Solar Roi Calculator

Free online Solar Roi Calculator for Climate & Energy Calculators. Enter your values to get an instant, transparent result you can trust.

Monthly Electric Bill (currency) *

Electricity Rate (currency/kWh) *

Usable Roof Area (sq.ft) *

Peak Sun Hours (NREL-style) (hrs/day) *

Panel Tier *

Add Battery Storage? *

Battery Installed Cost (currency)

Federal Credit % (0 for 2026+ installs) (%)

State / Utility Incentive (currency)

Loan APR (0 = cash) (%)

Net-Metering Credit Factor (× retail)

Electricity Price Appreciation (%/yr)

Panel Degradation (%/yr)

Analysis Horizon (years) *

Grid Emissions Factor (kg CO₂/kWh)

Estimates only — not professional financial, medical, legal or engineering advice. Read full disclaimer.

Result

Fill in the form and click Calculate to see your result here.

How it's calculated

This Solar Roi Calculator applies a standard solar roi approach using the inputs you enter (your values). Intermediate steps may be shown in the results breakdown. Always confirm that units and assumptions match your use case before relying on the output.

Example

Example: Solar Roi Calculator

Inputs

Monthly Bill: 180
Kwh Rate: 0.16
Roof Sqft: 600
Sun Hours: 4.8
Panel Tier: standard
Include Battery: no
Battery Cost: 12000
Federal Credit Pct: 0
State Incentive: 0
Financing Apr: 0
Net Metering: 1
Price Escalation: 3
Degradation: 0.5
Horizon Years: 20
Grid Kg Co2 Per Kwh: 0.4

Outputs

System Size Kw: 9
Gross Installed Cost: 27000
Net Cost After Incentives: 27000
Year1 Production Kwh: 12929.76
Payback Years: 12
Savings 20yr: 52766.09
Irr Pct: 6.8
Battery Payback Years: n/a
Lifetime Co2 Avoided Tons: 98.7

This example uses typical sample values. Adjust the inputs above to see how the results change for your own numbers.

About this calculator

The Solar Roi Calculator helps you work out accurate results for solar roi without spreadsheets or guesswork. It belongs to our Climate & Energy Calculators tools and is designed for students, professionals and everyday users who need a clear answer fast. Provide your values, then review the primary result and any breakdown shown on the page. Use the worked example as a starting point, adjust the inputs to match your situation, and double-check critical decisions with a qualified professional when the stakes are high. AI Calculator Hub keeps the underlying approach transparent so you can understand how the number was produced, not just what it is.

Frequently Asked Questions

Enter your values in the form above, then click Calculate. The result updates instantly. You can reset the form or try the sample example to learn the expected inputs.

Yes. You can use this calculator on AI Calculator Hub without paying. Creating a free account lets you save results and favorites for later.

Results follow commonly used solar roi methods for Climate & Energy Calculators. Accuracy depends on correct inputs and units. For legal, medical, structural or financial decisions, verify with a qualified professional.

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