Lithium-iron-phosphate (LiFePO4 or LFP) is the safest of the mainstream li-ion battery types. The nominal voltage cell is 3,2V (lead-acid: 2V/cell). A 12,8V Li-ion battery therefore consists of 4 cells connected in series; and a 25,6V battery consists of 8 cells connected in series.
• 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 Li-ion battery is 92%
• Weight reduction of the battery pack (with equal energy used) up to 70% referred to lead type.
• Lithium-ion batteries are more expensive when compared to leadacid. But in demanding applications, the high initial cost will be more than compensated by longer service life, superior reliability and excellent efficiency