Cybernetica AS
  Department of Navigation Systems

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Battery Charger E148 for solar or wind power                                      

The lifetime and capacity of a battery used in secondary power supply systems for marine aids to navigation strongly depends on the operating conditions and on the charging process. This is  particularly important when using solar and wind energy due to irregularity of supply. For instance, the amount of available solar energy during the winter months is very small and solar powered systems may need to operate using the energy accumulated in summertime. Therefore, the charging system has to maintain the batteries as fully charged as possible while not overcharging them. Overcharging would lead to boiling out of the electrolyte and resultingly, to damage to the batteries.

Cybernetica AS has applied special efforts to find  the most efficient methods of charging the batteries and, as a result, the microprocessor controlled optimizing battery charger E148 has been developed. The purpose of this charger is to guarantee the continuous power supply of autonomous systems using solar and/or wind/wave energy for charging the lead or gel batteries. When optimizing the charging procedure the type, nominal voltage, capacity, and the charge  factor of the battery as well as the temperature of the ambient air are taken into consideration. The optimization will be performed using an algorithm in the firmware of the microprocessor. The Solar Charger E148 is ready to  be integrated into a remote control and monitoring system for utilization of its diagnostics capabilities.


  • charging of lead or gel batteries of nominal voltage 12 V with the capacity from 30 up to 999 Ah using solar, wind or wave energy. The voltage converter of the charger follows the voltage of the battery and optimizes the charging process. The charge factor will be determined by the microcontroller  measuring  the current, voltage, and temperature of the battery
  • periodical checking discharges and formation of the battery to be initialized either locally by the maintenance software, or remotely by the control and monitoring system
  • heating of the battery when the temperature of it lowers below 0°C  until it raises up to +3°C (in case there is enough energy available in the battery)
  • sending of emergency and diagnostic messages to the control and monitoring system about the voltage,  temperature and charge factor of the battery and accumulated charge during the last twenty-four hours
  • storing of statistical data about the last 8 changes of the state of the battery and 512 diagnostic records about mean voltage and  current of the battery and energy sources

Photo of the charger E148


Solar energy sources
 from 1 to  3 solar panels, e.g. LA361 K51
Wind energy source 
 wind generator, e.g. WINDSIDE W0,3
Wave energy source
 any wave generator not overloading the inputs of the charger
Nominal voltage of lead or gel battery
 12 VDC
Current of one input
 8 A maximum
Total input current
 20 A maximum
Battery formation current 
 15 A maximum
Heating of batteries 
 below 0°C, up to  +3°C of temperature of ambient air
Ambient air temperature
 from -30°C to +50°C (IEC 60068-2-1, IEC 60068-2-2)
Relative humidity
 up to 98% at temperature +35°C (IEC 60068-2-30)
Operation in salt mist conditions
 allowed (IEC 60068-2-52)
Mechanical vibration
 10 to 500 Hz with acceleration 2.2 g (IEC 60945 section 8.7)
Ingress protection 
 The charger shall be housed within a cabinet with ingress protection to IP64
 (IEC 60529)

  Layout and dimensions of E148

Layout and dimensions of the Charger E148

Download the E148 catalogue page in Adobe pdf format.

Please do not hesitate to contact us for more information and price quiotations. We may also be able to offer product customization and design services to accommodate your unique requirements.

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© 2002-2013 Cybernetica AS. Last updated 2013-08-07