Why lithium iron phosphate?

The lithium iron phosphate (LiFePO4 or LFP) battery is the safest of the regular lithium-iron battery types. The nominal voltage of an LFP cell is 3.2V (lead-acid: 2V/cell). A 12.8V LFP battery therefore consists of four cells connected in series, and a 25.6V battery consists of eight cells connected in series.

Robust

A lead-acid battery will fail prematurely due to sulfation in the following cases:

• If it is operated for a long time in an insufficiently charged state (i.e. if the battery is rarely or never fully charged).
• If it is left in a partially charged or, even worse, completely discharged state (yacht or motorhome during the winter).

An LFP battery doesn't need to be fully charged. Its service life is even slightly increased if the battery is partially charged rather than fully charged. This is a significant advantage of LFP batteries over lead-acid batteries.

Further advantages include a wide operating temperature range, excellent cycling, low internal resistance and high efficiency.

The LFP battery is therefore the best choice for demanding use.

Efficient

In many applications (especially off-grid solar and/or wind power plants), the energy efficiency can be of crucial importance.
The energy efficiency of a charging cycle (discharging from 100% to 0% and recharging to 100%) for an average lead-acid battery is approximately 80%. The energy efficiency of a charging cycle for an LFP battery, in contrast, is 92%. The charging process of a lead-acid battery becomes particularly inefficient when the 80% state of charge mark is reached. This leads to energy efficiency rates of only 50%. This value is even lower for solar systems, as they require energy reserves for several days (the battery is operating at a state of charge between 70% and 100%). An LFP battery, on the other hand, still achieves an energy efficiency of 90%, even when it is in a shallow state of discharge.

Size and weight

Space savings of up to 70%
Weight savings of up to 70%

Expensive?

LFP batteries are expensive compared to lead-acid batteries. However, in demanding applications, the higher initial cost is more than offset by their longer service life, high reliability, and excellent energy efficiency.

Bluetooth

Cell voltages, temperature and alarm status can be monitored via Bluetooth.
This is very useful to detect a (possible) problem such as a cell imbalance.