National Luna Single Battery Monitor

  • Description



The National Luna single battery monitors can be used for any installation that requires careful monitoring of lead-acid battery condition. These monitors use digital technology for increased accuracy and feature low-voltage and over-charge warnings.

The single monitor is available with or without audible alarms. Models with audible alarms have a mute option as well as display on/off option. A brand-new recessed version of the single monitor is available which is flush-mounting and can be used for permanent installations such as caravans, trailers, solar installations and boats.



  • Simple installation
  • High-accuracy digital technology
  • Excessive discharge warning
  • Over-charge warning
  • Polarity protected
  • Extremely low power consumption
  • 11.4V to 15V operation (ideal for automotive use)
  • Audible alarm option
  • Display on/off option (Sleep mode)
  • Recessed version available for panel-mounting


Physical size 94mm (l) x 48mm (w) x 20mm (h) (standard version)
Weight 130g
Power supply 8Vdc – 15Vdc (display range: 11.4V – 14.2V)
Low-voltage warning DC voltage below 11.4V
Over-charge warning DC voltage above 14.65V
Cable 3.5 metre moulded ripcord
Power consumption 4mA (sleep mode-option) , 18mA Average
20mA max