Compact 40 A 12 V intelligent mains charger offering automatic 7‑stage charging for safe, unattended charging of 12 V battery banks from 220–240 V AC mains.

• Compatibility: Designed for lead‑acid batteries including AGM, Gel and Wet cell. Charges a single 12 V battery or multiple 12 V batteries in parallel (batteries must be same type, capacity and age).
• Safe unattended charging: Inbuilt safety functions protect against DC short circuit, overheating, overcharging and reverse polarity; low‑ripple charging voltage for smooth, uninterrupted charging.
• Continued charging during use: Charger maintains charge while energy is drawn from the battery and will maintain full charge automatically.
• Boost‑charging & dead battery recovery: A preliminary boost stage can improve battery condition and help recover lost capacity from older batteries; a desulphation stage breaks down sulphation in batteries left flat for extended periods.
• Automatic temperature control: Inbuilt fan engages automatically when high temperature or charging current is detected to maintain optimal internal temperature.
• LCD display & power‑pack function: LCD shows charging voltage, charging current and charging stage; LEDs indicate battery type. Power‑pack mode can supply a direct 12 V load (for example a 12 V fridge) without a battery connected.
• Specifications: Operating voltage (AC) 190–265 V (full capacity), 50 Hz; DC output current 40 A; DC output voltage 12 V; suggested battery capacity 40–300 Ah; Bulk/absorption charging voltage 14.2–14.8 V DC (depending on battery type); Float charging voltage 13.2–13.8 V DC (depending on battery type); Efficiency <88%.
• Physical & warranty: Operating temperature range 0°C–40°C (32°F–104°F); dimensions 226 x 175 x 95 mm (8.9 x 6.9 x 3.7 in); weight 2.4 kg (5.3 lb). Inbuilt isolated DC output and fan. This product is covered by a 1 year manufacturer warranty. User manual available for BC1240.

Suitable for marine and leisure applications; always follow the user manual for installation, battery matching and safety guidance.