Higher-output smart charging for 12V touring, marine and caravan battery banks. The Enerdrive | Dometic ePOWER 40A AC Battery Charger (EN31240) is a fully automatic multi-stage charger designed to quickly recharge and maintain up to three 12V battery banks from AC power. It is suited to Gel, AGM, Flooded and Lithium battery setups, with priority charging for Bank 1 and a clear LCD display for charge status, battery voltage, output current and fault codes.
Why it works so well in Aussie touring rigs
• 40A charging output gives faster AC recharge performance than the 20A model for larger battery banks.
• Three-bank charging lets you manage a main house bank plus two secondary banks from one charger.
• Priority charging for Bank 1 gets your main house battery bank recovered first before transitioning to the other banks.
• Lithium programmable for LiFePO₄ battery systems, along with Gel, AGM, Flooded and custom/program profiles.
• Silent mode disables the cooling fan for quiet overnight operation, ideal for caravans, campers and boats.
• LCD display shows charger status, battery voltage, output current and fault codes without needing extra gear.
• Built-in protection includes reverse polarity, over-charge, over-temperature and output short-circuit protection.
Why buy from us
- Real 12V system advice from a touring and installation-focused team
- Fast QLD dispatch from our Baringa warehouse where stock is available
- Suitable support for caravan, 4WD, canopy, boat and touring power setups
- Local backup before and after the sale
Key features
• Model: EN31240
• 12V AC battery charger with 40A maximum output current
• Fully automatic multi-stage charging: Bulk, Absorption, Float and Maintenance
• Charges up to 3 separate battery banks
• Bank 1 can be programmed with a different charge algorithm to banks 2 and 3
• Selectable battery types: Gel, AGM, Flooded, Lithium and Program
• Wide AC input: 100, 120, 220, 230 and 240 VAC nominal
• Smart charging regulates output based on connected loads
• Thermo-controlled forced-air cooling fan
• Silent mode limits output to 50% and disables the fan for up to 12 hours
• LCD display with backlight for charge status, voltage, current and fault codes
• Battery temperature sensor included
• IP32 basic drip-proof rating when installed vertically
• Complies with AS/NZS 60335.2.29 including Australian deviations
• 5-year Enerdrive warranty
What’s in the box
• Enerdrive | Dometic ePOWER 12V 40A AC Battery Charger - EN31240
• Battery temperature sensor
• IEC AC input power lead
• Owner’s manual / documentation as supplied
Tech specs quick
• SKU: EN31240
• GTIN: 9342616000250
• Output current: 40A maximum
• Charge voltage range: 14.2–15.5V
• Float voltage range: 13.4–13.8V
• Equalise voltage: 15.5V
• Charging control: Bulk / Absorption / Float / Maintenance, two-stage mode, constant power supply mode and priority bank charging
• DC output banks: 3 - one fully independent, two common with diode isolation
• Standby current: <5mA
• AC input voltage: 100, 120, 220, 230 and 240 VAC nominal
• AC input frequency: 47–63Hz
• Power consumption: 700W full load
• Charger efficiency: >82%
• Cooling: Thermo-controlled forced-air fan
• Operating range: -20°C to 60°C
• Storage range: -40°C to 70°C
• Humidity: 5–95% relative humidity, non-condensing
• Ingress protection: IP32 when installed vertically
• Unit size: 295 × 206 × 86 mm
• Unit weight: 2.6 kg
• Boxed size: 370 × 250 × 140 mm
• Boxed weight: 3.65 kg
