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Mean Well NPP-450-24 453.6W 24V Battery Charge& Power Supply 2-in-1, Selectable via Jumper 13.5A

Name: Mean Well NPP-450-24 453.6W 24V Battery Charge& Power Supply 2-in-1, Selectable via Jumper 13.5A
Brand: Mean Well
SKU: NPP-450-24
Price: 113.14 USD
Availability: InStock

can switch between charger and power supply3 stage chargingonly suitable for lead-acid batteriescharging voltage/current adjustable through panel

SKU NPP-450-24

$113.14 USD

Shipping calculated at checkout.

Available to order

Overview

NPP-450-24 is the 28.8V output model of this series: rated current 13.5A, rated power 453.6W, typical efficiency 93%.

NPP-450 is a miniaturized dual-purpose charger and power supply. In addition to being used as a three-stage charger for lead-acid batteries, it can also be used as a constant voltage output power supply to drive general load. The operating mode can be quickly switched by plugging or unplugging a connector on the front panel. Other features include: ultra-wide voltage output, adjustable voltage via VR on the panel (10.5~21V, 21~42V, 42~80V, 54~100V), adjustable charging current (50~100%), built-in intelligent fan with variable speed based on temperature to reduce noise and extend fan lifetime, -30~+70℃ wide operating temperature, suitability for use in different environments, built-in remote ON/OFF control, compliance to IEC/EN/UL62368-1 and household EN60335-1/-2-29 dual safety, multiple built-in protections, and 3-year warranty. The NPP-450 is truly an intelligent, safe, and reliable universal dual-purpose charger and power supply with outstanding cost performance.

Features

Multi-function single unit battery charger or power supply operation modes selectable
Output voltage and current adjustable via potentiometer
3-stage charging curve for charging mode
-30~+70℃ wide operating temperature
Multiple protections: Short circuit / Over load / Over voltage / Over temperature
Thermal controlled DC fan for noise reduction
Remote ON-OFF control
Comply with 62368-1+60335-1/-2-29 dual certification
Suitable for lead-acid (Pb) batteries
Carry handle accessory available (Order NO.:Carry handle, sold separately)
3 years warranty

Specifications

NPP-450-24Specifications from the official datasheet (2026-07-06 edition)

OUTPUT (Battery Charger mode, default)

BOOST CHARGE VOLTAGE(Vboost)(default): 28.8V
FLOAT CHARGE VOLTAGE(Vfloat)(default): 27.6V
VOLTAGE ADJUSTABLE RANGE^{By built-in potentionmeter}: 21 ~ 42V
MAX. OUTPUT CURRENT(CC): 13.5A
CURRENT ADJUSTABLE RANGE^{By built-in potentionmeter. Note.3: Float charge voltage(Vfloat) adjustable via potentiometer in battery charger mode.}: 6.75 ~ 13.5A
MAX. POWER: 453.6W
RECOMMENDED BATTERY CAPACITY (AMP HOURS)^{Note.4: This is MEAN WELL's suggested range. Please consult your battery manufacturer for their suggestions about maximum charging current limitation.}: 45 ~ 155AH

PROTECTION (Battery Charger mode, default)

SHORT CIRCUIT^{Note.7: This protection mechanism is specified for the case the short circuit occurs after the charger is turned on.}: Protection type : Constant current limiting, charger will shutdown after 5 sec, re-power on to recover
OVER VOLTAGE: 43 ~ 52V Protection type : Shut down and latch off o/p voltage, re-power on to recover
OVER TEMPERATURE: Shut down O/P voltage, recovers automatically after temperature goes down

FUNCTION (Battery Charger mode, default)

CHARGING STAGE: 3 stage only
CHARGER OK SIGNAL: 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: Open : Charger stop charging Short : Charger normal work
FAN SPEED CONTROL: Depends on internal temperature

OUTPUT (Power Supply mode)

DC VOLTAGE: 28.8V
VOLTAGE ADJUSTABLE RANGE^{By built-in potentionmeter}: 21 ~ 42V
CURRENT ADJUSTABLE RANGE: 6.75 ~ 13.5A
RATED CURRENT: 13.5A
RATED POWER: 453.6W
RIPPLE & NOISE(max.): 300mVp-p
VOLTAGE TOLERANCE: ±1.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±1.0%
SETUP, RISE TIME: 1800ms, 60ms/230VAC at full load
HOLD UP TIME (Typ.): 16ms/230VAC at 75% load 10ms/230VAC at full load

PROTECTION (Power Supply mode)

OVERLOAD: 105 ~ 115% rated output power Protection type : Constant current limiting, unit will shutdown after 5 sec, re-power on to recover
SHORT CURRENT: Protection type : Constant current limiting, unit will shutdown after 5 sec, re-power on to recover
OVER VOLTAGE: 43 ~ 52V Protection type : Shut down and latch off o/p voltage, re-power on to recover
OVER TEMPERATURE: Shut down O/P voltage, recovers automatically after temperature goes down

FUNCTION (Power Supply mode)

REMOTE CONTROL: Open : Power OFF Short : Power ON
DC OK: The TTL signal out, DC OK = H(4.5 ~ 5.5V) ; Power supply failure or protection = L(-0.5 ~ +0.5V)
FAN SPEED CONTROL: Depends on internal temperature

INPUT

VOLTAGE RANGE^{Derating may be needed under low input voltages. Please check the derating curve for more details. (Note.3 in Power Supply mode, Note.5 in Battery Charger mode)}: 90 ~ 264VAC 127 ~ 370VDC
FREQUENCY RANGE: 47 ~ 63Hz
POWER FACTOR (Typ.): PF>0.98/115VAC, PF>0.95/230VAC at full load
EFFICIENCY (Typ.)^{Battery Charger mode Note.6: 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).}: 93%
AC CURRENT (Typ.): 4.5A/115VAC 2.2A/230VAC
INRUSH CURRENT (Typ.): COLD START 50A at 230VAC

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

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: Parameter Standard Test Level

Conducted BS EN/EN55032 (CISPR32),BS EN/EN55014-1 Class B
Radiated BS EN/EN55032 (CISPR32),BS EN/EN55014-1 Class B
Harmonic Current BS EN/EN61000-3-2 Class A
Voltage Flicker BS EN/EN61000-3-3
EMC IMMUNITY^{Note 4 (Power Supply mode) / Note 8 (Battery Charger mode)}: BS EN/EN61000-6-2, J55032(H29)

Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 3, 8KV air; Level 2, 4KV contact
Radiated BS EN/EN61000-4-3 Level 2, 3V/m
EFT / Burst BS EN/EN61000-4-4 Level 2, 1KV
Surge BS EN/EN61000-4-5 Level 2, 1KV/Line-Line,Level 3, 2KV/Line-Earth
Conducted BS EN/EN61000-4-6 Level 2, 3Vrms
Magnetic Field BS EN/EN61000-4-8 Level 1, 1A/m
Voltage Dips and Interruptions BS EN/EN61000-4-11 >95% dip 0.5 periods, 30% dip 25 periods, >95% interruptions 250 periods

Parameter	Standard	Test Level
Conducted	BS EN/EN55032 (CISPR32),BS EN/EN55014-1	Class B
Radiated	BS EN/EN55032 (CISPR32),BS EN/EN55014-1	Class B
Harmonic Current	BS EN/EN61000-3-2	Class A
Voltage Flicker	BS EN/EN61000-3-3

Parameter	Standard	Test Level
ESD	BS EN/EN61000-4-2	Level 3, 8KV air; Level 2, 4KV contact
Radiated	BS EN/EN61000-4-3	Level 2, 3V/m
EFT / Burst	BS EN/EN61000-4-4	Level 2, 1KV
Surge	BS EN/EN61000-4-5	Level 2, 1KV/Line-Line,Level 3, 2KV/Line-Earth
Conducted	BS EN/EN61000-4-6	Level 2, 3Vrms
Magnetic Field	BS EN/EN61000-4-8	Level 1, 1A/m
Voltage Dips and Interruptions	BS EN/EN61000-4-11	>95% dip 0.5 periods, 30% dip 25 periods, >95% interruptions 250 periods

OTHERS

MTBF: 1056.9K hrs min. Telcordia SR-332 (Bellcore) ; 118.5K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 205*135*55mm (L*W*H)
PACKING: 1.38Kg; 8pcs/ 12.05Kg / 1.71CUFT

Test conditions and notes5

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. Derating may be needed under low input voltages. Please check the derating curve for more details.
4. The PSU is considered a component which will be installed into a final equipment. All the EMC tests are been executed by mounting the unit on a 600mm*900mm metal plate with 1mm of thickness. 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 )
5. 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

NPP-450-24 Block Diagram — Block Diagram

NPP-450-24 Derating Curve — Derating Curve

NPP-450-24 Function Manual — Function Manual

NPP-450-24 Jumper(Pin 7 & 8) — Jumper(Pin 7 & 8)

NPP-450-24 3.Charger OK / DC OK Signal — 3.Charger OK / DC OK Signal

NPP-450-24 4.Remote ON-OFF Control — 4.Remote ON-OFF Control

NPP-450-24 Mechanical Specification — Mechanical Specification

NPP-450-24 Accessory List — Accessory List

NPP-450-24 ※ Carry handle (Optional accessory, battery charger and… — ※ Carry handle (Optional accessory, battery charger and…

Typical applications

Radio system backup solution
Electric scooter charger
Camping car、Buses、Heavy duty truck、Specialty vehicles
Surveillance system
Industrial automation machinery
Industrial control system
Mechanical and electrical equipment

Downloads

Catalogues1

Mean Well Catalog (Industrial) PDF Download

FAQ

What is the Mean Well NPP-450-24 designed for?

The NPP-450-24 is a 2-in-1 unit that can operate as either a battery charger or a power supply, depending on the mode selected via a jumper. It is aimed at commercial and industrial applications that need a high-power 24V-class solution. Typical use cases for this series include mobility equipment, robots, floor scrubbers, and control or security systems.

What are the main electrical ratings of the NPP-450-24?

This model is rated at 450W class output, with a listed power rating of 453.6W. The product data lists a 28.8V output voltage and 13.5A rated current. Those specs make it suitable for buyers looking for a higher-power charger or supply in this voltage class.

Can the NPP-450-24 be used as both a charger and a power supply?

Yes. One of the main differentiators of the NPP-450-24 is that it supports both battery charging mode and power supply mode in a single product. That can reduce the need to source separate units when an application may require either charging capability or stable DC power output.

What battery type is this model suitable for?

The datasheet specifically states that the NPP-450-24 is suitable for lead-acid batteries (flooded, Gel and AGM). It also features a 3-stage charging curve for charging mode. If your project uses a different battery chemistry, you should verify fit before purchase rather than assuming compatibility.

Is the NPP-450-24 suitable for harsh or variable environments?

Yes, this model is built for demanding operating conditions, with a specified temperature range from -30°C to +70°C (derating applies at higher temperatures per the derating curve). It also includes a cooling fan whose speed depends on internal temperature to support thermal management. That makes it a practical choice for industrial or equipment-based environments where ambient conditions can vary widely.

What protection and certification features does the NPP-450-24 include?

The NPP-450-24 includes built-in protection for short circuit, overload, over voltage, and over temperature conditions. The datasheet also lists approvals including CB, UL, DEKRA, and EAC, with compliance to IEC/EN/UL 62368-1 and IEC/EN60335-1/2-29 standards.

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Model	Power	Battery Type	Battery Voltage	Charging Current
Mean Well NPP-450-72 462W 72V Battery Charge& Power Supply 2-in-1, Selectable via Jumper 5.5A	462W	Lithium and Lead Acid Battery	—	—	View
Mean Well NPP-450-48 456.96W 48V Battery Charge& Power Supply 2-in-1, Selectable via Jumper 6.8A	457W	Lithium and Lead Acid Battery	—	—	View
Mean Well NPP-450-12 420W 12V Battery Charge& Power Supply 2-in-1, Selectable via Jumper 25A	420W	Lithium and Lead Acid Battery	—	—	View

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