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Battery Charging Time Calculator
Charge time from current to target state of charge.
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Battery storage calculators
Battery sizing, backup runtime, payback, plus solar, rates, circuits, and load, each with visible math.
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Generator vs Battery Backup Comparison
Horizon backup cost of generator versus battery.
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Off-Grid Solar + Battery Sizer
Battery bank plus solar array for an off-grid site.
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Battery Replacement Budget Planner
Future battery cost and monthly savings reserve.
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Battery Degradation and Lifetime Estimator
Remaining cycles and lifetime throughput of a battery bank.
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Peak Shaving Savings Estimator
Demand-charge savings and battery size for shaving peak kW.
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Usable Battery Capacity (DoD) Calculator
Usable vs nameplate capacity by chemistry DoD and efficiency.
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Battery Series-Parallel Calculator
Pack voltage, Ah, and kWh from series/parallel cell counts.
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EV Battery Range and Charging Calculator
Range, charging time, and full-charge cost from pack size.
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Solar Battery Payback Calculator
Payback years and horizon net benefit of a home battery.
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