







Coremax 20kwh CATL LiFePo4 solar energy storage Lithium ion battery powerwall
$5,800.00 Original price was: $5,800.00.$4,900.00Current price is: $4,900.00.
This is a combination 2pcs CMX48200W for residential energy storage system. Total 51.2v 400Ah. Rated energy 20 kwh. This small 20kwh is suitable for a normal home use. Can work with many different brand inverters. Please check with our sales team to confirm if your inverter compatible with this battery. The battery built in CATL LiFePo4 lithium ion battery. Prismatic type. and built in ESS BMS. Super long life cycles 10+ year warranty.
Coremax 48200W is an intelligent 20kWh (20.48kWh usable) solar battery backup system for home appliances. Combined with your solar system, you can reduce the consumption of electricity from the public grid by up to 90%, enabling so-called “local production, local consumption”. You achieve optimum solar power storage utilization at all times. Since the home solar battery backup system is operated in parallel with the grid, you only draw the amount of electricity from the grid that may be required in addition to the storage electricity. This saves you money – in view of the electricity prices – and makes a valuable contribution to reducing the environmental pollution.
Basic Description
Coremax CMX48200W is a scalable powerwall design add up to 16 batteries with a total 160 KwH Power. This baterry offer 10KwH, 20KwH, 30KwH, 40KwH, 50KwH, 60KwH, 70KwH, 80KwH, 90KwH, 100 KwH, 110 KwH, 120 KwH, 130 KwH, 140 KwH, 150 KwH, 160 KwH Power storage system.
With modular structure, which can be flexibly composed of a variety of voltage platform, a variety of capacity level system, and easy maintenance.
The design of battery management system provides the highest reliability.
Using Lithium iron phosphate battery, which has high safety performance, long cycle life, with service life of more than 20 years.
Small size, light weight, easy to carry,which can be quickly applied to various scenarios.


Detail Specifications
| Item | Unit | Module Specification | Remark | |
|---|---|---|---|---|
| Nominal Capacity | Ah | 100Ah @ 0.5C | ||
| Actual Capacity | Ah | ≥105Ah @ 0.5C | ||
| Configuration | - | 16S1P | ||
| Operating Temp. | Min. | ℃ | 0 (Charge).-20 (Discharge) | @ Temp Sensor |
| Max. | ℃ | 55 | ||
| Storage Temp. | Min. | ℃ | -20 | |
| Max. | ℃ | 55 | ||
| Nominal Voltage | V | 51.2 | Cell 3.2V | |
| Max. Voltage | V | 58.4 | Cell 3.65V | |
| Min. Voltage | V | 40 | Cell 2.5V | |
| Nominal Energy Content | kWh | ≥ 5kwh @ 0.5C | ||
| Weight | Kg | ≤48 | ||
| Resistance Consistency (10s, 25℃, 30%SOC, BOL) | - | -15%/+10% DC-IR | ||
| Discharge Operation max current (10s, 25℃, SOC50%, BOL) | A | 100Amps | 120 Per 1 module | |
| Charge Operation max current (10s, 25℃, SOC 50% BOL) | A | 100 A | 90Per 1 module | |
| Continuous Discharge Operation current (25℃, SOC50%, BOL) | A | 50A | 105 Per 1 module | |
| Continuous Charge Operation current (25℃, SOC 50% BOL) | A | 50 A | 52.5 Per 1 module | |
| Standard Charge (@ 25℃ ) | - | Constant Current: ≤0.5C Constant Voltage:3.65V End Condition(Cut off): ≥0.02C | ||
| The state of charge(SOC) of the module | - | SOC 30%±3% | before shipping | |
| Self Discharge Rate(SOC 100%, 25℃ , Loss/Month, @BOL) | % | Max 3 | ||
| Safety and Reliability | - | Compliance with QC/T 743 test standard | GBT Certificate @cell | |
| Insulation | MΩ | Min 20MΩ/1000VDC, 25℃±5℃, RH50% | ||
| Cooling type | - | Natural(Passive) Convection | (Air Cooling) | |
Advantages of CMX Powerwall
1. Advanced lithium iron phosphate technology, first class battery control system made by Contemporary Amperex Technology, the world's biggest maker of electric-vehicle batteries who specializes in the manufacturing of lithium-ion batteries for electric vehicles and energy storage systems, as well as battery management systems (BMS).
2. Modular structure which can form varieties of energy levels, small size, convenient to maintain
3. Modular design, fast transportation and installation, easy to use
4. 12 years warranty, one stop service
5. Top level electric and structure design, silence enjoyment
6. Remote control system for APP, visual data
7. Wall-mounted, convenient and easy installation
This Coremax 20 KWH Power Reserve Power Wall battery storage system has a 20 kWh useable capacity. This is a complete system that comes ready for connection, durable battery, intelligent energy manager and display screen. CMX uses lithium-iron phosphate (LiFePO4) battery technology, one of the most reliable, safest and longest-lasting storage technologies currently available. LiFePO4 is a popular technology for stationary storage systems due to its uniquely high chemical stability and resulting high reliability, durability and long lifespan.
Computer Monitor Software
Computer monitor software for Battery bank BMS is available for this 10 kwh power wall bank. The monitor software communicate with windows computer or Mac OS. by RS485-USB. This software will allows you monitor all states of the battery working conditions. Like Discharge current, voltage, charging current, Temp of the cells and BMS. SOC of the battery system and SOH of the pack. In additional, the BMS software will possible to read all history records which is recorded by BMS while it was working. So, if anything happens, we can easy to check information, alarm from the Software.



A grade Brand New cells only
Coremax Use only A grade Brand new cells for this 16S2P Lithium ion battery Powerwall storage bank. Brand Like CATL or Guoxuan prismatic cells. Sometimes we can use BYD or EVE depends on customer require and availability of the cells.

20kwh lifepo4 48v 400ah home battery Residential ESS
This lifepo4 battery for solar storage is an ideal addition to solar panel systems. It is a tesla power wall alternative designed for off-grid /on grid case where house owners need or want to become independent of their utility. This 48 volt 400ah 20kwh lithium ion battery power wall ESS allows you to maintain a sustained power supply during the day or night.
Why Powerwall?
- This is the best tesla power wall alternative from China. Like all kinds of new energy power are acceptable, and making full use of clean energy. The output power of solar energy and wind energy can be effectively smoothed. The impact to the power grid and users, which is consulted by intermittency of new energy, can be effectively overcome.
- Providing uninterrupted power to users. With this lifepo4 battery for solar storage powerwall bank, it satisfies the requirement of users under the extreme environment, such like the power failure caused by earthquake and flood.
- Saving electricity for users by peak-shift. Under the price of peak valley, if the power consumption is big in the rash hour, this system can help to save expenditure by storing electricity during the electricity troughs, and using in the peak time.
PV Solar Priority Mode
In this mode, the power supply to the load is fed by the solar panel input. The amount of electricity generated by the solar cell is stored in the battery in addition to the user load. When the amount of electricity generated by solar does not meet the user load, the amount of electricity stored in the battery is replenished to the load.
AC Priority Mode
In this mode, the power supply of the load is provided by the mains input. Solar power only charges the battery; When the battery power is seriously insufficient, the AC mains will start to charge the battery.When the AC mains is powered off or abnormal, the system will switch to the battery to supply power to the load.

Power Rating: 20 kWh Cell Type; CATL prismatic Cell LiFePo4
Inverter Not Included: Compatible all inverters (Please see the list below)
Installation Type: DC-Coupled
Phase: Single Phase
Certification: UL1973 - pending, UL9540A - pending, IEC62619,CE-EMC, UN38.3, MSDS,Test Report from National Center For Quality Supervision and Inspection of Battery Products approved
Utilizes Coremax Power Reserve Power Wall Battery Storage mobile app to monitor and control your system


Battery Shipping
Lithium ion batteries are DG shipment. Coremax batteries are certifid by MSDS, UN 38.3. We can ship batteries by sea or by air depending on customer request.
All batteries is packed in well protected foam and strong carton box. In additional. We has wooden case available for sea shipping.
Warranty
1:What's your warranty years?
We offer standard factory warranty which is valid 10 years for battery product, from the date of installation or no more than 10 and a half years from the delivery date from factory. The battery capacity will be no less than 70% within 10 years or 10MWh battery through put per kWh of the initial installation date by conditions charge rate is no more than 0.5C, and environment temperature should be in the range of 0℃ to 30℃.
2:If battery has issues, how you proceed for warranty?
Our engineer will remotely check the issues by software, this need local installer assistance. If it is software issue, the battery can be repaired by firmware update. If it is battery hardware issue, we will send the battery module or BMS to customer as the replacement.
Service
1:Can you offer OEM or ODM?
Yes, we are LFP battery specialized solution provider mianly in energy storage field. You can please inform us your applications, inverter brand and model name. We will select or customize LFP battery system for you.
FAQ: Battery Cell
1:What battery cell you are using?
We are using CATL or BYD brand new prismatic cell. If necessary, please contact us for battery cell specifications.
2:How many cycles can achieve for your battery cells?
CATL and BYD brand new cells can achieve 6000 cycles @ 25℃, 0.5C conditions. Also please know usually 1C condition is about 3500 cycles.

APPLICATIONS
- Battery backup – A simple, robust option for using clean energy to keep a building powered during power outage. lithium ion powerwall 200 amp hour 48 volt suitable for single use or in parallal.
- Self-supply – Obtain energy from Solar panels or AC grid, and work independence by storing excess solar energy for later use
- Time-of-Use – Store off-peak grid power for use when utilities charge the highest rates.
- Demand charge curtailment – Reduce the demand charge for businesses
- Off-grid – Use renewable 48v 200ah lifepo4 battery for solar storage energy to power your home during the day light, and stored excess energy for the night.
Customer Installation
“CMX 48v 100ah lifepo4 battery for solar storage eliminated the most difficult challenges we face when building microgrids in remote tropical locations. The batteries are much easier to transport and they have a good chance of lasting the entire 20 years. This means CMX batteries generally pay for themselves in under 4 years!”
The tesla powerwall alternative from CMX is one of the best source I got from China. This powerwall with 5 kwh energy. When I use 2pcs for the small system works perfectly with my growatt 5000w inverter. Our customer love this Coremax powerwall so much and most important it can really last.
This is a perfect lithium 48v 100ah battery powerwall I have ever got from China. CMX use laser welding for these prismatic lfp cells and the BMS can communicate with my sol art 8000w and 12000w inverter. it shows all information. thanks guys. a cheaper alternative to tesla powerwall.
| Weight | 200 kg |
|---|---|
| Dimensions | 90 × 60 × 30 cm |
| Cell Brand |
3 reviews for Coremax 20kwh CATL LiFePo4 solar energy storage Lithium ion battery powerwall


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..





Philip Robinson –
Solar panels of just the right size for my purpose. I received very good service from Emily throughout the ordering process and also afterwards
sergio monfort –
I am very satisfied with this purchase. The seller sent the parcel quite quickly, even more faster than i thought.. There were some little problems with the proper configuration of the device at first, but everything was done correctly with seller’s and their engineer’s professional skills. Thank you
Ryan Miller –
The Coremax 20kWh Solar Energy Storage Lithium-Ion Battery Powerwall with CATL LiFePO4 Cells is a game-changer in the realm of home energy storage solutions. With its impressive capacity and top-of-the-line CATL LiFePO4 cells, this powerwall delivers outstanding performance, reliability, and versatility.
The standout feature of this battery powerwall is its massive 20kWh storage capacity, providing ample energy to power a home with ease. It seamlessly stores excess solar energy generated during the day, allowing you to tap into it during the evenings or during power outages. This not only maximizes energy utilization but also reduces reliance on the grid and lowers electricity costs in the long run.
The integration of CATL LiFePO4 cells ensures exceptional quality and performance. These cells are known for their long lifespan, high energy density, and superior safety features. With CATL’s renowned reputation in the battery industry, you can have complete confidence in the reliability and durability of the Coremax powerwall.
Installation and setup of the Coremax 20kWh Powerwall are straightforward, thanks to its user-friendly design. It is compatible with various solar energy systems and can be easily connected to your home’s electrical system. The powerwall’s sleek and compact design allows for flexible installation, whether it be wall-mounted or floor-standing, while taking up minimal space.
One of the standout advantages of this powerwall is its advanced battery management system (BMS). The BMS optimizes the charging and discharging processes, ensuring efficient energy transfer and prolonging the overall lifespan of the battery. Additionally, the powerwall is equipped with comprehensive safety features, including overcharge, over-discharge, and overheat protection, providing peace of mind and a worry-free experience.
The Coremax 20kWh Powerwall is designed to be compatible with smart home integration systems, enabling you to monitor and control your energy consumption easily. It allows you to track your energy usage, set preferences, and even schedule charging and discharging times. This level of control empowers you to make the most of your stored energy and optimize your energy management.