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Mean Well NPB-450-12 Battery Charger 450W 12V - Wide Charging Voltage 25A

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-450-12

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Overview

NPB-450-12 is the model of this series: typical efficiency 92%. 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

Type	Function
Blank (this model)	Blank: Non-NFC function
NFC	NFC: Built-in NFC function

Specifications

NPB-450-12Specifications from the official datasheet (2026-07-06 edition)

OUTPUT

BOOST CHARGE VOLTAGE(Vboost)(default): 14.4V
FLOAT CHARGE VOLTAGE(Vfloat)(default): 13.8V
CHARGE VOLTAGE RANGE^Note.3: 10.5 ~ 21V
MAX. OUTPUT CURRENT(CC)^Note.4: 25A
MAX. POWER^Note.4: 420W
RECOMMENDED BATTERY CAPACITY (AMP HOURS)^Note.5: 90 ~ 300AH
LEAKAGE CURRENT FROM BATTERY (Typ.): <1mA

INPUT

VOLTAGE RANGE^Note.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: 92%
AC CURRENT (Typ.): 4.5A/115VAC / 2.2A/230VAC
INRUSH CURRENT (Typ.): COLD START 50A at 230VAC
LEAKAGE CURRENT: <0.75mA/240VAC

PROTECTION

SHORT CIRCUIT^Note.8: Protection type : Constant current limiting, charger will shutdown after 5 sec, re-power on to recover
OVER VOLTAGE^Note.9: 21.5 ~ 26V
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: ±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-450-12 Block Diagram — Block Diagram

NPB-450-12 Derating Curve — Derating Curve

NPB-450-12 MEAN WELL APP Download — MEAN WELL APP Download

NPB-450-12 1.Manual setting — 1.Manual setting

NPB-450-12 ◎ 2 stage charging curve — ◎ 2 stage charging curve

NPB-450-12 2.Programmable charging curve — 2.Programmable charging curve

NPB-450-12 NPB-450/NPB-450-xxNFC pin assigment — NPB-450/NPB-450-xxNFC pin assigment

NPB-450-12 ※ Software Interface — ※ Software Interface

NPB-450-12 ※ When using the auto ranging charging curve function,… — ※ When using the auto ranging charging curve function,…

NPB-450-12 (1) Default factory setting is OFF via DC output side… — (1) Default factory setting is OFF via DC output side…

NPB-450-12 ※ Back to non-auto ranging as following — ※ Back to non-auto ranging as following

NPB-450-12 NPB-450 series — NPB-450 series

NPB-450-12 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

Datasheet1

NPB-450-12 datasheetNPB-450-SPEC.PDF · 2026-07-06 edition PDF Download

Certificates6

Mean Well NPX-450-CE-dec Certificate PDF Download

Mean Well NPX-450-UK-dec Certificate PDF Download

Mean Well NPP-NPB-450-CB(UL) Certificate PDF Download

Mean Well NPB-NPP-450-DEKRA MarK Certificate PDF Download

Mean Well NPP-NPB-450-EMC Certificate PDF Download

Mean Well NPP-NPB-450-CB Certificate PDF Download

Test reports1

Mean Well NPB-450-12 Test Report PDF Download

FAQ

What batteries is the Mean Well NPB-450-12 designed to charge?

The NPB-450-12 is suitable for both lead-acid and lithium batteries. It is built as a general-purpose intelligent charger with selectable default charging curves and 2-stage or 3-stage charging options, which helps it fit different battery types.

What are the key output specifications of the NPB-450-12?

This model has a 14.4V default boost charge voltage (13.8V float), 25A maximum charging current and 420W maximum power. Those specifications make it a higher-power 12V battery charger for applications that need substantial charging current.

What makes the NPB-450-12 different from a basic fixed-output charger?

The NPB-450-12 offers a 10.5 ~ 21V charge voltage range with an auto ranging function and built-in CANbus support, which sets it apart from simpler chargers. It also allows charging voltage, charging current, and timeout programming through the optional SBP-001, plus panel current adjustment from 50% to 100% in auto ranging mode.

Is the NPB-450-12 a good fit for industrial or commercial battery charging applications?

Yes. This charger is designed as a highly reliable intelligent unit with features such as programmable charging parameters, CANbus communication, and support for both lead-acid and lithium batteries. Those capabilities make it well suited to B2B environments where charging flexibility and control matter.

Can the NPB-450-12 operate in demanding temperature conditions?

Yes. The NPB-450-12 is rated for a wide operating temperature range of -30°C to +70°C, helping reduce environmental limitations in tougher installations. Its fan speed is controlled by internal temperature, and it includes auto-derating when over temperature.

Does the NPB-450-12 support configuration for different charging profiles?

Yes. The charger provides 4 default charging curves selectable by DIP switch, and its 2-stage or 3-stage charging behavior can also be adjusted by DIP switch. For applications needing more control, charging voltage, current, and timeout can be programmed through the SBP-001.

What certifications and warranty does the NPB-450-12 include?

The NPB-450-12 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.

Payment & Security

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Model	Power	Battery Type	Battery Voltage	Charging Current
Mean Well NPB-450-24 Battery Charger 450W 24V - Wide Charging Voltage 13.5A	450W	Lithium and Lead Acid Battery	—	—	View
Mean Well NPB-450-72-NFC Battery Charger 450W 72V - Ultra Wide Output, NFC Programmable Charging Parameters 5.5A	450W	Lithium and Lead Acid Battery	72V	—	View
Mean Well NPB-450-48-NFC Battery Charger 450W 48V - Ultra Wide Output, NFC Programmable Charging Parameters 6.8A	450W	Lithium and Lead Acid Battery	48V	—	View
Mean Well NPB-450-24-NFC Battery Charger 450W 24V - Ultra Wide Output, NFC Programmable Charging Parameters 13.5A	450W	Lithium and Lead Acid Battery	24V	—	View
Mean Well NPB-450-12-NFC Battery Charger 450W 12V - Ultra Wide Output, NFC Programmable Charging Parameters 25A	450W	Lithium and Lead Acid Battery	12V	—	View
Mean Well NPB-450-72 Battery Charger 450W 72V - Wide Charging Voltage 5.5A	450W	Lithium and Lead Acid Battery	—	—	View
Mean Well NPB-450-48 Battery Charger 450W 48V - Wide Charging Voltage 6.8A	450W	Lithium and Lead Acid Battery	—	—	View

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