Low volts cut off relay?

[Matt84]

Hi all,

Further to my post a while back, basically my fridge when left on in the bus drains the leisure battery to the point where the alternator won't charge it due to high initial currents.

Short of upgrading my split charge setup to 60A plus is there some kind of device that senses when the leisure battery is low and disconnects the fridge from the circuit?

Thanks,

Matt