Want to know where to buy? Click here
Find the right charger for your needs

User Guide Download

1280 - 12 Volts 80 Amp Automatic Switch-Mode Dual Output Battery Charger

General Features

  • Fitted with boost phase time-out timer to avoid excessive battery gassing
  • Overheating and short circuit protection
  • IUOU charging characteristic with time limited UO Phase
  • Fan ventilation
  • LED charging display
  • For motor homes, on sailing yachts, ambulance, and emergency vehicles

Charging characteristic
The charging characteristic is generally designated as a modified IU0U characteristic

I phase
At the beginning of the charging process, the empty battery is charged with constant current until the battery voltage reaches 13.8 V or 27.6 V. When the battery reaches this voltage level, the charging current slowly drops. With the drop of the current to the 80 % mark, the charger switches over to the higher charging voltage 14.3 V/14.7 V or 28.6 V/29.4 V.

U0 phase
Here the time registration starts which limits the main charging phase (U0 phase) to a maximum of 4/8 hours. With the switching over of the charging voltage, the current rises again to its maximum value. Now it remains constant as long as the battery voltage is below 14.3 V/14.7 V or 28.6 V or 29.4

V. After reaching the maximum voltage, the current drops again. Thereby the voltage remains constant (U0). Within this main charging phase, which is limited to 4/8 hours, the battery is fully charged.

U phase
If the current decreases to 10% of the rated current or if the time limit of 4/8 hours is exceeded, then the charger switches over to economy charging (13.8 V or 27.6 V) (U phase).


Input 98-132 VAC/115 VAC
Frequency 50-60Hz
Isolation Internal Primary
Input-Output 3000VAC
Input Case 2500 VAC
Out-Case 500 VAC
Safety Designed to IEC 950
EMI-EMC FCC Class B, CE, C-tick
Standard AS3193
Input Connection 3 Core SAA Cable IEC
Case Dimension 375L X 108W X 230H mm
Casing Material Extruded Anodized Aluminium
Weight 6.0 Kg
Cooling Fan Cooled
Warranty 24 Months
Battery Connections Two
Efficiency 90%
Boost Voltage 14.4/14.8 VDC
Float Voltage 13.8 VDC
Output Charge Current 80 Amps
Short Circuit Protection Output Shutdown
Over Current Protection Secondary Power Limited
Reverse Polarity Protection Internal Fuse and External Fuse
UO Phase Limitation 4 or 8 Hours
Operating Temp Range -5 C to 50 C
Storage Temp -30 C to +85 C
Relative Humidity 10% to 90%
Altitude 0 - 3000 m
Want to buy? Find a local or online stocklist right here