When you compare power stations and home batteries, you'll often see two battery types: LiFePO4 (lithium iron phosphate, also called LFP) and NMC (nickel manganese cobalt). The chemistry affects lifespan, safety and weight.
Lifespan
- LiFePO4: typically 3,000–6,000 charge cycles before capacity drops to 80%
- NMC: typically 500–1,500 cycles
If you use your battery often, such as daily solar storage, LiFePO4 can last many years longer.
Safety
LiFePO4 is chemically more stable and much less prone to overheating. This is one reason it has become the standard for home energy storage and most modern power stations.
Weight and size
NMC stores more energy per kilogram, which is why it's used in smartphones, laptops and many electric cars. For a backup battery that sits at home, the extra weight of LiFePO4 is rarely a problem.
Cost
LiFePO4 used to be more expensive, but prices have fallen sharply. Considering its longer lifespan, it usually offers a lower cost per cycle.
Summary
| LiFePO4 | NMC | |
|---|---|---|
| Cycle life | 3,000–6,000 | 500–1,500 |
| Thermal stability | Excellent | Good |
| Weight | Heavier | Lighter |
| Best for | Home backup, solar, frequent use | Compact, lightweight devices |
Cold weather tip
Neither chemistry should be charged below 0 °C unless the device has built-in battery heating. Store your battery in a frost-free place in winter.
FAQ
Which chemistry should I choose for home backup?
For most people, LiFePO4, thanks to its lifespan and safety.
How should I store a battery long-term?
Around 50–80% charge in a cool, dry place, topping up every few months.