Leyu provides UPS power supplies with battery charging and DC backup functions for systems that need to remain powered when the main AC supply is interrupted.
Unlike a standard AC-DC switching power supply, a UPS charging power supply can support the DC load during normal operation while maintaining a compatible external backup battery. When the AC input is lost, the battery can provide temporary DC power to critical equipment according to the design and wiring of the selected model.
Leyu's UPS charging range includes solutions for 12V, 24V and higher-voltage DC systems, with AD, ADD, SC and SCP series available for different output, charging and backup requirements. Current products are designed for applications such as security systems, access control, industrial controls, communication equipment and building automation.
Series | Main Configuration | Voltage Direction | Recommended Application |
|---|---|---|---|
AD Series | Main DC output + battery charging | 12V / 24V / higher-voltage systems | General backup power and industrial control |
ADD Series | Multiple DC outputs + battery charging | Multi-voltage systems | Equipment requiring auxiliary control voltage |
SC Series | DC output + smart battery charging | 12V / 24V systems | Security, control and backup applications |
SCP Series | DC UPS power + battery backup | 12V / 24V systems | CCTV, access control and industrial controls |
The correct model should be selected according to load voltage, load current, battery voltage, charging requirements and required backup time, rather than rated wattage alone.
The AD Series combines regulated DC power, battery charging and backup functionality in one enclosed AC-DC power supply.
The AD-155 family includes versions for approximately 12V, 24V and higher-voltage battery systems. The current series provides separate load and battery-charging outputs and includes battery low-voltage and polarity protection features.
It is suitable for projects where the equipment must operate from AC power during normal conditions while maintaining an external backup battery for power interruptions.
Typical applications:
Security systems
Access control
Industrial controllers
Communication equipment
Building automation
Backup control systems
The ADD Series is suitable for systems that require battery charging together with more than one DC voltage.
For example, the current ADD-155B configuration includes a main DC output, an auxiliary 5V output and a separate battery charging output, allowing one power unit to support different circuits within the same equipment.
This configuration can be useful when equipment contains:
Main DC loads
Low-voltage control electronics
Backup battery requirements
Best suited for:
Industrial control equipment
Integrated security systems
Communication devices
Electronic systems with auxiliary control circuits
The SC Series UPS Charger is designed for backup power and battery charging applications.
The current SC-120 series includes 12V-class and 24V-class configurations. It combines regulated DC power with charging functions and includes electrical protection features for industrial and commercial backup applications.
Best suited for:
Security equipment
Access control
Alarm systems
Building automation
Industrial backup power
The SCP Series provides regulated DC output with UPS backup capability for equipment that must continue operating during temporary AC power interruptions.
The SCP-120 series currently includes approximately 12V / 8A and 24V / 4A configurations, with universal AC input, fanless cooling and battery-related protection functions.
Best suited for:
CCTV systems
Access control
Alarm systems
Industrial controllers
Monitoring equipment
DC-powered security systems
A UPS charging power supply combines three functions within one power system:
AC-DC power conversion + DC load supply + external battery charging
During normal operation, AC input is converted into regulated DC power for the connected load while a compatible external battery is maintained or charged according to the product design.
When the AC input fails, the backup battery can provide power to the DC load through the UPS circuit or configured connection, helping critical equipment continue operating during the interruption.
This makes a UPS charging power supply different from a conventional switching power supply that only converts AC input into DC output. The AD-155 series, for example, is specifically designed with load and float-charge outputs plus battery backup functionality.
AC Input → UPS Charging Power Supply → DC Load
At the same time:
UPS Charging Power Supply → External Battery Charging
The equipment operates from the AC-DC power supply while the battery remains available for backup.
External Battery → UPS Circuit → DC Load
The battery supplies temporary DC power to the connected equipment according to the wiring and operating logic of the selected model.
When AC power returns, the power supply resumes normal operation and the battery charging process can continue.
The exact switching method, charging behavior and battery connection vary by model, so the product wiring diagram and technical specifications should always be checked before installation.
A 12V UPS power supply is suitable for equipment designed around a 12V-class DC system.
Common applications can include:
CCTV equipment
Access control
Alarm systems
Security devices
Monitoring equipment
For example, the SCP-120-12 is rated at 13.8V / 8A for a 12V-class backup system.
A 24V UPS power supply is suitable for industrial and control systems using a 24V-class DC architecture.
Typical applications can include:
PLC control systems
Industrial controllers
Access control
Building automation
Communication equipment
Monitoring systems
The current SCP-120-24 provides 27.6V / 4A, while the AD-155B also uses a 27.6V main output with a separate battery charging channel.
Some equipment may require a higher DC voltage than standard 12V or 24V systems.
The AD-155 family includes a higher-voltage configuration in addition to its 12V- and 24V-class versions.
For these applications, confirm:
Required DC load voltage
Battery bank voltage
Charging voltage
Load current
Backup runtime
before choosing a model.
The backup battery is a critical part of any DC UPS system.
Before connecting a battery, confirm that the selected power supply and battery are electrically compatible.
Key factors include:
The battery nominal voltage must match the charging and backup requirements of the power supply.
A 12V-class supply should not automatically be assumed to support a 24V battery system, and vice versa.
Different battery chemistries require different charging characteristics.
Do not connect a battery simply because its nominal voltage appears compatible. Confirm that the charger is designed for the battery type and charging method used in your project.
For example, the AD-155 documentation specifically describes a float-charging arrangement for backup batteries.
Battery capacity is normally expressed in ampere-hours (Ah).
A larger-capacity battery can generally provide longer backup duration, but it may also require more time to recharge when charging current is limited.
Check the available charging current of the selected UPS power supply.
Charging current affects how quickly the battery can recover after a discharge.
Deep battery discharge can reduce usable battery life or cause system problems.
Selected Leyu UPS charging products include battery low-voltage or battery-related protection functions depending on model.
Backup runtime should be considered before choosing the battery and UPS charging power supply.
The actual operating time during a power outage depends on several factors:
Battery voltage
Battery capacity
DC load current
Total load power
Battery age and condition
Discharge characteristics
Operating temperature
System losses
A system designed only to bridge short power interruptions may require a smaller battery than equipment that must continue running for several hours.
For project evaluation, provide both your maximum DC load and your required backup time.
For example:
Load: 24V / 2A
Required Backup: 2 hours
This information allows the battery capacity and charging requirements to be evaluated together instead of selecting the power supply by wattage alone.
Identify the voltage required by the connected equipment.
Typical system voltage classes include:
12V
24V
Higher-voltage DC systems
Add the maximum current required by all devices that need to remain powered.
This is especially important for systems containing cameras, controllers, locks, relays, communication modules or other equipment operating simultaneously.
The external battery must match the backup and charging architecture of the selected UPS power supply.
Always verify the manufacturer's battery connection specifications.
Decide how long the equipment needs to remain operational after AC power fails.
This may range from short interruption protection to several hours of backup depending on the application.
A larger battery does not automatically mean a better system.
If battery capacity increases while available charging current remains low, full recharge time may increase significantly.
Choose the battery and charger as one system.
Some equipment only needs one main DC load output plus battery charging.
Other systems may require an additional low-voltage supply for control electronics.
For these applications, a multi-output configuration such as the ADD Series may be more suitable.
Depending on model, review functions such as:
Battery low-voltage protection
Battery polarity protection
Short-circuit protection
Overload protection
Over-voltage protection
Current AD-155 and SCP-120 specifications list several of these protection functions.
Confirm:
Available installation space
Ventilation
Ambient temperature
Wiring method
Battery location
Required enclosure
Battery and power supply operating temperature can affect overall system performance.
Feature | UPS Charging Power Supply | Standard Switching Power Supply |
AC to DC Conversion | Yes | Yes |
Powers DC Load | Yes | Yes |
Battery Charging | Yes, depending on model | Normally no |
External Battery Connection | Supported | Normally not designed for backup |
Power During AC Failure | Battery backup available | Output normally stops |
Typical Application | Critical DC loads | General DC equipment |
Choose a UPS charging power supply when the connected system needs battery backup during an AC interruption.
If backup power is not required, a conventional Single Output Power Supply may provide a simpler solution.
Cameras, monitoring devices and security equipment may need to remain active during a temporary mains power interruption.
A battery-backed DC power supply can maintain suitable security loads when the AC input is unavailable.
Access controllers, card readers and associated locking systems can require backup power to maintain critical access functions.
Alarm and monitoring equipment often benefits from battery backup so that the system remains operational during an AC power outage.
PLCs, HMIs, RTUs and controllers used in critical industrial processes may require temporary backup power to maintain control, communication or monitoring functions.
Routers, gateways and communication controllers can use DC backup power to reduce interruptions caused by temporary mains failures.
Building monitoring, control gateways and other automation equipment can use battery-backed power where continuity is required.
Current Leyu UPS charging products are positioned for security, industrial control, communication and building-control applications.
For projects where a standard model does not fully match the electrical or backup requirements, OEM or ODM configurations can be evaluated according to the project specification.
Please provide:
AC input voltage
DC load voltage
Maximum load current
Battery voltage
Battery type
Battery capacity
Required backup time
Charging requirements
Auxiliary output requirements
Installation dimensions
Target market
Estimated quantity
Providing both load and battery information helps determine whether an existing AD, ADD, SC or SCP series product is suitable or whether a customized solution should be considered.
Power Supply
Browse Leyu's complete industrial power supply range.
Single Output Power Supply
For equipment requiring one regulated DC output without battery backup.
Multiple Output Power Supply
For systems requiring two or more DC output voltage rails.
DIN Rail Power Supply
For PLC panels, industrial control cabinets and DIN rail installations.
DC-DC Switching Power Supply
For systems requiring conversion from one DC voltage level to another.
A UPS charging power supply combines AC-DC power conversion with battery charging and backup functionality. During normal operation it powers the DC load and supports battery charging. When AC power is interrupted, a compatible external battery can supply the connected load according to the design of the selected model.
The power supply may still operate as an AC-DC supply without a battery on selected models, but the UPS backup function requires a compatible external battery. For example, the AD-155 can provide its main output without a connected battery, while backup operation requires the battery connection.
A standard switching power supply normally provides DC output only while AC input is available. A UPS charging power supply adds battery charging and backup capability so that selected DC loads can continue operating during an AC interruption.
Use the voltage required by your load and backup battery system. A 12V-class system requires a compatible 12V-class UPS configuration, while equipment operating from a 24V-class DC bus requires a corresponding 24V solution.
Backup time depends on battery capacity, load current, battery condition, temperature and system losses. Provide the required DC voltage, maximum load current and desired backup duration so the battery and charging configuration can be evaluated together.
To receive a model recommendation, send us the key electrical and backup requirements for your project:
Based on these requirements, our team can help evaluate a suitable AD, ADD, SC or SCP Series UPS charging power supply for your application.
