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The Victron Energy LiFePO4 Battery 12,8V/100Ah Smart is extraordinarily high-performance. It needs to be used in conjunction with the Victron BMS control system. Lithium-iron-phosphate (LiFePO4 battery or LFP) is the safest of the mainstream li-ion battery types. Check the full specifications of Victron Energy LiFePO4 Battery 12,8V/100Ah Smart below.
VOLTAGE AND CAPACITY
CYCLE LIFE (capacity ≥ 80% of nominal)
Lithium-iron-phosphate (LiFePO4 or LFP) is the safest of the mainstream li-ion battery types. The nominal voltage of an LFP cell is 3,2V (lead-acid: 2V/cell). A 12,8V LFP battery, therefore, consists of 4 cells connected in series, and a 25,6V battery consists of 8 cells connected in series.
Lead-acid batteries will fail prematurely due to sulfation:
• If it operates in deficit mode during long periods (i.e. if the battery is rarely or never fully charged).
• If it is left partially charged or fully discharged (yacht or mobile home during wintertime).
LFP batteries do not need to be fully charged. Service life even slightly improves in case of a partial charge instead of a full charge. This is a significant advantage of LFP compared to lead acid. Other advantages are the wide operating temperature range, excellent cycling performance, low internal resistance and high efficiency (see below). LFP is, therefore, the chemistry of choice for very demanding applications.
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 an 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 efficiencies 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, an 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
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.
With Bluetooth cell voltages, temperature and alarm status can be monitored. Very useful to localize a (potential) problem, such as cell imbalance.
Read the Datasheet for the Victron Energy LiFePO4 Battery 12,8V/100Ah Smart (PDF)