Marine battery charger VT-QA1250A

for electric vehiclesfor forklift trucksfor AGV

Overview
This QA series sealed-structure charger supports flooded lead-acid, sealed lead-acid, LiFePO4 and Ni-MH/Ni-Cd batteries. It is designed for cycle or float charging of battery packs used in electric carts, sightseeing vehicles, patrol vehicles, forklifts, floor scrubbers, AGVs and marine applications.

Short specifications

• Input voltage: 100–240VAC
• Applicable battery voltages: DC24V / 36V / 48V / 60V / 72V
• Charging current options: 12A, 15A, 25A, 30A (model dependent); extended range in QA series: up to 50A
• Applicable battery capacity ranges: ~40AH to ~400AH depending on model
• Example dimensions (VT-QA1250A): 231.9×136.5×76mm
• Example weight (VT-QA1250A): 2.8kg
• Enclosure material: aluminum
• Waterproof rating: IP65 / IP67 / IP68 (many models IP67)
• Warranty: 2 years

Protection functions

• Over-temperature/burnout protection: charger reduces output or stops when internal or ambient temperature exceeds limits; above 65°C the unit stops charging and returns to standby after cooling
• Reverse-connection protection: internal circuitry disables output if batteries are connected with reversed polarity
• No-load protection: no output when batteries are not connected
• Short-circuit protection: charger shuts down on short; restart only after fault clearance and power cycle
• Automatic shutdown when full charge detected by charger algorithm

Technical Parameters (excerpt)
Model: VT-QA1250A
Shell: Aluminum
AC input: 185–270VAC, 45–65Hz
Max efficiency: ≥93.0%
Waterproof: IP67 (models vary: IP65/IP67/IP68)
Max input current: 7.5A @ 220VAC
Noise: ≤45dB
Operating temperature: -30°C ~ 65°C
Dimensions (example): 231.9×136.5×76mm
Weight (example): 2.8kg
Available color: Red (other colors customizable)
Storage temperature: -40°C ~ 95°C
Certifications: CE, FCC, ETL
Protections: over-temperature, reverse connection, no-load, short circuit, automatic full-charge shutdown

Model list (examples)
450W QA Series (Waterproof)
QA450A-12V15A — 12V, 15A — Applicable range: 90–120AH — Output voltage: 14.7V
QA450A-24V12A — 24V, 12A — Applicable range: 90–120AH — Output voltage: 29.4V
QA450A-24V15A — 24V, 15A — Applicable range: 90–120AH — Output voltage: 29.4V
QA450A-36V10A — 36V, 10A — Applicable range: 60–80AH — Output voltage: 44.1V
QA450A-48V06A — 48V, 6A — Applicable range: 48–64AH — Output voltage: 58.8V

600W QA Series (Waterproof)
QA600A-12V30A — 12V, 20–30A — Applicable range: 180–240AH — Output voltage: 14.7V
QA600A-24V15A — 24V, 15–20A — Applicable range: 120–160AH — Output voltage: 29.4V
QA600A-36V15A — 36V, 12A — Applicable range: 90–120AH — Output voltage: 44.1V
QA600A-48V10A — 48V, 10A — Applicable range: 60–80AH — Output voltage: 58.8V
QA600A-60V08A — 60V, 8A — Applicable range: 40–60AH — Output voltage: 73.5V

750W QA Series (Waterproof)
QA750A-24V25A — 24V, 25A — Applicable range: 150–200AH — Output voltage: 29.4V
QA750A-36V18A — 36V, 18A — Applicable range: 120–160AH — Output voltage: 44.1V
QA750A-48V15A — 48V, 15A — Applicable range: 80–120AH — Output voltage: 58.8V

1250A QA Series (Waterproof)
QA1250A-24V30A — 24V, 30A — Applicable range: 180–240AH — Dimensions: 231.9×136.5×76mm — Weight: 2.8kg — Output voltage: 29.4V
QA1250A-36V25A — 36V, 25A — Applicable range: 150–200AH — Output voltage: 44.1V
QA1250A-48V25A — 48V, 25A — Applicable range: 120–150AH — Output voltage: 58.8V
QA1250A-60V15A — 60V, 15A — Applicable range: 80–120AH — Output voltage: 73.5V
QA1250A-72V12A — 72V, 12A — Applicable range: 60–80AH — Output voltage: 84.0V

2000W QA Series (Waterproof)
QA2000A-24V40A — 24V, 40A — Applicable range: 240–350AH — Output voltage: 29.4V — Optional CAN communication, 12V/3A output
QA2000A-24V50A — 24V, 50A — Applicable range: 300–400AH — Output voltage: 29.4V
QA2000A-36V40A — 36V, 40A — Applicable range: 180–260AH — Output voltage: 44.1V
QA2000A-48V30A — 48V, 35A — Applicable range: 180–260AH — Output voltage: 58.8V
QA2000A-60V25A — 60V, 30A — Applicable range: 150–240AH — Output voltage: 73.5V
QA2000A-72V25A — 72V, 25A — Applicable range: 150–200AH — Output voltage: 88.2V

3000W QA Series (Waterproof)
QA3000A-48V50A — 48V, 50A — Applicable range: 300–400AH — Dimensions: 315×199×126mm — Weight: 7kg — Output voltage: 58.8V — Optional CAN communication, 12V/3A output
QA3000A-60V35A — 60V, 40A — Applicable range: 180–260AH — Output voltage: 73.5V
QA3000A-72V30A — 72V, 35A — Applicable range: 150–240AH — Output voltage: 88.2V

Key features / technical specifications

• Wide AC input: 100–240VAC (operational 185–270VAC; 45–65Hz)
• High efficiency: ≥93.0%
• Robust waterproof options: IP65/IP67/IP68
• Low noise: ≤45dB
• Wide operating temperature: -30°C to 65°C; storage: -40°C to 95°C
• Multiple protections and 2-year warranty