Guangdong, China
Business Type:
Manufacturer/Factory & Trading Company
Year of Establishment:
Management System Certification:
ISO14001:2004, OHSAS18001:2007
Main Markets:
North America, Europe, Australia
International Commercial Terms(Incoterms):
OEM/ODM Service
Sample Available
MEI Awards
Spanish Speaker

12V 50ah Lithium Battery, 12V Lithium Battery, 12V 50ah Li-ion Battery manufacturer / supplier in China, offering 12V 50ah Lithium Battery for Solar Power System, 40FT Long Range Battery Dricve Electric Bus From Opitmumnano China, Deep Cycle 9.6V 10ah Lithium Battery for LED Light and so on.

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  • 12V 50ah Lithium Battery for Solar Power System
  • 12V 50ah Lithium Battery for Solar Power System
  • 12V 50ah Lithium Battery for Solar Power System
  • 12V 50ah Lithium Battery for Solar Power System
  • 12V 50ah Lithium Battery for Solar Power System
  • 12V 50ah Lithium Battery for Solar Power System

12V 50ah Lithium Battery for Solar Power System

Get Latest Price
Purchase Qty. / Reference FOB Price
1-999 Pieces US $1,000
1,000+ Pieces US $1
Production Capacity: 1000packs/Week
Transport Package: Customised Package, Lead Acid Plastic Case
Payment Terms: T/T
Usage: Solar Power System
Nominal Voltage: 12V, 12.8V
Discharge Rate: Low Discharge Rate
Shape: Square Battery
Electrolyte: LiFePO4
Installation: Packaged

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Basic Info

Model NO.: opt-1250
Rechargeable: Chargeable
Model: Opt-1250
Nominal Capacity: 50ah
Discharge Cut-off Voltage: 10V
Charge Cut-off Voltage: 14.6V
Charge Current (Standard. Continuous): 10A (0.2c)
Weight(Approx,Including Case): 15kg
Charge Method: Cc/CV
Peak Discharge (Max.10 Sec Duration): 200A
Cycle Life(1 C/1c 100% Dod): 2000 Cycles
Trademark: optimum
Specification: CE, UL, RoHS, SGS, TS/16949 and ISO9001-2008
Origin: China Guangdong
HS Code: 8507600090

Product Description

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.

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

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
Nominal voltage12,8V 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*256Wh384Wh 640Wh 1280Wh 1920Wh2560Wh 3328Wh
*Discharge current ≤1C
100% DoD 2000 cycles
80% DoD3000 cycles
60% DoD 5000 cycles
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 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 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 

Max storage time @ 25 °C* 1 year
Dimensions (hxwxd) mm 182*76*167118*175*175190*165*175330*170*220520*262*242 520*262*242520*262*242
Weight 2.8kg4kg 7kg 16kg 23kg 30kg 37kg 
*When fully charged


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