Votronic 20A-12V Battery Charger Pb 1220 SMT 2B - 3101

Votronic 20A-12V Battery Charger PB1220 SMT2B for lead-acid and lithium batteries

Designed for high-quality motorhomes, marine applications, special vehicles and self-sufficient applications.

Votronic chargers are characterized by high operational reliability and high operational readiness, thus representing the latest technology. Their high-quality charging technology, robust power electronics, and intelligent microprocessor control ensure precise compliance with charging voltages, currents, and times, thus ensuring a long battery life. A wide variety of different versions of the devices are available, ensuring that you can find the right charger for your application.

Votronic charging technology has been used for years in professional emergency vehicles such as fire departments, ambulances, and coast guard vehicles! Quality Made in Germany!

All charging programs are applied by the charger for a gentle full charge and then for maintenance of the battery charge. When a temperature sensor is used, temperature compensation is also adjusted to suit the battery type. The power supply to connected loads is also taken over during charging, dimensioned so that no more than 50% of the current flows to the loads during the I phase (initial charge).

When the batteries are full, almost the entire possible device charging current is available for the consumers without the batteries being discharged.

Further special features at a glance:

• 15A main charge / 2A secondary charge
• Charging programs Gel, AGM, Acid, LiFePO4 (No. 1, 2, 4 and Li ) adjustable to battery type
• Excellent charging technology
• Silent Run function adjustable (night reduction)
• Disconnection of batteries in case of power failure, overheating, malfunction
• The charging voltages are free of peaks, thus overcharging is excluded
• Fully automatic continuous operation for constant battery readiness
• Separate auxiliary charging output “S” for supporting and maintaining the vehicle starter battery, max. 2A
• Automatic battery regeneration during long periods of inactivity (twice a week)
• Compensation of voltage losses on the charging cables for precise compliance with charging voltages
• Built-in on-board power supply filter: Trouble-free parallel operation with solar systems, generators, alternators, etc. on one battery.
• Intelligent microprocessor control takes into account the simultaneous supply of consumers to the battery
• Precise battery temperature compensation (temperature sensor required)
• Power supply function: Allows the supply of consumers without a battery (e.g. battery replacement)

Selectable charging programs / charging characteristics:

“LiFePO4”: Charging program specifically for lithium batteries

Charging program tailored to lithium LiFePO4 batteries with its own BMS and required or built-in protective circuitry. A special sleep maintenance function automatically maintains the LiFePO4 battery at a lifespan-promoting charge level of 50-80% when the vehicle is parked (seasonal use), while also buffering 12 V consumers and the vehicle's starter battery. In addition, a regular auto-wake-up function activates battery cell balancing.

1. “Gel”: Charging program for gel batteries, characteristic curve IU1oU2oU3

Designed for sealed, gas-tight gel/dryfit batteries with fixed electrolyte, which generally require a higher charging voltage level and longer U1 holding times to achieve short charging times with particularly high capacity storage and prevent long-term battery starvation. Perfectly suited for our WATTSTUNDE gel batteries, among others.

2. “AGM”: Charging program for AGM / fleece batteries, characteristic curve IU1oU2oU3

Intended for charging sealed, gas-tight AGM (Absorbent Glass Mat) batteries and those using lead-fleece technology, which require a particularly high U1 level with coordinated holding times for full charging and then a moderate U2 level for charge maintenance (round cell and plate technology).

4. “UNIVERSAL”: Charging program for lead-acid/wet batteries, characteristic curve IU1oU2oU3

Universal program for charging and maintaining the charge of acid batteries in vehicles (mixed mobile/stationary). With a medium U1 level, it still offers short charging times, a good charge factor, and good acid mixing for open and sealed, low-maintenance, maintenance-free standard, traction, lighting, solar, and heavy-duty batteries, as well as AGM batteries with a normal U1 level.

Technical data :