Home Battery Storage Payback Calculator

Compare home battery options side by side. Calculate your payback period, NPV, IRR, and total savings with solar + storage.

Configure Your System

Quick Battery Preset

Installation Cost ($)

Battery Capacity (kWh)

Usable Capacity (%)

Round-Trip Efficiency (%)

Daily Solar Surplus (kWh)

Analysis Period (years)

Time-of-Use Rates

Peak Rate ($/kWh)

Off-Peak Rate ($/kWh)

Shoulder Rate ($/kWh)

Peak Hours / Day

Grid Export Rate ($/kWh)

Incentives & Degradation

Federal IRA Credit (%)

State/Local Incentive ($)

Annual Degradation (%)

Electricity Rate Escalation (%/yr)

Discount Rate (%)

Backup Power Value

Outages per Year

Avg Outage Duration (hrs)

Critical Load (kW)

Value of Backup ($/hr)

Payback Period

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10-Year NPV

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20-Year NPV

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Effective IRR

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Annual Savings Breakdown

Peak Shaving Savings

$0/yr

Shifting solar to peak hours

Backup Power Value

$0/yr

Outage protection value

Net Cost After Incentives

After federal & state credits

Cumulative Cash Flow Over Time

Battery Degradation & Annual Savings

Year	Capacity (kWh)	Peak Savings	Backup Value	Total Savings	Cumulative

Compare Up to 3 Batteries

Select batteries to compare side by side with your current TOU rates.

Battery 1

Battery 2

Battery 3

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