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Mean Well NPB-450-48 Battery Charger 450W 48V - Wide Charging Voltage 6.8A

ultra wide charging range auto sensing functioncharging voltage/current/timeout can be programmed through SBP-001charging curves/stages can be selected through dip switch
SKU NPB-450-48
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Overview

NPB-450-48 is the model of this series: typical efficiency 93%. Type Blank: Blank: Non-NFC function.

NPB-450 is a miniaturized, versatile, and ultra-widee voltage intelligent charger. It utilizes a fully digital control design with automatic battery voltage detection technology, with five key features including intelligent, versatile, user friendly, safe, and compact. The series have four models with output voltage ranges of 10.5~21V, 21~42V, 42~80V, and 54~100V respectively. The charging voltage range of each model is wide enough to cover a variety of different battery voltages and battery chemistries, and there is a built-in intelligent voltage detection charging mode (Note this mode is set to OFF by factory default and is suitable for lithium batteries with BMS only). The NPB-450 can pair with MEAN WELL's SBP-001 programmer for digital configuration or can be accessed through mobile APP with the built-in NFC interface(NFC models) , such as select 2/3 stage charging, adjust charging voltage/current, and set charging cycle time to protect battery lifetime. Through the user-friendly DIP S.W. on front panel, user may also directly adjust the 2/3 stage charging, current (50~100%), and select between the 4 types of preset charging curves. In addition, a CANBus communication protocol is built in to meet professional applications, which allows remote controlling and monitoring for the status of the charger. In terms of safety, it has intelligent detection for proper battery voltage and connection as well as protection from reverse polarity. It passes ITE IEC/EN/UL62368-1 and household appliancies EN60335-1/-2-29 dual safety(NFC models only pass information IEC/EN/UL62368 safety certification) and 3-year warranty to guarantee reliable operation . The NPB-450 is truly an intelligent, safe, and reliable universal charger with outstanding cost performance.

Features

  • Auto ranging with ultra-wide charging voltage (10.5~21V, 21~42V, 42~80V, 54~100V ; Please refer to page 9 for setting)
  • Built-in CANBus protocol for control, setting and monitoring
  • Set up charging parameters easily via NFC interface(NPB-450-xxNFC)
  • Programmable charging curve via SBP-001
  • Manual setting for 2/3 stage and 4 built-in charging curves via DIP S.W
  • Multiple protections: Short circuit / Over voltage / Over temperature/ Battery under voltage /Battery reverse polarity (No damage)
  • Charger OK and Battery Full signal
  • Temperature compensation function to prolong battery life (Lead-acid only)
  • -30℃~+70℃ wide operating temperature
  • Thermal controlled DC fan for noise reduction
  • Remote ON/OFF control
  • Smart programmer available (Order NO.: SBP-001 , sold separately)
  • Carr y handle accessory available(Order NO.: Carry handle, sold separately)
  • Comply with 62368-1 + 60335-1/-2-29 dual certification
  • Suitable for lead-acid (Pb) and li-ion batteries
  • 3 years warranty

Model encoding

TypeFunction
Blank (this model)Blank: Non-NFC function
NFCNFC: Built-in NFC function

Specifications

NPB-450-48Specifications from the official datasheet (2026-07-06 edition)

OUTPUT

BOOST CHARGE VOLTAGE(Vboost)(default)
57.6V
FLOAT CHARGE VOLTAGE(Vfloat)(default)
55.2V
CHARGE VOLTAGE RANGENote.3
42 ~ 80V
MAX. OUTPUT CURRENT(CC)Note.4
6.8A
MAX. POWERNote.4
456.96W
RECOMMENDED BATTERY CAPACITY (AMP HOURS)Note.5
24 ~ 80AH
LEAKAGE CURRENT FROM BATTERY (Typ.)
<1mA

INPUT

VOLTAGE RANGENote.6
90 ~ 264VAC / 127 ~ 370VDC
FREQUENCY RANGE
47 ~ 63Hz
POWER FACTOR (Typ.)
PF>0.98/115VAC, PF>0.95/230VAC at full load
EFFICIENCY (Typ.)Note.7
93%
AC CURRENT (Typ.)
4.5A/115VAC / 2.2A/230VAC
INRUSH CURRENT (Typ.)
COLD START 50A at 230VAC
LEAKAGE CURRENT
<0.75mA/240VAC

PROTECTION

SHORT CIRCUITNote.8
Protection type : Constant current limiting, charger will shutdown after 5 sec, re-power on to recover
OVER VOLTAGENote.9
82 ~ 100V
OVER VOLTAGE (Protection type)
Protection type : Shut down and latch off o/p voltage, re-power on to recover
REVERSE POLARITY
Protected internal reverse detection, No damage, re-power on to recover after fault condition is removed
OVER TEMPERATURE
Shut down O/P voltage, recovers automatically after temperature goes down

FUNCTION

CHARGING STAGE
2 or 3 stage selectable through DIP S.W on panel
CHARGING PARAMETERS ADJUSTABLE (Programmable)
Programmable: Constant current(CC),Tapper current(TC), Constant voltage(CV) and Float voltage(FV) can be set through SBP-001 with computer
CHARGING PARAMETERS ADJUSTABLE (Manual setting)
Manual setting: 4 built-in charging curves adjustable via DIP S.W on panel, Please refer to function manual for more detail
AUTO RANGING FOR CHARGING (Typ.)
Please refer to functin manual for more detail (page 10); Charging current adjustable 50~100% by via potentiometer on panel (Only for auto ranging mode)
CANBUS INTERFACE
CANBus 2.0B, Can control, Setting and monitoring(Vo,Io,charging curve, internal temp. and DC output ON/OFF)
CHARGER OK
The TTL signal out, Charger OK = H(4.5 ~ 5.5V) ; Charger failure or protection status =L( -0.5 ~ +0.5V)
BATTERY FULL SIGNAL
The TTL signal out, Battery full = H(4.5 ~ 5.5V ); Charging = L(-0.5 ~ +0.5V)
REMOTE CONTROL
Short : Charger normal work / Open : Charger stop charging
TEMPERATURE COMPENSATION
By external NTC
FAN SPEED CONTROL
Depends on internal temperature

ENVIRONMENT

WORKING TEMP.
-30 ~ +70℃ (Refer to "Derating Curve")
WORKING HUMIDITY
20 ~ 95% RH non-condensing
STORAGE TEMP., HUMIDITY
-40 ~ +85℃, 10 ~ 95% RH non-condensing
TEMP. COEFFICIENT
Β±0.05%/℃ (0 ~ 50℃)
VIBRATION
10 ~ 500Hz, 2G 10min./1cycle, 60min. each along X, Y, Z axes

SAFETY & EMC (Note 10)

SAFETY STANDARDS
CB IEC62368-1,IEC60335-1/2-29, Dekra BS EN/EN62368-1,BS EN/EN60335-1/2-29, UL62368-1, J62368-1, EAC TP TC 004 approved
WITHSTAND VOLTAGE
I/P-O/P:3KVAC I/P-FG:2KVAC O/P-FG:0.5KVAC
ISOLATION RESISTANCE
I/P-O/P, I/P-FG, O/P-FG:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION (Conducted)
BS EN/EN55032 (CISPR32),BS EN/EN55014-1; Class B
EMC EMISSION (Radiated)
BS EN/EN55032 (CISPR32),BS EN/EN55014-1; Class B
EMC EMISSION (Harmonic Current)
BS EN/EN61000-3-2; Class A
EMC EMISSION (Voltage Flicker)
BS EN/EN61000-3-3; -----
EMC IMMUNITY
BS EN/EN61000-6-2,J55032(H29)
EMC IMMUNITY (ESD)
BS EN/EN61000-4-2; Level 3, 8KV air ; Level 2, 4KV contact
EMC IMMUNITY (Radiated)
BS EN/EN61000-4-3; Level 2, 3V/m
EMC IMMUNITY (EFT / Burst)
BS EN/EN61000-4-4; Level 2, 1KV
EMC IMMUNITY (Surge)
BS EN/EN61000-4-5; Level 2, 1KV/Line-Line,Level 3, 2KV/Line-Earth
EMC IMMUNITY (Conducted)
BS EN/EN61000-4-6; Level 2, 3Vrms
EMC IMMUNITY (Magnetic Field)
BS EN/EN61000-4-8; Level 1, 1A/m
EMC IMMUNITY (Voltage Dips and Interruptions)
BS EN/EN61000-4-11; >95% dip 0.5 periods, 30% dip 25 periods, >95% interruptions 250 periods

OTHERS

MTBF
821.0K hrs min. Telcordia SR-332 (Bellcore) ; 83.4K hrs min. MIL-HDBK-217F (25℃)
DIMENSION
205*135*55mm (L*W*H)
PACKING
1.38Kg; 8pcs/ 12.05Kg / 1.71CUFT

NOTE

1
Modification for charger specification may be required for different battery specification. Please contact battery vendor and MEAN WELL for details.
2
All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25℃ of ambient temperature.
3
This is the range when programming Vboost or Vfloat by using SBP-001, the smart battery charging programmer.
4
Refer to derating curve.
5
This is MEAN WELL's suggested range. Please consult your battery manufacturer for their suggestions about maximum charging current limitation.
6
Derating may be needed under low input voltages. Please check the derating curve for more details.
7
The efficiency is measured at 16.8V charge voltage(12V model), 33.6V charge voltage(24V model), 67.2V charge voltage(48V model), 84V charge voltage(72V model).
8
This protection mechanism is specified for the case the short circuit occurs after the charger is turned on.
9
Each model incorporates a MCU-controlled dynamic over voltage protection, which is about 125% of Vboost over Constant Current stage and Constant Voltage stage whereas 125% of Vfloat over Float stage.
10
The charger is considered a component which will be installed into a final equipment. The final equipment must be re-confirmed that it still meets EMC directives. For guidance on how to perform these EMC tests, please refer to "EMI testing of component power supplies." (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf )
11
The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than 2000m(6500ft).

Technical drawings

NPB-450-48 Block Diagram
Block Diagram
NPB-450-48 Derating Curve
Derating Curve
NPB-450-48 MEAN WELL APP Download
MEAN WELL APP Download
NPB-450-48 1.Manual setting
1.Manual setting
NPB-450-48 β—Ž 2 stage charging curve
β—Ž 2 stage charging curve
NPB-450-48 2.Programmable charging curve
2.Programmable charging curve
NPB-450-48 Step 2
Step 2
NPB-450-48 Step 2 (2)
Step 2 (2)
NPB-450-48 NPB-450/NPB-450-xxNFC pin assigment
NPB-450/NPB-450-xxNFC pin assigment
NPB-450-48 β€» Software Interface
β€» Software Interface
NPB-450-48 β€» When using the auto ranging charging curve function,…
β€» When using the auto ranging charging curve function,…
NPB-450-48 (1) Default factory setting is OFF via DC output side…
(1) Default factory setting is OFF via DC output side…
NPB-450-48 β€» Back to non-auto ranging as following
β€» Back to non-auto ranging as following
NPB-450-48 NPB-450 series
NPB-450 series
NPB-450-48 5.CANBus communication interface
5.CANBus communication interface

Typical applications

  • E-Bike, E-Scooter, Camping car, Bus, Specialty vehicles
  • Roboti law n mower
  • Washing robot
  • Recreation craft, Personal yacht or workboat
  • Surveillance system
  • Telecommunication base station
  • Radio system backup solution
  • Equipments or instruments with back-up battery

Downloads

FAQ

What is the Mean Well NPB-450-48 designed for?

The NPB-450-48 is a 450W-series battery charger intended for charging 48V-class battery systems in professional and industrial settings. It is positioned as an intelligent general-purpose charger with a wide charging voltage range and support for both lead-acid and lithium batteries.

What are the main electrical ratings of the NPB-450-48?

This model has a default boost charge voltage of 57.6V (55.2V float), a maximum charging current of 6.8A and a maximum power of 456.96W. Those published ratings make it suitable for buyers comparing charger power, voltage, and charge current at a glance.

Can the NPB-450-48 work with different battery voltage ranges?

Within its own band, yes: the NPB-450-48 has a 42 ~ 80V charge voltage range, and its auto ranging mode (off by default, for lithium batteries with BMS only) detects the connected battery voltage and adjusts charging voltage. Other NPB-450 models cover 10.5 ~ 21V, 21 ~ 42V and 54 ~ 100V.

Is the NPB-450-48 compatible with both lead-acid and lithium batteries?

Yes, this charger is described as suitable for both lead-acid and lithium batteries. It also offers selectable default charging curves and adjustable 2-stage or 3-stage charging behavior, which helps support different battery chemistry requirements within the product's intended use.

Does the NPB-450-48 support monitoring or programmable charging settings?

Yes. It has built-in CANbus protocol, and charging voltage, charging current, and timeout can be programmed through the optional SBP-001 interface. In addition, in auto ranging mode the charging current can be adjusted on the panel from 50% to 100% of rated current.

Is the NPB-450-48 suitable for demanding environmental conditions?

This model is specified for operation from -30Β°C to +70Β°C, which supports use in a wide range of industrial environments. Its fan speed is controlled by internal temperature, and it includes automatic derating under over-temperature conditions.

What certifications and warranty does the NPB-450-48 include?

The charger is approved to CB IEC62368-1 and IEC60335-1/2-29, BS EN/EN62368-1 and BS EN/EN60335-1/2-29, UL62368-1, J62368-1 and EAC TP TC 004. The datasheet does not state a warranty period.

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Mean Well NPB-450-48 Battery Charger 450W 48V - Wide Charging Voltage 6.8A
Mean Well

Mean Well NPB-450-48 Battery Charger 450W 48V - Wide Charging Voltage 6.8A

Log in to see price

NPB-450-48 is the model of this series: typical efficiency 93%. Type Blank: Blank: Non-NFC function.

NPB-450 is a miniaturized, versatile, and ultra-widee voltage intelligent charger. It utilizes a fully digital control design with automatic battery voltage detection technology, with five key features including intelligent, versatile, user friendly, safe, and compact. The series have four models with output voltage ranges of 10.5~21V, 21~42V, 42~80V, and 54~100V respectively. The charging voltage range of each model is wide enough to cover a variety of different battery voltages and battery chemistries, and there is a built-in intelligent voltage detection charging mode (Note this mode is set to OFF by factory default and is suitable for lithium batteries with BMS only). The NPB-450 can pair with MEAN WELL's SBP-001 programmer for digital configuration or can be accessed through mobile APP with the built-in NFC interface(NFC models) , such as select 2/3 stage charging, adjust charging voltage/current, and set charging cycle time to protect battery lifetime. Through the user-friendly DIP S.W. on front panel, user may also directly adjust the 2/3 stage charging, current (50~100%), and select between the 4 types of preset charging curves. In addition, a CANBus communication protocol is built in to meet professional applications, which allows remote controlling and monitoring for the status of the charger. In terms of safety, it has intelligent detection for proper battery voltage and connection as well as protection from reverse polarity. It passes ITE IEC/EN/UL62368-1 and household appliancies EN60335-1/-2-29 dual safety(NFC models only pass information IEC/EN/UL62368 safety certification) and 3-year warranty to guarantee reliable operation . The NPB-450 is truly an intelligent, safe, and reliable universal charger with outstanding cost performance.

Features

  • Auto ranging with ultra-wide charging voltage (10.5~21V, 21~42V, 42~80V, 54~100V ; Please refer to page 9 for setting)
  • Built-in CANBus protocol for control, setting and monitoring
  • Set up charging parameters easily via NFC interface(NPB-450-xxNFC)
  • Programmable charging curve via SBP-001
  • Manual setting for 2/3 stage and 4 built-in charging curves via DIP S.W
  • Multiple protections: Short circuit / Over voltage / Over temperature/ Battery under voltage /Battery reverse polarity (No damage)
  • Charger OK and Battery Full signal
  • Temperature compensation function to prolong battery life (Lead-acid only)
  • -30℃~+70℃ wide operating temperature
  • Thermal controlled DC fan for noise reduction
  • Remote ON/OFF control
  • Smart programmer available (Order NO.: SBP-001 , sold separately)
  • Carr y handle accessory available(Order NO.: Carry handle, sold separately)
  • Comply with 62368-1 + 60335-1/-2-29 dual certification
  • Suitable for lead-acid (Pb) and li-ion batteries
  • 3 years warranty

Typical applications

  • E-Bike, E-Scooter, Camping car, Bus, Specialty vehicles
  • Roboti law n mower
  • Washing robot
  • Recreation craft, Personal yacht or workboat
  • Surveillance system
  • Telecommunication base station
  • Radio system backup solution
  • Equipments or instruments with back-up battery
View product

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