Europe Poland Stock 3.2V 304Ah Lithium LiFePO4 Battery Cell with 9000 Cycles for Solar Energy Storage

Europe Poland Stock 304Ah 9000 Cycles 3.2V Lithium LiFePO4 Battery — Free Shipping. This high-capacity prismatic lithium iron phosphate (LiFePO4) cell is designed for demanding energy storage applications, offering exceptional cycle life and reliable performance.

CALB is a renowned research and manufacturing group specializing in battery technology. The company holds numerous intellectual property rights, making its battery products highly popular in the global market. Over the years, CALB has shipped products worldwide, contributing to green power usage and the reduction of CO₂ emissions.

CALB operates ten major scientific research innovation platforms, including the "National Enterprise Technology Center," "Postdoctoral Research Workstation," and "Henan Engineering Technology Research Center," among others.

• 100% coverage of core technology intellectual property rights.
• Patents applied for across China, the United States, Europe, and other countries and regions.
• Recipient of the China Excellent Patent Award.
• Certified under the Jiangsu Provincial Intellectual Property Management Standardization program.
• Recognized as a Henan Provincial Intellectual Property Application Demonstration Enterprise.

Twenty-two scientific research projects have passed the scientific and technological achievements appraisal of Henan Province or the Aviation Industry Corporation of China. Of these, 10 have been identified as reaching the international advanced level, and 1 has been identified as reaching the international leading level.

Tested at 0.5C charge to 3.65V and 0.5C discharge to 2.5V as a single cycle. After 9000 cycles, 80% capacity remains. Real capacity: 300–304Ah.

The 280Ah LiFePO4 lithium battery is a favorite among DIY users for solar energy storage and off-grid backup. It is also suitable for:

• Caravans and campers
• Golf carts
• Forklifts
• Electric bikes and motorbikes
• RV and home energy storage systems
• Powerwalls and more

Screw-connected design allows the prismatic battery cell to be easily mounted and connected with busbars or screws. DIY-friendly for easy handling.

• Safety: Safest lithium battery, built-in PCM/PCB, no fire or explosion risk.
• Clean and green energy, no toxic materials contained.
• Long life cycle: 80% capacity remains after 500 deep cycles.
• No memory effect: highly efficient charging anytime, no capacity reduction.
• Operation temperature: -20~55°C.
• Good performance at high temperature with high temperature resistance.
• Low self-discharge rate: <3% monthly.
• Deep cycle: more than 2000 times life span, longer life than lead-acid batteries.

Exercise caution when working with all electrical equipment. Wear safety glasses and gloves when appropriate. Sparks and flashes can damage your eyes.

• Ensure cells are within operating temperature range prior to use.
• Do not use if cells are punctured, damaged, or leaking.
• Provide adequate protection to cells during assembly and use thereafter.
• Dispose of properly at a recycling or similar facility.
• Do not submerge in water.
• Do not allow contact with direct heat, extreme temperatures, or fire.
• Prevent harsh impacts or extreme vibrations which can cause immediate or cumulative damage.

Foams and UN carton packaging for safe transportation.

• Do not submerge the battery in water.
• Do not insert batteries with the (+) and (-) reversed.
• Do not disassemble, dispose in fire, heat, or short circuit.
• Do not expose batteries to sunlight for long periods.
• Do not keep batteries close to children.
• Do not short circuit the battery in any situation.
• Do not discharge the new battery! Please fully charge them at first.
• Do not open the battery safety valve.
• Do not violently wrest the screw on the terminal.
• Do not mix different brands of battery in one pack.
• Do not mix different capacity or different condition batteries together.

Please check all battery voltages and inner resistance, and make sure they are balanced before DIY. All batteries will be tested before shipment, but you need to test them too. You must have basic knowledge of electronics and battery assembly. If you know nothing, please learn more before doing assembly. No refund or warranty for any unprofessional operation. Some cells may have small scratches due to moving or long transportation, but this will not affect usage at all. We hope you don't mind.

By sea + Express (DDP, tax-free).
ETD: 5–8 days
ETA: 25–35 days after sailing (this is the delivery time for most orders; please wait patiently or contact us online).
Tracking will be updated after pickup by local express. Usually it takes around 15–25 days after sailing.

By railway + Express (DDP, tax-free). Except Switzerland and Romania.
ETD: 5–8 days
ETA: 30–45 working days after shipping (this is the delivery time for most orders; please wait patiently or contact us online).
Tracking will be updated after pickup by local express. Usually it takes around 25–40 working days after shipping.

Other: Some remote areas are not listed. Please provide your shipping address and zip code so we can check.

Note: Please choose your preferred method. We can ship to other countries too — contact us freely. We tell the truth. Honesty comes first. Please be aware of cheap but fast methods which are unreliable.

Whether you buy grade A, B, or C cells, or used LiFePO4 cells, and whether they are at the same voltage or not, you still need to perform an initial balance.

This means bringing them to the same state of charge. Using voltage alone to determine if they are at the same state of charge is unreliable for this chemistry. This is because the charge and discharge curve is relatively flat. That means cells could show the same voltage on your meter but be slightly off in state of charge.

It is important to have a solid initial balance so that when you do your first capacity test, you have accurate results. If one of your cells is too high or too low, it triggers your BMS high or low voltage disconnect, and your capacity results will be off. You'll think you're getting ripped off.

Also, if you have balancing problems with a used or new pack, and you rely on an active balancer to compensate, you need to do the initial balance and see if that fixes your problem.

People see one of their cells spiking and say, "Oh, that seems to be balancing wrong there." That's not how you solve the problem. You should do the initial balance, then the capacity test, and watch the cells under a large load to check for internal cell resistance. If you do have a bad cell, you should probably swap it out for a new one.

Also keep in mind that if you connect the cells in parallel and let them naturally balance over time, they will balance. But it takes weeks or months depending on the size of your battery bank.

The very initial voltage difference between them is very small. When they are at a high state of charge, current will pass between them to balance very quickly.

People check the balancing of their cells and say, "Oh, it's only off by 0.51 volt." These are new cells and they come at the same voltage. I suggest you connect them to a BMS; it could be OK. It is technically true that you can let the BMS monitor the balance on its own.

But if you have a very large battery bank, or if you have very different internal cell resistances, or if you have large loads, or if you want to balance the capacity, you should do a manual top balance, no matter what.