Battery Runtime
Hours of runtime from Ah, voltage, depth of discharge, and load (optional Peukert).
Example
You enter
- Battery capacity (Ah) 100
- System voltage (V) 12
- Depth of discharge (%) 80
- Load (W) 120
- Peukert exponent k (1 if unknown) 1
You get
- Runtime (hours) 8 hr
- Runtime (minutes) 480 min
- Usable energy 960 Wh
Details, formula, and sources
Runtime = (battery_Wh × inverter_efficiency × depth_of_discharge) / load_W. Coulombic adjustments via Peukert exponent for lead-acid only.
Battery-chemistry physical facts; manufacturer datasheets by name.
Datasheets free on each manufacturer site.
Estimate. AHJ and licensed electrician govern. Verify against the NEC edition adopted in your jurisdiction.
Field names used by the API: amp_hours, system_V, dod_percent, load_W, peukert_k, hours, minutes, usable_Wh
- Inverter efficiency 100% (DC / ideal) unless user supplies; enter ~90% for an AC load through an inverterengineering practice
- DoD limit user-supplied depth of discharge (default 100%); typical practice is 80% LFP / 50% lead-acidmanufacturer typical