Battery charger for marine applications VT-QA3000A

for electric vehiclesfor forklift trucksfor AGV

Overview
This sealed-structure series charger is suitable for flooded lead-acid, sealed lead-acid, lithium batteries (Li‑ion, LiFePO4), Ni‑MH and Ni‑Cd batteries. Typical applications include electric bumper cars, sightseeing vehicles, patrol vehicles, forklifts, floor scrubbers, AGV systems and marine battery systems.

Key product notes (short description)

• Input voltage: 100–240 VAC
• Applicable battery voltages: 48V / 60V / 72V
• Charging current options: 35A / 40A / 50A
• Applicable battery capacity ranges: 150–400 AH (varies by variant)
• Size & weight: 315 × 199 × 126 mm / 7 kg
• Waterproof level: IP65 / IP67 / IP68 (variant dependent)
• Warranty: 2 years

Protection functions

• Burnout protection: charger reduces output when internal temperature exceeds safe limit; unit stops charging if ambient temperature exceeds 65°C and resumes after cooldown.
• Reverse-connection protection: internal circuitry prevents damage if battery polarity is reversed.
• No-load protection: no output when batteries are disconnected.
• Short-circuit protection: output shuts down on short; restart only after fault clearance and restart.
• Automatic cutoff when fully charged: charger detects full state-of-charge and stops charging.

Technical parameters (from product table)

• Model: VT-QA3000A
• Shell: Aluminum
• AC input: 185–270 VAC, 45–65 Hz (also listed 100–240 VAC)
• Max efficiency: ≥93.5%
• Max input current: 14.0 A @ 220 VAC
• Dimensions: 315 × 199 × 126 mm
• Weight: 7 kg
• Waterproof rating: IP65 / IP67 / IP68 (page lists IP67)
• Noise level: ≤45 dB
• Operating temperature: -30°C to 65°C
• Storage temperature: -40°C to 95°C
• Available colors: Blue, Yellow, customizable
• Certifications: CE, FCC, ETL

Model variants — 3000W QA Series

• QA3000A-48V50A — Input: 180–240 VAC; Output nominal: 58.8 V; Charging current: 50 A; Applicable battery range: 300–400 AH; Dimensions: 315×199×126 mm; Weight: 7 kg
• QA3000A-60V35A — Input: 180–240 VAC; Output nominal: 73.5 V; Charging current: 35–40 A (table lists 40 A); Applicable battery range: 180–260 AH; Dimensions: 315×199×126 mm; Weight: 7 kg
• QA3000A-72V30A — Input: 180–240 VAC; Output nominal: 88.2 V; Charging current: 30–35 A (table lists 35 A); Applicable battery range: 150–240 AH; Dimensions: 315×199×126 mm; Weight: 7 kg

Applications & usage
The chargers are designed for cycle or float charging of battery packs used in electric amusement vehicles, material handling equipment, AGV systems and marine or industrial battery installations. Choose the variant that matches battery voltage and capacity for correct charging profile.

Specifications / Technical data

• Model: VT-QA3000A
• Nominal input voltage: 100–240 VAC (short listing) / 185–270 VAC, 45–65 Hz (table)
• Applicable battery voltages: 48V / 60V / 72V
• Charging current options: 35A / 40A / 50A (variant dependent)
• Applicable capacity ranges: 150–400 AH (variant dependent)
• Dimensions: 315 × 199 × 126 mm
• Weight: 7 kg
• Max efficiency: ≥93.5%
• Max input current: 14.0 A @ 220 VAC
• Waterproof rating: IP65 / IP67 / IP68
• Operating temp: -30°C to 65°C
• Storage temp: -40°C to 95°C
• Noise: ≤45 dB
• Shell material: Aluminum
• Colors: Blue, Yellow, customizable
• Certifications: CE, FCC, ETL
• Protections: burnout, reverse-connection, no-load, short-circuit, automatic cutoff on full charge
• Warranty: 2 years