Calcolatrice Capacità Batteria — Formula

Battery Capacity Sizing

Battery capacity must account for the load, duration, efficiency losses, and depth-of-discharge limits.

Formula

Required Ah = (P / V) x Hours / Efficiency / DoD

where P is load power in watts, V is battery voltage, Hours is the backup duration, Efficiency accounts for inverter and wiring losses, and DoD is the maximum allowable depth of discharge (to protect battery life).

Esempio Risolto

500 W load on a 48V battery system for 4 hours, 80% DoD, 90% efficiency.

  1. Load current = 500 / 48 = 10.42 A
  2. Usable capacity = 10.42 x 4 / 0.90 = 46.3 Ah
  3. Total capacity = 46.3 / 0.80 = 57.9 Ah
  4. Battery energy = 57.9 x 48 / 1000 = 2.78 kWh