12V 50ah Lithium Battery for Solar Power System

Model NO.: opt-1250 Nominal Voltage: 12V, 12.8V Shape: Square Battery Installation: Packaged Model: Opt-1250 Discharge Cut-off Voltage: 10V Charge Current (Standard. Continuous): 10A (0.2c) Charge Method: Cc/CV Cycle Life(1 C/1c 100% Dod): 2000 Cycles Specification: CE, UL, RoHS, SGS, TS/16949 and ISO9001-2008 HS Code: 8507600090 Usage: Solar Power System Discharge Rate: Low Discharge Rate Electrolyte: LiFePO4 Rechargeable: Chargeable Nominal Capacity: 50ah Charge Cut-off Voltage: 14.6V Weight(Approx,Including Case): 15kg Peak Discharge (Max.10 Sec Duration): 200A Trademark: optimum Origin: China Guangdong
12v 50ah Lithium Battery for solar power system
Why lithium-iron phosphate?

Lithium-iron-phosphate (LiFePO4 or IFR) is the safest of the mainstream li-ion battery types.
The nominal voltage of a IFR cell is 3,2V (lead-acid: 2V/cell). A 12,8V LiFePO4 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 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
Saves up to 70% in space
Saves up to 70% in weight

Expensive?
Lifepo4 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
IFR batteries are easier to charge than lead-acid batteries.
The charge voltage may vary from 14V to 16V (as long as no cell is subjected to more than 4,2V), 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)
 Its essential functions are:
1. Disconnect or shut down the load whenever the voltage of a battery cell falls 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.
 
 
 
Why OptimumNano Energy ?
 
1. Professioanl LiFePO4 Battery manufacturer.
2. 8 years practical experience
3. Main supplier of power battery in China.
4. Occupy 1/3 power battery market of EV,E-bus all over China.
 
 
 

Battery specification
VOLTAGE AND CAPACITY	IFR 12,8/20	IFR 12,8/30	IFR 12,8/50	IFR 12,8/100	IFR 12,8/150	IFR 12,8/200	IFR 12,8/160
Nominal voltage	12,8V	12,8V	12,8V	12,8V	12,8V	12,8V	12,8V
Nominal capacity @ 25°C*	20Ah	30Ah	50Ah	100Ah	150Ah	200Ah	260Ah
Nominal capacity @ 0°C*	18.7Ah	28Ah	46.7Ah	93.5Ah	140.2Ah	187Ah	243.1Ah
Nominal capacity @ -20°C*	14.76Ah	22.14Ah	36.9Ah	73.8Ah	110.7Ah	147.6Ah	118.08Ah
Nominal energy @ 25°C*	256Wh	384Wh	640Wh	1280Wh	1920Wh	2560Wh	3328Wh
*Discharge current ≤1C
CYCLE LIFE
100% DoD	2000 cycles
80% DoD	3000 cycles
60% DoD	5000 cycles
DISCHARGE
Recommended continuous discharge current	≤30A	≤60A	≤60A	≤100A	≤100A	≤100A	≤100A
Maximum 10 s pulse current	120A	120A	150A	150A	150A	150A	150A
End of discharge voltage	10V	10V	10V	10V	10V	10V	10V
OPERATING CONDITIONS
Operating temperature	-20°C to +60°C (do not charge when battery temperature < 0°C)
Storage temperature	"-20°C to +70°C"
Protection class	IP 56
CHARGE
Charge voltage	Between 14V and 15V (<14,6V recommended)
Float voltage	13,6V
Maximum charge current	20A	30A	50A	100A	150A	200A	260A
Recommended charge current	≤5A	≤6A	≤10A	≤20A	≤30A	≤40A	≤50A
Other
Max storage time @ 25 °C*	1 year
Dimensions (hxwxd) mm	182*76*167	118*175*175	190*165*175	330*170*220	520*262*242	520*262*242	520*262*242
Weight	2.8kg	4kg	7kg	16kg	23kg	30kg	37kg
*When fully charged

 

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Product Categories : LiFePO4 For Solar/Wind Energy System