40 A 12 V automatic multi-stage mains battery charger PB1240 from Votronic — German design for quality and reliability.

• Charging options: Charges a single 12 V battery or multiple 12 V batteries connected in parallel (batteries must be the same type, capacity and age). Two master charging sockets plus an auxiliary socket for simultaneous trickle charging of an independent battery at up to 4 A.
• Battery compatibility & parameters: Selectable charging programs for Lead‑Acid, AGM and Gel batteries. Nominal battery voltage 12 V. Acceptable capacity per Battery A (or A+B total): 75–480 Ah. Bulk/absorption: 14.4–14.7 V (depending on battery type). Float: 13.5–13.8 V.
• Safe unattended charging: Inbuilt protections against overload, overheating, overvoltage, short circuit, incorrect polarity and reverse discharge; integrated safety switch and peak‑free charging voltage for smooth, uninterrupted charging.
• Continued charging during use: The charger continues to operate at full power while energy is drawn from the battery and will maintain charge when the battery is at full capacity.
• Additional charging functions: Noise-optimised mode for quieter operation (e.g. at night); regeneration function for batteries stored in non-moving vehicles; recovery/optimised charging stage for completely drained batteries and a powerful charging stage when required.
• Compatibility with other charging sources: Thanks to the inbuilt mains suppression filter, the charger is compatible with other charging sources (e.g. shore power or parallel chargers) and helps prevent interference between sources.
• Power-pack & AC limit switch: Power-pack function supplies power to the charger output with no battery connected (e.g. during battery replacement). AC power limit switch positions — Max: 3.3 A / 680 W (short-term peak, tolerated up to 5 s); Med: 1.9 A / 390 W; Low: 1.4 A / 280 W. Max power consumption (AC): 680 W. Max current consumption (AC): 3.0 A (continuous).
• Protection & voltage limits: Charging voltage limit (protection of loads connected to the battery): 15.0 V. Automatic external high voltage disconnect: 15.5 V. LED indicators provide clear status information and the user manual is available for download (User manual for 40 A 12 V Mains battery charger PB1240).
• Environmental & physical: Nominal operating voltage (AC): 220–240 V / 45–65 Hz. Operating voltage range (AC): 170–260 V (short peaks tolerated up to 5 s). Inbuilt cooling fan for thermal management. Operating temperature range: -20°C to +40°C (-4°F to 104°F). Ambient conditions: max. 95% RH, no condensation. Protection class: IP21. Dimensions: 310 x 138 x 72 mm (12.2 x 5.4 x 2.8 in). Weight: 2.4 kg (5.3 lb).
• Warranty & documentation: This product is covered by the manufacturer's warranty; refer to the user manual (PB1240) for full terms and coverage. Supporting documents, including the user manual for the 40 A 12 V mains battery charger (PB1240), are available to download.

Designed for vehicles and boats with multiple battery banks. Permanently connectable for unattended charging — consult the user manual for installation and compatibility guidance.