




OEM LiFePo4 12v 400ah 410ah Power lithium ion battery
$1,250.00 Original price was: $1,250.00.$880.00Current price is: $880.00.
Introducing our OEM brand 12V EG4 LiFePo4 server rack battery, specifically designed for solar off-grid systems. This 12.8V 400Ah lithium battery boasts a built-in 200A/250A internal BMS and 200Ah prismatic cells for 12 volt systems. Compared to industry standards, our battery pack utilizes only 4 prismatic 3.2V cells in series, resulting in a more compact design.
Our grade A cells are UL Listed and designed to last for over 7000 cycles at 80% depth of discharge, providing over 15 years of daily deep discharge use. This Power Queen-style server rack battery also allows for Bluetooth communication with your mobile phone, making setup and battery health monitoring a breeze.
With an operating efficiency of 99%, our LiFePo4 battery offers 20% more solar panel equivalence compared to AGM batteries with 80% efficiency. The BMS, equivalent to the EG4 style, is designed to last for 15 years, and we offer replacement/spare BMS units in case of any issues.

iNTRODUCTIONS
We're excited to offer our OEM EG4 lithium battery, which operates at 12.8V (12V) and provides 400AH/5.12kWh of power with a 200A internal BMS. This battery is composed of eight UL-listed prismatic 3.2V cells tested at 7,000 deep discharge cycles to 80% DoD, allowing you to charge and discharge it daily for over 15 years without any issues. Our battery is reliable and rigorously tested, with a 99% operating efficiency.
With each battery, you'll receive a 1-foot RS485 Communication Cable and a set of Parallel Cables, and if you order six or more batteries, you'll also receive an RS485 USB Battery Comm Cable (shipped separately).
Our OEM EG4 lithium battery boasts tier-one A+ cell composition, max energy density, flexible racking options, and is environmentally friendly and lead-free. You can stress-free expand your battery bank capacity, and the battery is longer-lasting, with a 10-20 year design life. The built-in BMS manages voltage, current, temperature, and health, ensuring reliable operation for years to come.
 Features:
- Bluetooth BMS communication built in
- Max Energy Density lifepower4
- Flexible Racking max support 16pcs.
- Options 99% Efficiency
- LiFePo4 16-Cell Pack
- Environmentally Friendly & Lead Free Stress-Free
- Battery Bank Expansion Capacity Longer Lasting;
- 10-20 year Design Life Reliable Built-In BMS,
- Voltage, Current, Temp. and Health Management
- Server rack lifepo4 12v design
- Design for solar off grid 12 volt system
- 12.8 volt server rack battery design
Battery apperance


Our wholesale OEM 12V 400AH server rack Lithium-Ion Battery System is built using rhombus cells with Lithium Phosphate technology (LiFePO4 or LFP/LiFePower4), ensuring a high level of safety. This system is designed to replace lead-acid batteries, providing a quadruple energy density for an equivalent weight and size. Thanks to LiFePower4 technology, the CMX 12V 400AH Lithium Battery System can be installed in a standard 19" server rack cabinet.
The electrical parameters of the CMX solar 12 volt 400AH/410AH Lithium Battery System are fully compatible with those of an AGM lead battery of 12V. In most cases, you can keep the same charging system without requiring any additional accessories for the replacement.
Our CMX 400 amp hour server rack LiFePO4 24V batteries are light, compact, and efficient, suitable for all types of applications. They are designed to be a drop-in replacement for old-generation batteries (Lead VRLA, AGM or OPZ batteries) in 12V systems that are low performance and harmful to the environment (due to the use of heavy metals and acid electrolytes).

Design for server rack
This 12.8-volt-eg4 12v 400ah battery is designed to be rack-mounted and can fit into a standard 19" server rack cabinet with front panels featuring two handles for easy carrying and installation. The battery utilizes 4-terminal M8 screw type connections, whether connected to a charger, inverter, or in parallel. This battery module includes optional built-in Bluetooth, which allows for all 12-volt server rack battery information to be displayed on a mobile phone app. Users can easily check the battery's working state, including voltage, discharge current, cell balance, SOC, and more. Additionally, users can communicate with computer software via RS485 or CANbus or directly with their inverter.
In addition to being available in server rack style, the EG4-style lithium battery | 12V 400Ah is also available as a power wall Lifepo4 12V 410Ah.
Specifications
| Items | Parameter |
|---|---|
| Battery Type | 12V 400AH Lithium Battery (LiFePO4) Server rack battery |
| Nominal Voltage | 12.8V |
| Nominal Capacity | 400Ah 410Ah |
| Energy | 5120 WH |
| Dimensions (L x W x H) | 520*380*290MM |
| Weight | 48KG |
| Case Material | ABS/Iron case lifepower4 |
| Certifications | CE/ISO/UN38.3/MSDS |
| Efficiency | 99% |
| Self Discharge | <1% per Month |
| Series & Parallel Application | 4 series or 4 parallel connected application 4s/1p 4S2P |
| Peak Discharge Current | 200 A |
| Continus Discharge Current | 200 A |
| Operation Temperature Range | -20~60℃ |
| Voltage at end of Discharge | 11 V |
| Working Voltage | 11-14.6V |
| Discharge Temperature | -4 to 140 ºF (-20 to 60 ºC) |
| Charge Temperature | 32 to 113 ºF (0 to 45 ºC) |
| Storage Temperature | 23 to 95 ºF (-5 to 35 ºC) |
| Cycle Life | > 8000 cycles |
| Self-Discharge Rate | Residual capacity: ≤3%/month; ≤15%/years |
| Reversible capacity: ≤1.5%/month; ≤8%/years | |
| Storage Temperature & Humidity Range | Less than 1 month: -20℃~35℃, 45%RH~75%RH |
| Less than 3 months: -10℃~35℃, 45%RH~75%RH | |
| Recommended storage environment: 15℃~35℃,45%RH~75%RH |

The BMS have all functions
- Overcharge detection function
- Over discharge detection function
- High and low Temperature protection
- Short detection and protection function
- Over current detection function
- Bluetooth communication
- Active Cell Balancing Function
- Internal capacitor built in
Test Curve




COREMAX provide custom server rack lifepo4 24v battery OEM service for different brand. Please feel free to contact us. We hope to help more brands like gyll eg4ll to build high quality brand.
When it comes to ensuring reliable backup power for your solar energy system, investing in high-quality server rack batteries is crucial. Popular options are the EG4 and Power Queen style server rack batteries, which are known for their durability and performance.
Coremax OEM EG4 batteries are 12V batteries that use advanced lithium iron phosphate (LFP) technology. They offer a long cycle life, high energy density, and fast charging capabilities. With a capacity of 400Ah, these batteries provide a reliable backup power source that can sustain your server rack energy storage during outages. Coremax OEM Power Queen batteries, come in 410Ah and 400Ah variants. They too are 12V -12.8v batteries, but they use lithium ion chemistry in their construction. They offer a deep cycle capacity, high discharge rate, and can handle multiple discharge and recharge cycles.

How OEM EG4 and Power Queen style Batteries Ensure Reliable Backup Power for Your Server Rack
eg4 12v 400ah Server rack battery are vital for the smooth operation of businesses and organizations of all sizes. These racks contain critical equipment like servers, switches, and routers, which require uninterrupted power to ensure proper functioning. Power outages can cause significant disruptions, resulting in downtime, data losses, and financial losses. That's where backup power solutions, such as the EG4 and Power Queen batteries, come in.
Coremax OEM 12v EG4 and Power Queen batteries are powerful, reliable, and durable backup power solutions that can ensure uninterrupted operation of your server rack. These batteries are specifically designed to handle high loads, ensuring that your server rack remains operational during power outages.
Coremax OEM 12 volt EG4 batteries utilize advanced lithium iron phosphate technology, which provides a long cycle life, high energy density, and fast charging capabilities. They can provide backup power for extended periods, making them ideal for critical applications that require continuous power. Additionally, they boast high durability, low maintenance, and exceptional safety features.
Shipping
Normally we ship the batteries by sea. For sample order, we can ship it by air as well. Coremax use thick foam to pack the batteries. And put it in a strong wooden case. max protection from damage during shipping. All goods packing accroding to UN38.3 regulartion for international shipment. Once the shipment arrived.Â

FAQ
Thanks for interested to Coremax Server rack LiFePo4 12v battery. Welcome to contact the Online Services. If it’s not our working time, please click “Send Inquiry” above or “Leave a Comment” below, We will offer you the best quote in 24 hours after we get the product specifications such as voltage capacity application etc.
We advice to get samples and evaluate in advance before bulk order. We will make the bulk order exactly the same as you request.
It depends on your order quantity.Normally 1-2days if we have sample in stock, 5-7days for newly produced samples.10-20 day for big order.
By Express (3-7 working days), suitable for urgent time or small quantity. By Sea (15-30 days), it suitable for mass production. By Air (4-7 days), from airport to airport.
Send Inquiry
| Weight | 50 kg |
|---|---|
| Dimensions | 70 × 50 × 30 cm |
| Capacity |
200Ah |
| Voltage |
24v |


Professinal Package
Lithium batteries are DG goods. The shipping must according to MSDS and UN38.3 regulations. Coremax lithium batteries have passed all required rules. All batteries packed with foams in a brown carton box. Then fit into wood case or wooden pallet. The packing materials provide strong protections to inside batteries. Make sure customer receive batteries in a best condition.
How to ship lithium battery packs.
- 1. For small lithium batteries cells and small battery packs, we can ship by air or express.
- 2. For heavy shipment and higher wh/ batteries, we will shipping by freight. For large order, we ship by containers.
- 3. Coremax provides standard shipping to most area like USA and Europe. Shipping service include DDU. DDP. Please confirm with our sales team for the latest shipping rate.
Lithium ion batteries are different from normal shipment. It requires special shipping forwarder to take care of them. You are welcome to use your shipping agent. Before that, please confirm with your agent as these are DG shipment. We provide shipping service to most area and different country. As battery weight and detail address will cause a different shipping rate. Please contact us for the exactly shipping cost on your order.
About COREMAX
Through cooperation with famous university on constant research and development in new technologies on BMS and Lithium batteries, we are heading toward leader status in the BESS industry due to its high-end technology. With rich experience and knowledge, we offer competitive and reliable LiFePo4 battery systems to promote the brand image, which in-turn has a profound influence on the whole industry. Innovations in research and development provide the best returns for our customers while at the same time providing the inspiration for our further development. Through great management, talented and forward-thinking engineers, high-quality products and first-class customer service, we aims to provide the best vapor experience. To our delight, we have earned a reputation all around the world. We believe that based on honest business practices and stable development, we can be all you want. Our goal is that everyone has a great experience with us, in accordance with our slogan of all for your health. Operation Philosophy: Quality and customer service are the decisive factors in any enterprise future. With that in mind, we implement the policy: Customer first, Quality first. Our forward thinking strategy has made us a consistent source of innovation across the industry in E-cigarettes and our production flexibility has allowed us to keep pace with the changing demands.
Shipping
With strict operating delivery systems in place, customers in the UK, Western Europe, and the US can be delivery door to door service. There is no more additional works on custom clearance for small quantity order.
Customer Service:
As the LiFePo4 lithium battery storage system industry is expanding rapidly in such a short amount of time, there is a high demand for certain products that take weeks and even months to arrive at the retailer. We are looking for distributors from different country like USA, Australia, Germany, England, Lebanon and South Africa..






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