The Automatic-Charger Pb 1220 SMT 2B from Votronic (MPN 3101) is a modern battery charger for mobile use. It has charging programs for GEL, AGM, acid and modern lithium batteries and is designed for 12V battery voltage. The charging current at the main output is 20A. There is also a secondary charging output for the starter battery, which can supply an additional 2A charging current. The device is suitable for batteries with a capacity of 80 Ah - 145 Ah.

Important features of the Pb 1220 SMT 2B battery charger

• reliably charges GEL, AGM, acid and LiFePO4 batteries

• 20A charging current, 2A charging current at the auxiliary charging output

• Official Votronic part number: 3101

• Battery capacity (recommended): 80 Ah - 145 Ah

• Charging options: 1 supply battery and 1 starter battery

• The charging voltage is free of peaks and regulated in such a way that overcharging of the batteries is prevented.

• Fully automatic continuous operation: The charger can be permanently connected to the battery and keeps it fully charged. In the event of a power failure, the batteries are not discharged (disconnection by safety switch).

• Lithium LiFePO4 maintenance, auto wake-up, maintenance phase: Regular automatic activation of battery cell balancing every 10 days to ensure that the battery is always fully charged.

• Lead battery regeneration twice a week during long downtimes to prevent harmful acid stratification.

• Parallel and buffer operation: The battery continues to be charged or kept fully charged during simultaneous consumption. The charger automatically calculates and monitors the adjustment of the charging times.

• Monitoring-free charging: Multiple protection against overload, overheating, overvoltage, short circuit, polarity reversal, malfunction and battery back-discharge through electronic cut-off up to complete disconnection of charger and battery by built-in safety switches.

• Connection for battery temperature sensor (accessory temperature sensor 825, art. no. 2001): With lead batteries (acid, gel, AGM), the charging voltage is automatically adjusted to the battery temperature, resulting in a better full charge of the weaker battery in cold weather and avoiding unnecessary battery gassing and thus battery stress in summer temperatures.

• With LiFePO4 batteries, the battery temperature sensor is required for the function: It serves to protect the battery at high and especially at low temperatures below 0°C.

• Silent Run function: Noise-optimized operation at the touch of a button (night mode).

• Power supply unit function: Enables consumers to be supplied without a battery (e.g. battery replacement).

• Charging cable compensation: Voltage losses on the charging cables are automatically compensated for.

• Built-in on-board mains filter: Problem-free parallel operation with solar systems, wind and petrol generators, alternators etc. on one battery.

• Charging aid for deeply discharged lead batteries: Gentle pre-charging of the (lead-acid, -gel, -AGM) battery up to 8 V, then powerful support for the battery if consumers are still switched on.

• Disconnection of the batteries in the event of mains failure, overheating, malfunction (safety switch per charging output).

• Separate auxiliary charging output "S" for supporting and trickle charging the vehicle starter battery.

Overview of the charging programs of the Pb 1220 SMT 2B
"Gel": Charging program for gel batteries, characteristic curve IU1oU2oU3 Adapted to sealed, gas-tight gel/dryfit batteries with fixed electrolyte, which generally require a higher charging voltage level and longer U1 holding times in order to achieve short charging times with particularly high capacity storage and to avoid long-term battery "starvation".

"AGM": Charging program for AGM/fleece batteries, characteristic curve IU1oU2oU3 Intended for charging sealed, gas-tight AGM (Absorbent Glass Mat) batteries in 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 retention (plate and round cell technology). .

"UNIVERSAL": Charging program for lead-acid/wet/AGM batteries, characteristic curve IU1oU2oU3 Universal program for charging and charge retention of acid batteries in vehicles (mixed mobile/stationary). With a medium U1 level, still offers short charging times, a good charge factor and good acid mixing for open and closed, low-maintenance, maintenance-free standard, traction, lighting, solar and heavy-duty batteries, as well as AGM batteries with a normal U1 level.

"LiFePO4": Charging program for lithium batteries, characteristic curve IU1oU2oU3 Charging program tailored to lithium LiFePO4 batteries with their own BMS and prescribed or built-in protective circuitry. A special rest maintenance function automatically keeps the LiFePO4 battery at a charge level of 50-80% when the vehicle is parked (seasonal operation), which is beneficial for the service life, and also buffers 12 V consumers and the vehicle starter battery. In addition, a regular Auto Wake UP function activates the battery cell balancing.

Scope of delivery:

1X Votronic 3101 Pb 1220 SMT 2B battery charger
1x operating instructions (German)