Lithium-iron-phosphate (LiFePO4 or LFP) is the safest of the mainstream li-ion battery types. The significant advantages of lithium iron phosphate batteries make it to be used widely in differenct filed.



Rugged
A lead-acid battery will fail prematurely due to sulfation:
If it operates in deficit mode during long periods of time (i.e. if the battery is rarely, or never at all, fully charged).
if it is left partially charged or worse, fully discharged (yacht or mobile home during wintertime).
A LFP battery does not need to be fully charged. Service life even slightly improves in case of partial charge instead of a full charge. This is a major advantage of LFP compared to lead-acid.
Other advantages are the wide operating temperature range, excellent cycling performance, low internal resistance and high efficiency
LFP is therefore the chemistry of choice for very demanding applications.

Efficient
In several applications (especially off-grid solar and/or wind), energy efficiency can be of crucial importance.
The round trip energy efficiency (discharge from 100% to 0% and back to 100% charged) of the average lead acid battery is 80%.
The round trip energy efficiency of a LFP battery is 92%.
The charge process of lead-acid batteries becomes particularly inefficient when the 80% state of charge has been reached, resulting in efficiency of 50% or even less in solar systems where several days of reserve energy is required (battery operating in 70% to 100% charged state).
In contrast, a LFP battery will still achieve 90% efficiency under shallow discharge conditions.

Size and weight
Saves up to 70% in space
Saves up to 70% in weight

Expensive?
LFP batteries are expensive when compared to lead-acid. But in demanding applications, the high initial cost will be more than compensated by longer service life, superior reliability and excellent efficiency.

Endless flexibility
LFP batteries are easier to charge than lead-acid batteries. The charge voltage may vary from 14 V to 15 V (as long as no cell is subjected to more than 4,2 V), and they do not need to be fully charged. Therefore several batteries can be connected in parallel and no damage will occur if some batteries are less charged than others.

Battery Management System (BMS)
The safety and reliability of lithium batteries is a big concern, thus all assemblies should have an integrated Battery Management System (BMS). The BMS is a system that monitors, evaluates, balances, and protects cells from operating outside the "Safe Operating Area". The BMS is an essential safety component of a lithium battery system, monitoring and protecting the cells within the battery against over current, under/over voltage, under/over temperature and more.
The BMS will:
1. Disconnect or shut down the load whenever the voltage of a battery cell decreases to less than 2,5V.
2. Stop the charging process whenever the voltage of a battery cell increases to more than 4,2V.
3. Shut down the system whenever the temperature of a cell exceeds 50°C.

Enviromental friendly
Lithium iron phosphate is a totaly green energy solution with no pollution gas or material to be wasted for our earth. Also it can be recycled easily. But the lead acid batteries leave many kinds of poisions which is harmful for health, environments and next generations.