Automatic Charger VAC 1250 M 3A

Article-No. 0427

   Blaulicht  Offroad



Charging Programs:

1  2  3  5  Li

Technical Features:

BR  DC  Equ  FB  Kap  LV

PL  SR  TK  TS  VF  Tropfen

Charging Options:

Batterien 2S

1 to 2 Supply Batteries or
1 to 2 Starter Batteries or
1 Supply Battery and 1 Starter Battery



  • Charging programs No. 1, 2, 3, 5 (gel, AGM, acid, start) and LiFePO4 adjustable to the battery type
  • Outstanding charging technology
  • The charging voltage is exempt from peaks, and it is controlled in such a way, that overcharging is excluded
  • Integrated charging current distributor with 2 main charging ports, each with max. current and output capacity
  • For mixed operation with 1 supply and 1 starter battery, a separate starter charging program can be adjusted at the built-in charging current distributor
  • If required, the starter battery can also be charged with full charging current (short stop period of the vehicle)
  • Additional auxiliary charging port "S" for support charging and trickle charge of a further starter battery (max. 4 A) or as signalling port +86 for motor locking while the vehicle is connected to mains
  • All-automatic continuous operation for permanent readiness for use of the vehicle
  • Lithium LiFePO4 Auto Wake Up: Periodical automatic activation of the battery cell balancing BMS
  • Precise battery temperature compensation, temperature sensor(s) is (are) included in the standard delivery
    For LiFePO4 batteries, the battery temperature sensor is required: It serves for battery protection in case of high temperatures or particularly in case of low temperatures below 0 °C
  • Equalization function (the characteristic line IUIU can be activated manually for compensation charging of the cells)
  • Intelligent microprocessor control observing the simultaneous supply of consumers
  • Battery regeneration in case of extended stop periods twice a week
  • Compensation of the voltage loss on the charging cables ensuring exact observation of the charging voltage rates
  • Separation of the batteries in case of power failure, overheating, incorrect behaviour (safety relay for each charging port)
  • Adjustable silent run function (reduction at night)
  • Power pack function allows continued operation of the consumers and preservation of data, such as in case of battery replacement
  • The electronic system is protected against humidity
  • Variable fitting position
  • 4 Battery capacity rates can be adjusted (16 charging programs in total)
  • 2 inputs, each, for sensor (sense) lines and battery temperature sensors
  • The mains/charging capacity can be reduced in case of low capacity or restricted power supply, such as in case of weakly protected country current supply , generator operation etc. (power limit function)

Technical Details

 Supply Voltage (Mains Frequency 45 - 65 Hz) AC 110 V - 230 V
 Voltage Range Mains Function 85 V - 270 V,   short-time 305 V (5 sec.)
 Mains Voltage Range for Full Charging Capacity 190 V - 270 V
 Mains Power Consumption max. 840 W
  Mains Current Draw (AC) max. 5.2 A
 Active Sinusoidal Power Factor Correction (CosPhi < = 1) yes
 Approx. Charging Current at 110 V Supply Voltage 33 A
 Switch "AC Power Limit", Limitation of the Mains Current Draw / Capacity:
 Position "Max" (Maximum Charging Capacity): 5.2 A / 840 W
 Position "Med" (Reduced Mains and Charging Capacity): 1.9 A / 390 W
 Position "Low" (Reduced Mains and Charging Capacity): 1.4 A / 280 W
 Charging Ports Batteries "A" and "B":
 Nominal Battery Voltage Lead/LiFePO4 Battery 12 V / 12 V-13.3 V
 Battery Capacity adjustable (A or A+B total) 88Ah - 550Ah
 Charging Current Phase I (A, B or A+B) max. 50 A
 Charging/Floating/Load Current, controlled, Phase U1, U2, U3 0 A - 50 A
 Automatic Charging Current Distributor Batteries A/B yes
 Minimum Battery Voltage for Charging Start 0 V
 Preliminary Charging Current, Deeply Discharged Batt. 0 V-8 V 25 A
 Reverse Current from Battery (Power Failure) < 0.2 mA
 Reset Voltage (30 sec.), depending on Battery Type 12.75 V / 13.25 V
 Limit of Charging Voltage (Protection of Connected Consumers) 15.0 V
 External Overvoltage Disconnection (20 sec.) 15.5 V
 Ripple Factor Voltage < 40 mV rms
 Charging Timer 4-fold
 Safety Protect. ag. Reverse Batt./Short Circuit/Back Discharge yes
 Safety Timer per Charging Phase I/U1/U2 yes
 Sensor Lines "Sense" Inputs, for Battery "-" and "+A",  "+B" yes
 Lead Battery Regeneration at extended down-time 2x week: 1 h yes
 LiFePO4-Auto Wake Up in case of extended down-time every 10 days/0.5 h yes
 or LiFePO4 Lithium Standstill Trickle Charge (Seasonal Operation yes
 Manual Lead-Acid Equalization of the Charge, Equalization, Charging Current 3.5/4.8/7.0/11.6A
 Equalization, Limitation of Charging Voltage/Charging Time max. 16.0 V / 1.5 h
 Main Charging Port Battery "A" (Master):
 Selectable Charging Programs Lead-Gel/AGM/Acid, LiFePO4 8
 Charging/Floating/Load Current, controlled, Phase IU1oU2oU3 0 A - 50 A
 Input for Battery Temperature Sensor: "A" yes
 Power Pack Operation (e. g. Supply During Battery Replacement) yes
  2. Charging Port Battery "B"(Integrated Charging Current Distributor, switchable):
 4 Charging Programs, Optionally Identically with Battery "A" Master yes
 or Charging Program for Vehicle (Lead) Starter Battery yes
 Charging/Floating/Load Current, controlled, Phase IU1oU2oU3 0 A - 50 A
 Input for Battery Temperature Sensor "B" yes
 Power Pack Operation (e. g. Supply During Battery Replacement) yes
 3. Auxiliary Charging Port "C" (Signalling Port Mains)
 Nominal Battery Voltage (Lead) 12 V
 Charging Current or Rating as Signalling Port 0 A - 2 A
 Safety Protect. ag. Overcharg./Reverse Batt./Short Circuit/Back Discharge yes
 Connection for Remote Control Automatic Charger yes
 Fitting Position of Unit any
 Temperature Range -20/+45°C
 Speed-controlled, Temperature-controlled Fan yes
 Gradual Reduction of Charging Capacity at Overtemperature yes
 Safety Disconnection in Case of Overheating yes
 Noise-reduction of Fan, Night Operation (Silent Run) yes
 Protection Class/System of Protection I / IP21
 Dimensions, incl. mounting flanges (W/H/D) 160 x 72 x 305 mm
 Weight 2450 g
 Ambient Conditions, Humidity of Air max. 95 % RH, no condensation
 Safety Regulations EN 60335-2-29
Delivery Scope: Mains supply cable, 2 Temperature Sensors, Operating Manual

Charging Programs

1 „Gel“: Charging Program for Gel Batteries, Characteristic Line IU1oU2oU3
Adapted to closed, gas-tight gel/dryfit batteries with determined electrolyte, which are generally requiring a higher charging voltage level and longer dwell times U1 to achieve short charging times with particularly high capacity storage and to avoid total discharge. Also recommended for EXIDE MAXXIMA a high-current battery in AGM filament technology.

2 „AGM“: Charging Program for AGM/Fleece Batteries, Characteristic Line IU1oU2oU3
Adapted to charging closed, gas-tight AGM (absorbed glass mat) batteries and batteries in lead-fleece technology requiring a particularly high level U1 with adapted dwell times for full charging and after that a moderate level U2 for trickle charge (round cell and plate technology).

3 "DIN 0510“: Charging Program for Lead, Acid/Lead-Acid Batteries, Characteristic Line IU1oU2oU3
General characteristic line DIN for charging and conservation to charge of open and closed lead storage batteries with removable cell plugs and possibility of acid level control and acid level correction (maintenance). Also suitable for recently developed, closed battery types (low-antimonous, with lead-silver alloy, calcium etc.) with low and very low water consumption.
Allows short charging times with high level U1, high charging factor and high acid mixing, even during stationary application (acid accumulation) of "wet" drive, lighting, solar, heavy duty and standard batteries.

5 „MOTOR“: Charging Program for Lead, Acid/Lead-Acid Batteries, Characteristic Line IU1oU2oU3
Characteristic line similar to dynamo/generator for mobile application (acid accumulation) with particularly low maintenance (battery gassing, water consumption). Charging and conservation of charge of starter batteries in intervention vehicles, according to a customary suggestion of the Standard Committee Fire Protection (FNFW). For conventional, standard starter batteries, starter batteries being "absolutely maintenance-free", "maintenance-free according to EN", "maintenance-free according to DIN", "maintenance-free", "lowmaintenance".

Li „LiFePO4“: Charging Program for Lithium Batteries, Characteristic Line IU1oU2oU3
Charging program for lithium LiFePO4 batteries with completely integrated electronic system and safety circiut (BMS). Automatic trickle charging of the LiFePO4 battery when the vehicle is stopped (seasonal operation) to maintain a charging state of 50‐80 %, which is advantageous for the battery lifetime. Powers also 12 V consumer loads, such as alarm systems, WLAN etc., as well as the vehicle's starter battery. With periodical automatic activation of the battery cell balancing BMS (Auto Wake Up Function).

Technical Features

BR Automatic battery regeneration   DC Power pack function (battery replacement)
Equ Equalization function
(compensation charging of the cells)
  FB Connection remote control / remote indicator
Kap Battery capacity (size) adjustable   LV Charging current distributor
for one or several batteries
PL Power limit function
(Reduction of the mains/charging capacity)
  SR Silent run funktion (reduction at night)
TK Temperature compensation   TS Temperature sensor is included
in the standard delivery
VF Voltage sensor
(in case of very long charging cables)
  Tropfen  Electronic system humidity-proof


Anleitung Katalog


Fernbedienung S Ladegeraete 2075

Betriebs Fernanzeige IP67 Batterie-Status-Anzeige 2082

Remote Control S (Art. 2075)

Remote Indicator IP67 (Art. 2081)

Charger State Monitor IP67 (Art. 2082)

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