Understanding how long a 12V LiFePO4 battery can power your devices through an inverter depends on three key factors: battery capacity, inverter efficiency, and appliance power draw.

Key Variables to Calculate Runtime

1.Battery Capacity (Ah):

Example: A 100Ah LiFePO4 battery stores 1,200Wh (12V × 100Ah).

2.Inverter Efficiency:

Most inverters are 85-95% efficient. For safety, use 90% in calculations.

3.Load Power (Watts):

Check your appliance’s wattage (e.g., laptop = 60W, mini-fridge = 100W).

4.Runtime Formula

Hours = (Battery Capacity × Voltage × DoD × Inverter Efficiency) ÷ Load Power

DoD (Depth of Discharge): LiFePO4 batteries safely use 80-100% of capacity.

Example:

100Ah battery (12V, 90% DoD, 90% inverter efficiency)

5.Powering a 300W device:

Runtime = (100Ah × 12V × 0.9 × 0.9) ÷ 300W ≈ 3.24 hours

Real-World Scenarios

Laptop (60W): ~16 hours

Mini-Fridge (100W): ~9.7 hours

Blender (800W): ~1.2 hours

LED Lights (20W): ~48 hours

Tips to Extend Battery Life

✅ Reduce Load: Prioritize energy-efficient appliances.

✅ Use 24V Systems: For heavy loads (e.g., air conditioners), higher voltage reduces current strain.

✅ Add Solar: Pair with solar panels for daytime recharging.

✅ Monitor Usage: Track consumption with a battery monitor.

Why Choose LiFePO4?

Longer Lifespan: 2,000+ cycles vs. 500 cycles for lead-acid.

Safety: Stable chemistry resists overheating.

Compact & Lightweight: 50% lighter than traditional batteries.

A 100-200Ah LiFePO4 battery suits most small-to-medium power needs. Calculate your requirements, and enjoy reliable off-grid energy!