monthly Loan Payment

$89

Annual Loan Payment

$1,068

Breakeven Year

Excellent

Year 1

Solar cumulative cost falls below grid in year 1

25-Year Total Savings

+$48,270

Grid total: $74,963 vs Solar total: $26,692

25yr on Grid

$74,963

25yr with Solar

$26,692

Year-by-Year Breakdown

25 years

Click to expand the full year-by-year cost comparison table

About Solar vs Grid Cost Comparison Calculator

Compare the 25-year cumulative cost of staying on the utility grid against going solar- factoring in federal tax credits, state incentives, loan financing, and rising electricity rates- so you can make a confident, data-driven energy decision.

Key Features

PMT-formula loan payment for accurate monthly and annual financing costs
Year-by-year breakeven detection across the full 25-year horizon
Federal ITC (30%) and custom state/local incentives applied to net cost
Collapsible year-by-year table with highlighted breakeven row
Cash purchase vs financed loan toggle- instantly recalculates
Multi-currency display — USD, EUR, GBP, INR, AUD, CAD, JPY and more
Live calculation- all outputs update as you type

Use Cases

Evaluate whether a solar installer's quote actually makes financial sense
Compare multiple loan terms and interest rates side-by-side
Estimate the impact of rising electricity rates on long-term savings
Present a clear cost breakdown to family members when deciding on solar
Benchmark state incentives to see how much they shorten the breakeven

Related Keywords

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How the Calculation Works

Net solar cost = system cost × (1 − federal credit %) − state incentives. Annual loan payment uses the standard PMT formula: P × r(1+r)^n / ((1+r)^n − 1). Grid cost each year compounds by the chosen annual rate increase. Breakeven is the first year where cumulative solar spending falls at or below cumulative grid spending. For cash purchases, the full net cost is treated as year-0 spending with $0 annual outlay thereafter.

Privacy & Security

All processing happens locally in your browser. Your data never leaves your computer, ensuring complete privacy and security.

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Frequently asked questions

What is Solar vs Grid Cost Calculator used for?

Compare the 25-year cost of solar vs staying on the grid. Factor in the 30% federal tax credit, loan payments, and rising utility rates to find your exact breakeven year and total savings.

Is Solar vs Grid Cost Calculator free to use?

Yes. Solar vs Grid Cost Calculator is completely free with no usage limits, and there is no paid tier required to use it.

Do I need an account to use Solar vs Grid Cost Calculator?

No. Solar vs Grid Cost Calculator works immediately in your browser with no signup, login, or email address required.

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