LiFePO4 Charging Voltage Settings — Full Chart for 12V, 24V, 48V
· 3 min readBattery
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LiFePO4 voltage settings are specific enough that getting them wrong leads to under-charging or accelerated degradation. Here's the complete reference for all common system voltages.
12V LiFePO4 voltage settings
| Parameter | Setting | Notes |
|---|---|---|
| Absorption voltage | 14.2–14.6V | 14.4V is standard; most batteries specify 14.6V max |
| Float voltage | 13.5–13.6V | Or disable float entirely |
| Equalization | DISABLE | Destructive to LiFePO4 |
| Low voltage warning | 12.0V | Informational; BMS disconnects around 10.5–11.0V |
| Low voltage disconnect | 11.5V | Set in inverter/charger; BMS handles actual cutoff |
| Storage voltage (long-term) | 13.2–13.4V (approx 50% SoC) | For storage longer than 2 weeks |
Open circuit voltage reference (no load, no charge):
| Voltage (OCV) | Approx State of Charge |
|---|---|
| 13.4V | 100% |
| 13.3V | 90% |
| 13.25V | 70% |
| 13.2V | 40% |
| 13.1V | 20% |
| 12.8V | 10% |
| 12.0V | ~0% (approaching BMS cutoff) |
Note: LiFePO4's extremely flat voltage curve means the 13.4V–13.1V range covers most of the usable capacity — voltage alone is not reliable for SoC. Always use a coulomb counter (Victron SmartShunt) for accurate SoC.
24V LiFePO4 voltage settings
| Parameter | Setting |
|---|---|
| Absorption voltage | 28.4–29.2V (28.8V standard) |
| Float voltage | 27.0–27.2V |
| Equalization | DISABLE |
| Low voltage disconnect | 23.0V |
48V LiFePO4 voltage settings
| Parameter | Setting |
|---|---|
| Absorption voltage | 56.8–58.4V (57.6V standard) |
| Float voltage | 54.0–54.4V |
| Equalization | DISABLE |
| Low voltage disconnect | 46.0V |
Charger configuration by device
Victron SmartSolar MPPT
In VictronConnect app:
- Battery type: Lithium Iron Phosphate (LiFePO4)
- Or custom: Absorption 14.4V, Float 13.5V, Equalization: Off
Renogy Rover MPPT
Set via Renogy DC Home app or controller buttons:
- Select "LiFePO4" battery type (some models)
- Or manual: User mode → Absorption 14.4V, Float 13.6V
Victron Orion XS DC-DC charger
In VictronConnect:
- Battery type: LiFePO4 (sets absorption 14.2V, absorption time 2h, float 13.5V)
Victron MultiPlus inverter/charger
In VEConfigure software (via MK3-USB adapter):
- Battery type: LiFePO4
- Charge voltages pre-set; disable storage mode
Progressive Dynamics converter
PD9100 series: select LiFePO4 mode (dip switches or button on newer models). Sets absorption to 14.4V, disables equalization.