📝 12V 40A AC Smart Multistage Battery Charger

Delivering precision, flexibility, and performance, the 12V 40A Smart Multistage Battery Charger is built to keep your batteries in peak condition. Ideal for RVs, caravans, boats, and off-grid setups, this intelligent charger can manage up to three battery banks simultaneously, ensuring each is optimally charged and maintained. Designed for professionals and enthusiasts alike, it provides safe, quiet, and efficient charging under any conditions.

⭐ Essential Benefits

• Multistage Charging Technology – Automatically transitions through charging stages (Bulk, Absorption, Float, and Equalize) to extend battery life and ensure full charge every time.
• Triple Bank Charging – Charges three separate battery banks independently, with bank one isolated from banks two and three for targeted power management.
• Customizable Profiles – Program unique charging algorithms for different battery banks, ideal for mixed systems or variable usage patterns.
• Adjustable Current Output – Fine-tune the output to suit your power source, making it compatible with small generators (as low as 1kVA).
• Smart Load Compensation – Automatically adjusts output to account for active loads, preventing overcharging and promoting optimal battery performance.
• Global AC Input – Universally compatible with both 110V / 60Hz and 240V / 50Hz systems for worldwide use.
• Quiet Night Mode – Engage the fan-disable function for silent charging, perfect for use in enclosed spaces or overnight operation.
• Thermal Protection – Includes a 3m temperature sensor to monitor battery temperature and maintain safe charging conditions.

⚙️ Functionality

This 12V 40A AC Charger intelligently manages up to three battery banks with precision. Bank 1 operates independently, while banks 2 and 3 share a common diode isolation—perfect for setups with start and house batteries. The charger automatically adjusts voltage and current according to the battery type and condition, while the multistage algorithm ensures long-term reliability and performance.

Its advanced microprocessor also enables smart power allocation when running from generators or shore power, ensuring efficient operation without overloading your AC supply.

🔌 Compatibility

• Compatible with AGM, Gel, Flooded, Lithium, and programmable battery types
• Suitable for caravans, RVs, boats, off-grid cabins, and utility vehicles
• Operates seamlessly with 110V / 240V AC power sources

🧰 Installation Difficulty

🟡 2/5 (Easy) – Straightforward setup for users with basic 12V wiring knowledge. Includes mounting hardware and clear terminal labelling.

🔍 Features

• 40A maximum output current
• Multistage smart charging for extended battery life
• Three DC output banks (one isolated, two common)
• Adjustable current output for generator compatibility
• Supports all major battery chemistries
• Built-in LED display with real-time feedback
• Silent operation mode for overnight use
• Comprehensive protection suite (over-voltage, over-temp, short circuit)
• Power factor correction for efficient energy use
• 5-year manufacturer warranty

📊 Specifications

📦 What’s Included

• 1 × 12V 40A Smart Battery Charger
• 1 × Battery Temperature Sensor (3m Cable)
• 1 × Mounting Hardware Kit
• 1 × User Manual