samsgoneagain posted:

oh.. i was going to put it from the second battery to the fridge so when the voltage drops too low the relay would cut out and stop draining the battery. like a cheap voltage drain switch thing i suppose..

Mike Harding posted:

Nice idea Sam but it won't work I'm afraid.

By the time most 12V relays reached the "drop out" voltage the battery would be well below its minimum voltage. Take a look at some of the electronic cut-out devices available; they are not too expensive.

Mike Harding

samsgoneagain posted:

ok, thanks mike and co.

Mike Harding posted:

Even better... I think Derek will be able to sell one to you!

V8 Troopie posted:

That one switches off at 11.2V. This is a bit too low IMO to save a battery.
The gadget has an English front panel but the important details on the back are in German!
Abschaltspannung = switch off voltage
Einschaltspannung = switch on voltage
Max. Stromaufname = power rating

Klaus

Ray posted:

I baught one off Derick. Cheap and works fine. I just fitted an aderson plug to match my fridge