Estimate combined solar and battery savings, bill savings, battery savings, backup value, incentives, net system cost, payback period, lifetime savings, and ROI. Use this calculator to compare the value of a solar-only system against a solar-plus-battery system.
Combined savings mode:
The calculator adds solar bill savings, battery savings, time-of-use savings, demand savings, export value, and backup value.
Solar-only comparison mode:
The calculator compares a solar-only system against a solar-plus-battery system to estimate the extra value of adding battery storage.
Backup value mode:
The calculator includes estimated outage protection value as part of the annual savings estimate.
Payback mode:
The calculator compares net cost after incentives against annual savings to estimate payback period, ROI, and lifetime net savings.
A solar plus battery savings calculator helps estimate whether adding battery storage to solar panels may be worth the extra cost.
It can help compare solar-only savings, battery savings, backup value, time-of-use savings, net cost, payback period, ROI, battery replacement cost, and lifetime savings.
Your result shows estimated monthly savings, annual net savings, net system cost after incentives, payback period, lifetime net savings, ROI, battery-added value, solar-only comparison, battery replacement impact, and total value from backup and bill savings.
Add monthly solar bill savings, battery savings, demand charge savings, time-of-use savings, and backup value. Then subtract maintenance, net system cost, and replacement costs to estimate lifetime savings.
Not always. A battery can increase savings when it helps avoid peak rates, reduces demand charges, stores excess solar that would be exported cheaply, or provides backup value during outages.
Backup value is the estimated yearly value of having power during outages. It can include avoided generator fuel, avoided food loss, business continuity, comfort, or emergency protection.
Batteries may not last as long as solar panels. Including a future replacement cost gives a more realistic lifetime savings estimate.
No. This is an estimate. Actual savings can vary based on utility rates, net metering, time-of-use rates, battery settings, outage frequency, incentives, battery life, maintenance, solar production, and local policy.