Prevent Harmful Over-Discharge Of Your Leisure Battery With Our Battery Guards

Tuesday, 24 June 2014  |  Paul

One of the best ways to 'kill' a leisure battery and reduce its lifespan is to discharge it too deeply, which can cause irreversible damage, lowering its performance and ability to hold charge. You can now protect your battery from an over-discharge situation using our programmable battery guards from European power conversion specialist Samlex. 

These battery guards work by continuously monitoring the battery voltage and disconnecting it from the consumers when it reaches a user-selectable low voltage-threshold. They also disconnect the battery in an over-voltage situation, so protecting sensitive electronic appliances from damage resulting from faulty alternators or chargers.


  • Auto-shut-off at under-voltage
  • 10 programmable low voltage thresholds
  • Auto-shut off at fixed-value over voltage (16V/32V)
  • Robust FET technology- no moving contacts to wear out
  • Waterproof (40A-200A versions)
  • Auto selects 12V or 24V battery voltage (no need to programme)
  • Remote On/Off capability (40A-200A versions)
  • Output for alarm/warning light etc. (40A-200A versions)
  • LED to indicate operation (40A-200A versions)
  • Extremely low current consumption and voltage drop

These battery guards are available in five models capable of carrying 18A, 40A, 60A, 100A and 200A continuous loads. You should determine the maximum current you are likely to draw from your battery and then choose a battery guard that has at least this current rating. For more information click here.

In addition to using a battery guard it is essential that your leisure battery is re-charged using a good-quality multi-stage battery charger such as our Rovert Electrical automatic chargers (available in 12A,  20A and 25A outputs)  in order to maximise its useful life.