Battery Chemistry Reference
Battery Voltage & State of Charge (SoC) Reference Chart
Open-circuit voltage (OCV) vs. State of Charge (SoC) reference tables for 12V, 24V, and 48V Lead-Acid (Flooded/AGM) and Lithium (LiFePO4/Li-ion) battery chemistries.
System Voltage Scale
| State of Charge (SoC %) | Lead-Acid (Flooded) | Lead-Acid (AGM Sealed) | LiFePO4 (Lithium Iron Phosphate) |
|---|---|---|---|
| 100% | 12.70 V | 12.80 V | 13.60 V |
| 90% | 12.50 V | 12.60 V | 13.30 V |
| 80% | 12.42 V | 12.50 V | 13.25 V |
| 70% | 12.32 V | 12.35 V | 13.20 V |
| 60% | 12.20 V | 12.25 V | 13.18 V |
| 50% | 12.06 V | 12.10 V | 13.15 V |
| 40% | 11.90 V | 11.95 V | 13.12 V |
| 30% | 11.75 V | 11.80 V | 13.05 V |
| 20% | 11.58 V | 11.65 V | 12.90 V |
| 10% | 11.31 V | 11.40 V | 12.80 V |
| 0% | 10.50 V | 10.50 V | 10.00 V |
Voltages reflect Open Circuit Voltage (OCV) measured at rest with no active charging or discharging load for at least 30 minutes at 25°C (77°F).