Low voltage auto battery isolator.

[SJamieson]

Does anyone know where I can get automatic batter isolators that isolate when the battery voltage drops to a particular level?

I know they did exist at least as I have one on my vw caddy, however the company doesn't seem to be on the go anymore.

 

[Steevo]

Battery Guard 2000 - 200 Amps

The Battery Guard constantly monitors available battery power when the engine is not running, if the battery voltage falls below 12.1v or 24.1v a voltage sensitive timer in the ECU is triggered. If the available battery voltage remains below 12.1v or 24.1v uniformly for 2 minutes, the Battery...

www.standbyrsg.co.uk

 

[Green&Steam]

Found in my 2015 Durite Product Catalogue
Website www.durite.co.uk
don't no who your your local would be!!
Voltage sensitive battery isolator relay / solid state battery guard

 

[Lincsman]

If the alternator fails (or belt snaps) and you have headlights on does it isolate while in the fast lane of a motorway?