High Quality Solar Backup System for Home From Huawen

Excellent performance, customized for construction sites

The lithium titanate battery power system, with the unique rate characteristics and excellent low-temperature performance of lithium titanate materials, perfectly solves the problem of high-rate power demand that traditional batteries are difficult to cope with in the complex environment of construction sites. The system is designed for heavy-duty electrical equipment on construction sites, and can provide strong support for both the instantaneous high power demand when the equipment is started and the stable power supply during continuous operation. Its unique voltage stabilization and frequency modulation functions effectively reduce the impact of power fluctuations on equipment performance, ensure the smooth and safe operation of the equipment, and greatly improve work efficiency and service life.

Technological innovation leads the industry trend

The core advantage of the lithium titanate battery power system lies in the high-performance lithium titanate material it uses. Compared with traditional battery materials, lithium titanate has higher safety, longer cycle life and a wider temperature adaptability range, which means that even in extreme environments such as extreme cold or high temperature, the system can still work stably and provide uninterrupted power guarantee for construction site operations. Its excellent rate performance enables the system to respond quickly and meet the high power demand of the equipment in a short period of time, bringing unprecedented convenience and efficiency to construction sites.

Smooth delivery, opening the future chapter

At present, after strict quality inspection and performance testing, the 789.6V 28Ah lithium titanate battery power system has been successfully delivered and officially entered the on-site commissioning stage, ensuring that the system is highly matched with the construction site operating environment and performs optimally. The successful launch of the lithium titanate battery power system is not only a reflection of the innovation in the application of Lishen super-electric technology, but also an important contribution to global construction site energy solutions.

With the excellent performance and reliable quality of its products, Lishen Battery brings safer, more efficient and greener energy support to construction site operations, helping to open a new chapter in the use of construction site energy.

The battery management system is commonly known as the battery nanny or battery butler, and BMS is the abbreviation of Battery Management System. That is to say, the battery management system is to manage the battery so that the battery can achieve a better working state and work stably.

The battery management system is an intelligent circuit board, which is mainly used to intelligently manage, monitor, and maintain the various states of the battery to prevent overcharging, overdischarging, and short circuits in the circuit, and thereby extend the service life of the battery.

The BMS (battery management system) mainly includes a control module, a display module, a wireless communication module, a data acquisition module, and electrical equipment. The control module is connected to the input end of the BMS (battery management system); the output end of the BMS is connected to the input end of the control module; the control module is connected to the battery pack and electrical equipment respectively; the BMS (battery management system) is connected to the wireless communication module and the display module respectively through the communication interface, and the output end of the acquisition module is connected to the input end of the BMS (battery management system); the BMS (battery management system) is connected to the server end through the wireless communication module.



Main functions of BMS (Battery Management System)

1. Measurement of single battery voltage;

2. Energy balance between single batteries;

3. Measurement of total voltage of battery pack;

4. Measurement of total current of battery pack;

5. SOC calculation: Accurately estimate the state of charge (SOC) of the power battery pack, that is, the remaining power of the battery, to ensure that the SOC is maintained within a reasonable range and prevent damage to the battery due to overcharging or over-discharging.

6. Dynamic monitoring of the working status of the power battery pack: During the charging and discharging process of the battery pack, the terminal voltage and temperature, charging and discharging current and total voltage of each battery in the battery pack are collected in real time to prevent overcharging or over-discharging of the battery pack.

7. Real-time data display;

8. Data recording and analysis: Select batteries with problems to maintain the reliability and efficiency of the entire battery operation.

9. Communication networking function.

Product Overview

Huawen has independent research and development capabilities and is very mature in battery management system (BMS) and protection circuit technology. These systems can not only effectively manage the charging and discharging process of the battery, but also ensure the safety of the battery during use and extend its service life. In addition, Huawen has also made certain achievements in the field of uninterruptible power supply (UPS). The company's newly launched 12VDC and 24VDC off-grid solar UPS systems are designed for various application scenarios, including but not limited to wireless access points (AP), IP iPhones, antennas, and closed-circuit television monitoring systems (CCTV).

The main components of Solar UPS-2448PoE products are: LiFePO4 battery pack, solar panel, smart MPPT controller, anodized metal casing, galvanized steel bracket.

LiFePO4 battery pack uses lithium iron phosphate as the positive electrode and carbon as the negative electrode. It is a type of lithium-ion battery with high energy density and long life. The rated voltage of each battery is 3.2V, and the charging end voltage is 3.6V~3.65V. Due to its stability and safety, it is widely used in electric vehicles, energy storage systems and portable electronic devices. LiFePO4 battery pack can store and efficiently transmit energy. Solar panels continuously provide energy to the battery pack and convert it into electrical energy. The smart MPPT controller is connected to the Android APP Solar power 2.0, which allows users to monitor the operating status of the battery pack, solar panels, and powered equipment in real time.



Below, Huawen will take this customer as an example to introduce in detail the powered devices matched by the Solar UPS-2448PoE product.

We noticed that customers have extremely high requirements for the stability and safety of power supply. Therefore, the Solar UPS-2448PoE product is specially designed with a single-channel input energy from the solar panel, which is converted into electrical energy for charging the battery pack through the intelligent MPPT controller. The battery pack transmits the electrical energy to the powered device (PD) to ensure efficient use of energy.

We collect customer requirements and product information.





Powered device
48V POE 13.5W CCTV system




Operating voltage
44V~56V


Peak current
0.5A


Maximum operating power
13.5W


Usage environment
outdoor


Operation requirement
24 hours non-stop


Connection port
RJ45


Mains electricity
non




Provide the best solution according to customer requirements.

Solar Panel Description





Solar panel
36V 150W


Cell type
Mono


Panel size
1030*760*30mm




Panel weight
7.6kg


Connector
Waterproof MC4


Cable
1000mm lenght


Waterproof grade
IP67


Transformation efficiency
≥21%


Working temperature
-40℃~+85℃


Useful years
With reasonable use, its lifespan can be as long as more than 25 years


Bracket
Embrace pole bracket


Bracket weight
Approx 15kg





Battery Description




Charging
29.2V/15A(Max)MC4 Connector




Port1&2
MC4 Positive & negative electrode


Port3
48V2A Hi-POE-RJ45


Port4
Uplink-RJ45(10mbs/100mbs)


Port5
12VDC


Port6
24VDC


POE
IEEE 802.3 BT/AT/AF


Battery pack
LiFePO4-8S1P(27Ah/30Ah-SQLFP)


Battery capacity
25.6V27Ah/30Ah(691.2Wh/768Wh)


Battery cycle
2000 times at 80% DOD


Battery size
340*300*185mm


Battery weight
Approx 10.5kg




Product Advantages


Stable power supply: UPS can provide continuous and stable power output to meet the high power requirements of equipment and ensure that equipment will not be interrupted due to power problems at critical moments.
Intelligent BMS (Battery Management System): Through advanced technical means, it monitors and manages the operating status of the battery in real time, optimizes battery performance, extends battery service life, and ensures that the battery can be used safely in various environments.
High safety performance: UPS ensures that the product can remain stable and safe under various environments, avoids safety accidents caused by battery failure, and provides users with safety protection.
Improve work efficiency: The high performance and long-life design of the battery enable the equipment to maintain efficient operation for a long time, reducing downtime caused by battery replacement and charging, thus significantly improving the overall work efficiency.
Data protection: Through the intelligent battery management system, data loss and damage can be effectively prevented, ensuring that the user's important data is fully protected and avoiding data loss caused by battery failure.
Economical and environmentally friendly: Make full use of environmental resources, convert solar energy into electrical energy, store it in batteries, and provide stable power for electronic devices.

Mini UPS: Small Power, Big Reliability — Development and Application
With the rise of smart devices and decentralized power demands, traditional large UPS systems no longer fit all applications. The Mini UPS (Miniature Uninterruptible Power Supply) emerged to fill this gap — offering a compact, smart backup solution built around modern lithium battery technologies.

1. Background and Evolution
The demand for portable power protection for small electronics like routers, smart cameras, and IoT gateways has grown rapidly. Traditional UPS systems are bulky, expensive, and often overkill for these smaller devices. Mini UPS solutions provide an ideal alternative — compact, cost-effective, and plug-and-play.

2. Technical Architecture
Mini UPS devices typically feature DC output powered by embedded rechargeable lithium batteries and are managed by a smart BMS (Battery Management System).


Battery: 18650 / 21700 lithium or LiFePO₄ cells (7.4V, 11.1V, 12.8V)
Input: DC 5V / 9V / 12V (constant current-constant voltage charging)
Output: 5V, 9V, 12V, or 24V DC
Switching: Seamless switch-over within ≤10ms
Protection: Overcharge, over-discharge, overcurrent, short-circuit, and temperature protection

Sample Specs (Huawen Mini UPS Series):
- Battery: 7.4V 5200mAh or 11.1V 7800mAh
- Input: DC 12V/2A | Output: 12V±5% (5V/9V/24V optional)
- Switching time: ≤10ms | Charging time: 4–6 hours
- Operating temperature: -10°C ~ +50°C | Interface: DC5521, USB, RJ45
3. Key Application Scenarios

Networking: Routers, modems, WiFi repeaters — stay online during outages
Security: Smart locks, cameras, doorbells — uninterrupted monitoring
Industrial IoT: PLCs, sensors, control units — ensure data continuity
Medical: Home oxygen machines, insulin pumps — critical operation backup
Smart Home: Gateways, lighting hubs, speakers — improved reliability

4. Lithium Battery Advantage



Aspect
Lead-acid
Lithium (NCM / LiFePO₄)




Energy Density
30–50 Wh/kg
120–250 Wh/kg


Cycle Life
300–500
800–3000+


Weight
Heavy
Light (1/3–1/4)


Discharge
Moderate
Stable, high current


Safety & Eco
Contains lead
No toxic elements, recyclable


Cost Efficiency
Lower upfront
Lower lifecycle cost



5. Future Trends & Huawen Solutions
As edge computing, AIoT, and smart security evolve, Mini UPS will continue to develop toward:


📱 Smart monitoring via app or cloud
📦 Ultra-compact structural design
🛡 Enhanced BMS with thermal, SOC, and SOH diagnostics
🌱 100% lithium-based and recyclable

Huawen New Power offers end-to-end Mini UPS customization, from battery pack design to PCBA integration and casing solutions. Our team supports OEM/ODM services to power your unique business scenario.

Conclusion
Mini UPS systems are no longer scaled-down versions of traditional UPS — they are smart, efficient energy tools essential for connected devices. With lithium battery advancements, their performance and reliability continue to improve. Huawen stands ready to deliver intelligent, compact backup power you can count on.

🔋 Browse Mini UPS Products | 📩 Contact for Custom Quote

How to Choose the Right Cylindrical Cell Type for Your Application
Cylindrical lithium cells such as 18650, 21700, and 32700 are widely used in battery packs across industries including power tools, energy storage, medical devices, and electric vehicles. Selecting the right cell type is essential to achieving optimal safety, runtime, performance, and overall system cost.

Why Cell Format Matters

Determines energy capacity and runtime
Influences discharge capability and power output
Affects thermal management and safety
Impacts pack size, weight, and assembly cost

Common Cylindrical Cell Sizes and Their Characteristics



Cell Type
Typical Capacity (mAh)
Max Continuous Discharge
Typical Applications


18650
2000–3500 mAh
10A–30A
Laptops, flashlights, e-bikes, UPS backup


21700
4000–5500 mAh
15A–45A
Power tools, e-motorcycles, energy storage


32700
6000–9000 mAh
50A+
Solar ESS systems, RV batteries, industrial equipment



Key Factors to Consider When Selecting Cylindrical Cells
1. Energy Density vs. Power Output
If you need long runtime, choose high-capacity cells. If you need high current, choose high-drain performance cells.

2. Battery Chemistry

NMC / NCA: higher energy density, suitable for compact high-performance devices
LFP (LiFePO₄): safer, longer cycle life, ideal for energy storage and industrial systems

3. Discharge Rate Requirements
Power tools and EV applications require high continuous current — check manufacturer spec sheets for real current ratings.

4. Temperature Performance
Consider operating conditions such as outdoor, automotive, or extreme environments.

5. Mechanical Layout and Pack Size
21700 & 32700 cells reduce the number of cells required, lowering assembly complexity and BMS cost.

Recommended Cylindrical Cell Selection by Application



Application Type
Suggested Cell
Reason


Power Tools / High-Peak Current
21700 High-Discharge or 32700 LFP
Strong power output and thermal stability


Portable Electronics
18650 NMC
Compact size, lightweight, cost-effective


Solar ESS / Backup Storage
32700 LiFePO₄
Long cycle life and highest safety


Electric Motorcycles / Mobility
21700 NMC
High energy density with good discharge performance



Conclusion
Choosing the right cylindrical cell type depends on balancing size, energy capacity, discharge requirements, safety, and cost. Evaluating your application goals and working with an experienced battery manufacturer ensures reliable and well-optimized performance.

Huawen New Power provides customized lithium battery packs using 18650, 21700, and 32700 cylindrical cells and supports cell matching, BMS design, and OEM/ODM production.