Interactive battery tool

Storage ROI Calculator

Estimate payback, lifetime savings, and return on investment using system cost, incentives, utility rates, and maintenance assumptions.

Methodology

How this calculator works

Payback is estimated from net battery system cost, electricity rate arbitrage, utility savings, rate escalation, maintenance cost, and system lifetime.
Incentives are treated as direct reductions to project cost, so eligibility and timing should be verified before relying on the estimate.
Financing terms, time-of-use policies, cycle degradation, tax details, and local utility programs can materially change the final economics.

Net cost = system cost - eligible incentives.
Year-one savings = annual production x electricity rate - estimated annual maintenance cost.
Payback occurs when cumulative annual savings exceed net cost; ROI compares lifetime net savings against the net cost.

Net system cost: The installed price after subtracting incentives you are eligible to claim. Financing fees may change the true cost.
Incentives: Federal, state, utility, or local programs that may reduce the project cost or improve the financial return.
Annual energy benefit: The expected yearly electricity benefit from the battery in kilowatt-hours, modeled from capacity, efficiency, and daily cycling assumptions.
Rate escalation: The expected yearly increase in electricity rates. Small changes can materially affect long-term savings.
Lifetime savings: Estimated savings over the analysis period after subtracting the net project cost and recurring maintenance assumptions.

Use the cost guide to review battery quote line items, incentive assumptions, and utility-rate details before making a buying decision.

Use the cost hub to check battery quote assumptions, incentives, utility rates, and payback drivers before choosing a system.

How this calculator works

Payback is estimated from net battery system cost, electricity rate arbitrage, utility savings, rate escalation, maintenance cost, and system lifetime.
Incentives are treated as direct reductions to project cost, so eligibility and timing should be verified before relying on the estimate.
Financing terms, time-of-use policies, cycle degradation, tax details, and local utility programs can materially change the final economics.

Net cost = system cost - eligible incentives.
Year-one savings = annual production x electricity rate - estimated annual maintenance cost.
Payback occurs when cumulative annual savings exceed net cost; ROI compares lifetime net savings against the net cost.

Net system cost: The installed price after subtracting incentives you are eligible to claim. Financing fees may change the true cost.
Incentives: Federal, state, utility, or local programs that may reduce the project cost or improve the financial return.
Annual energy benefit: The expected yearly electricity benefit from the battery in kilowatt-hours, modeled from capacity, efficiency, and daily cycling assumptions.
Rate escalation: The expected yearly increase in electricity rates. Small changes can materially affect long-term savings.
Lifetime savings: Estimated savings over the analysis period after subtracting the net project cost and recurring maintenance assumptions.

Use the cost guide to review battery quote line items, incentive assumptions, and utility-rate details before making a buying decision.

Use the cost hub to check battery quote assumptions, incentives, utility rates, and payback drivers before choosing a system.