Battery charger for marine applications VT-QA450A

for electric vehiclesfor forklift trucksfor AGV

Overview
This VT-QA450A series charger is a sealed, waterproof AC-to-DC charger designed for lead-acid (flooded and sealed), Lithium, Ni-MH and Ni-Cd battery packs. It supports cycle and float charging for industrial electric vehicles and equipment where IP-rated protection and wide operating temperature are required.

Key specifications

• AC input: 100–240VAC (technical table: 185–270VAC, 45–65Hz)
• Output battery voltages: 12V / 24V / 36V / 48V
• Charging current options: 06A / 10A / 12A / 15A
• Applicable battery capacity ranges: 48–64AH, 60–80AH, 90–120AH (model dependent)
• Rated power: 450W
• Dimensions & weight: 183 × 108 × 70 mm; 1.7 kg
• Waterproof rating options: IP65 / IP67 / IP68

Protection functions

• Overtemperature protection: reduces output or stops charging when internal temperature exceeds safe limits; unit resumes when temperature falls
• Reverse-connection protection: internal shutdown to prevent damage if battery polarity is reversed
• No-load protection: no output when battery disconnected
• Short-circuit protection: automatic shutdown on short; requires troubleshooting and restart
• Automatic charge termination when battery fully charged

Technical Parameters
Model: VT-QA450A
Shell: Aluminum
Max efficiency: ≥92.0%
Max input current: 3.0A @ 220VAC
Noise: ≤45 dB
Operating temperature: -30°C to 65°C
Storage temperature: -40°C to 95°C
Available colors: Yellow, silver, customizable
Warranty: 2 years

Model list (QA450A series examples)
QA450A-12V15A — 12V, 15A; applicable battery range: 90–120AH; output voltage: 14.7V
QA450A-24V12A — 24V, 12A; applicable battery range: 90–120AH; output voltage: 29.4V
QA450A-24V15A — 24V, 15A; applicable battery range: 90–120AH; output voltage: 29.4V
QA450A-36V10A — 36V, 10A; applicable battery range: 60–80AH; output voltage: 44.1V
QA450A-48V06A — 48V, 06A; applicable battery range: 48–64AH; output voltage: 58.8V

Applications

• Cycle or float charge battery packs for electric bumper cars, sightseeing vehicles, patrol vehicles, forklifts, floor scrubbers, AGV, ships and similar industrial or commercial electric equipment

Specifications

• Commercial model: VT-QA450A
• AC input (nominal): 100–240VAC; (technical table) 185–270VAC, 45–65Hz
• Supported battery voltages: 12V / 24V / 36V / 48V
• Charging current options: 06A / 10A / 12A / 15A
• Applicable battery capacity: 48–64AH / 60–80AH / 90–120AH
• Dimensions: 183 × 108 × 70 mm
• Weight: 1.7 kg
• Shell material: Aluminum
• Max efficiency: ≥92.0%
• Waterproof rating: IP65 / IP67 / IP68
• Noise: ≤45 dB
• Operating temperature: -30°C to 65°C
• Storage temperature: -40°C to 95°C
• Available colours: Yellow, silver, customizable
• Protections: overtemperature, reverse-connection, no-load, short-circuit, automatic shutdown when fully charged
• Warranty: 2 years