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Requires one of these BMS-es:
Why lithium-iron-phosphate?
Lithium-iron-phosphate (LiFePO4 or LFP) is the safest of the mainstream li-ion battery types. The nominal voltage of a 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.
Rugged
A lead-acid battery will fail prematurely due to sulfation:
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 (see below).
LFP is therefore the chemistry of choice for 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 leadacid 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 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, a LFP battery will still achieve 90% efficiency under shallow discharge conditions.
Size and 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.
Bluetooth
With Bluetooth cell voltages, temperature and alarm status can be monitored.
Very useful to localize a (potential) problem, such as cell imbalance
VOLTAGE AND CAPACITY
Nominal voltage |
12,8V |
Nominal capacity @ 25°C* |
160Ah |
Nominal capacity @ 0°C* |
130Ah |
Nominal capacity @ -20°C* | 80Ah |
Nominal energy @ 25°C* | 2048Wh |
CYCLE LIFE (capacity ≥ 80% of nominal)
80% DoD |
2500 cycles |
70% DoD |
3000 cycles |
50% DoD |
5000 cycles |
DISCHARGE
Maximum continuous discharge current |
320A |
Recommended continuous discharge current |
≤160A |
End of discharge voltage | 11,2V |
OPERATING CONDITIONS
Operating temperature |
Discharge: -20°C to +50°C Charge: +5°C to +50°C |
Storage temperature |
-45°C to +70°C |
Humidity (non-condensing) | Max. 95% |
Protection class | IP 22 |
CHARGE
Charge voltage |
Between 14V/28V and 14,4V/28,8V (14,2V/28,4V recommended) |
Float voltage |
13,5V/27V |
Maximum charge current | 320A |
Recommended charge current | ≤80A |
OTHER
Max storage time @ 25°C* |
1 year |
BMS connection |
Male + female cable with M8 circular connector, length 50cm |
Power connection (threaded inserts) | M8 |
Dimensions (hxwxd) Inches | 9.5 x 12.5 x 6 Inch |
Weight | 20kg |
*When fully charged