Free Battery Planning ToolsFree Battery Calculators & Backup Sizing Tools

Runtime depends on battery usable capacity, your critical load draw, and inverter efficiency. A 10 kWh usable battery powering 1.5 kW of critical loads will last roughly 6–7 hours. Our Backup Runtime Estimator lets you model multiple scenarios with your actual load figures.

For most homeowners the answer is yes, especially after the Inflation Reduction Act expanded the 30% federal tax credit to standalone battery storage systems. Payback improves further in areas with high electricity rates, frequent outages, or time-of-use billing where batteries can shift loads to off-peak hours.

Yes. Since 2023, standalone battery systems qualify for the 30% federal Investment Tax Credit regardless of whether they are paired with solar panels. State and utility incentives may also apply depending on your location.

The primary factors are depth of discharge (how deeply the battery is regularly cycled), operating temperature, and charge rate. Lithium iron phosphate (LFP) batteries typically offer 3,000–6,000 warranted cycles at 80–100% depth of discharge. Keeping operating temperatures below 35°C and avoiding routine full discharges can extend practical service life significantly.