Battery charger for marine applications VT-QA300A

for forklift trucksfor AGVNi-MH

Key specifications

• AC input: 100–240 VAC, 45–65 Hz
• Supported battery voltages: 12 V / 24 V / 36 V / 48 V
• Charging current options: 5 A, 6 A, 10 A, 15 A
• Dimensions (L×W×H): 152 × 118 × 62.5 mm
• Weight: approx. 1.3–1.4 kg
• Waterproof rating: IP65 / IP67 / IP68
• Warranty: 2 years

Description
This VT-QA300A series charger features a sealed aluminum housing and multi-chemistry charging profiles. It supports flooded and sealed lead‑acid, Li‑ion, LiFePO4, Ni‑MH and Ni‑Cd batteries and is designed for both cycle charging and float/maintenance charging in industrial and transport contexts.

Protection functions

• Overtemperature protection: charging power reduces if internal temperature rises; if ambient temperature exceeds 65 ℃ charging stops and resumes after cooling.
• Reverse-connection protection: internal circuit disables output if polarity is reversed.
• No-load protection: no output when batteries are not connected.
• Short-circuit protection: output shuts down on short circuit and restarts only after fault removal and reboot.
• Automatic cutoff: charger stops charging when full charge is detected.

Technical Parameters (summary)

• Model: VT-QA300A (QA300A series) | Shell: Aluminum
• AC input: 100–240 VAC, 45–65 Hz | Max input current: 2 A @ 220 VAC
• Dimensions: 152 × 118 × 62.5 mm | Weight: ~1.3–1.4 kg
• Max efficiency: ≥ 89% | Noise: ≤ 45 dB
• Operating temperature: -30 ℃ to 65 ℃ | Storage temperature: -40 ℃ to 95 ℃
• Waterproof rating: IP65 / IP67 / IP68 (model/configuration dependent)
• Available colors: Red / Blue / Silver (custom colors on request)
• Certifications: CE, FCC, ETL

Model variants (QA300A family)

• QA300A-12V15A — Rated voltage: 12 V; Max output voltage: 17 V; Max output current: 15 A; CV (Lead Acid / Li‑ion / LiFePO4): 14.7 V / 12.6 V / 14.6 V; Transition / cut-off current: 1.5 A
• QA300A-24V10A — Rated voltage: 24 V; Max output voltage: 34 V; Max output current: 10 A; CV (Lead Acid / Li‑ion / LiFePO4): 29.4 V / 29.4 V / 29.2 V; Transition / cut-off current: 1.0 A
• QA300A-36V06A — Rated voltage: 36 V; Max output voltage: 48 V; Max output current: 6 A; CV (Lead Acid / Li‑ion / LiFePO4): 44.1 V / 42.0 V / 43.8 V; Transition / cut-off current: 1.0 A
• QA300A-48V05A — Rated voltage: 48 V; Max output voltage: 66 V; Max output current: 5 A; CV (Lead Acid / Li‑ion / LiFePO4): 58.8 V / 54.6 V / 58.4 V; Transition / cut-off current: 1.0 A

Applications

• Electric bumper cars, sightseeing vehicles, patrol vehicles
• Forklifts, floor scrubbers, automated guided vehicles (AGVs)
• Marine battery systems (ships) and other sealed-environment charging applications

Technical features

• Multi-chemistry charging algorithms with CV/Cut-off adapted per battery type
• Sealed aluminum shell with IP65–IP68 options for harsh environments
• Compact dimensions and low noise for vehicle and onboard installations
• Built-in protections: overtemperature, reverse polarity, no-load, short-circuit, automatic cutoff