MA2 - Master-slave SCR battery charger and rectifier

The chargers in the MA2 series are equipped with features developed for remote monitoring and minimizing the costs associated with battery maintenance, without compromising the installation’s reliability.

Equipped with features developed for remote monitoring, the MA2 charger

minimizes the costs associated with battery maintenance, without compromising the installation’s reliability!

  • Life expectancy greater than 30 years
  • Super strong
  • Proven technology (thyristors)
  • Master-slave configuration
  • A full engineering team to support you
  • Optimal battery recharging
  • Automatic battery testing and monitoring (reduced maintenance!)
  • Embedded webserver
  • DNP3 communication protocol
  • Secure access

Input voltage

120, 208, 220, 240, 277, 480 or 600 V AC, single-phase/three-phase, 60 Hz ± 6% (50 Hz optional).

Output voltage 

24, 48, 110, 125, 220 or 250 V DC, other output voltages are available on request.

Output current

10, 20, 30, 40, 50, 60, 80, 100, ..., 600 A (50 to 100% adjustment range).

Voltage regulation

± 0.25% for a 0 to 100% load fluctuation of the rated output current, combined with an input voltage fluctuation of ± 10%, combined with a frequency fluctuation of ± 5%. No batteries are connected to the system when measurements are taken.


2 Ethernet ports (each optical and metal) (DNP3, HTTPS).

Residual ripple

2% RMS of the output voltage for the same conditions specified in “Voltage regulation”.


90%, at full charge.


input: thermal magnetic circuit breaker; output: thermal magnetic circuit breaker (2 poles)


natural convection except for the battery section, which may be provided with a fan (system with vented battery in the same cabinet as the battery charger).

Acoustical noise

less than 65 dbA at one meter, at nominal power.

Climatic conditions

operating temperature: -10°C to 50°C

storage temperature: -20°C to 70°C

relative humidity: 0 to 95% at 25°C