Generator vs Battery Calculator

Compare the long-term ownership cost of a standby generator with the potential peak-demand savings of a FranklinWH whole-home battery.

Standby Generator

Backup power with recurring maintenance and fuel costs.

7-Year Warranty

Fully installed cost

Typical range used here: $10,000–$16,000

Annual maintenance plan

Typical range used here: $250–$500/year

Annual fuel cost

Starting estimate: $650/year

FranklinWH Whole-Home Battery

Grid-tied backup that can offset peak-demand energy costs.

15-Year Warranty

Fully installed cost

Typical range used here: $16,000–$18,000

Estimated monthly peak-demand savings

Typical estimate used here: $60–$120/month

Fuel & annual maintenance

Annual inflation / rate escalation

Comparison period

Generator total cost

Battery net cost after estimated savings

Estimated battery financial advantage

Generator total cost minus battery net cost

See what whole-home battery storage could look like for your home.
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Important: This calculator is an educational estimate, not a guaranteed savings quote. Generator costs, outage-related fuel use, utility rates, peak-demand charges, battery dispatch, incentives, financing, taxes, repairs, and system performance can vary. The model escalates recurring generator costs and estimated battery savings by the selected annual percentage.