E-Bike & LiFePO4 Battery Charging Time, Amps & Electricity Cost Calculator

RÉSUMÉ TECHNIQUE & RÉPONSE DIRECTE • CC/CV CHARGING FORMULA

Charging Time (Hours) = (Ah Needed ÷ Charger Amps) + 0.55 Hours CV Balancing Tail. Charging a depleted 48V 15Ah (720Wh) battery from 20% to 100% takes ~6 hours 35 minutes with a standard 2A charger, or ~3 hours 30 minutes with a 4A fast charger, costing roughly €0.18–$0.22 in electricity.

System Nominal Voltage

Battery Capacity (Ah) 15 Ah

Charger Output Current (Amps) 3 A

Starting Battery Charge (%) 20%

Electricity Tariff (€/$ per kWh)

100% FULL BALANCED CHARGE TIME CC + CV PHASE

4h 33m Incl. 33m CV Balancing

STOPPING AT 80% SAVES 35+ MINUTES & DOUBLES CELL LIFE

FAST CHARGE TO 80% 3h 00m

ELECTRICITY COST €0.18 / $0.20

CELL CHARGE C-RATE (IDEAL ≤ 0.35C) 0.20C (Safe Longevity)