How Long Does It Take to Charge a Golf Cart Battery?
Charge time depends on three variables: battery capacity (Ah), charger output (amps), and battery chemistry (lead-acid vs. lithium). Here are realistic estimates for common setups.
Charge Time Formula
Approximate hours = (Capacity Ah × Depth of Discharge) ÷ Charger Amps × 1.15 (efficiency factor)
Example: 48V pack, 170 Ah capacity, 80% discharged, 15A charger:
(170 × 0.80) ÷ 15 × 1.15 = ~10.4 hours
Charge Times by System
36V Lead-Acid (6 × 6V, 225 Ah):
| Charger Amperage | From 50% | From Near Empty |
|---|---|---|
| 10A | 6–7 hours | 12–14 hours |
| 15A | 4–5 hours | 8–10 hours |
| 20A | 3–4 hours | 6–8 hours |
48V Lead-Acid (6 × 8V, 170 Ah):
| Charger Amperage | From 50% | From Near Empty |
|---|---|---|
| 15A | 4–5 hours | 8–10 hours |
| 20A | 3–4 hours | 6–8 hours |
| 25A | 2–3 hours | 5–6 hours |
48V Lithium (LiFePO₄, 100–160 Ah):
| Charger Amperage | From Near Empty |
|---|---|
| 15A | 4–6 hours |
| 20A | 3–4 hours |
| 30A | 2–3 hours |
72V Lithium:
| Charger Amperage | From Near Empty |
|---|---|
| 15A | 5–7 hours |
| 25A | 3–4 hours |
Tips for Faster Charging
- Don't wait until near-empty — topping off from 30–40% discharge takes only 2–3 hours
- Upgrade to a higher-amp charger — a 20A vs. 10A charger roughly halves charge time
- Lithium charges faster — LiFePO₄ accepts full charge rate until nearly full; lead-acid slows significantly in the last 20% of charge (absorption phase)
For charger recommendations matched to your cart, call 1-844-844-6638 or visit any TIGON location.