Waeco fridge "battery saver" switch
Posted: Thu Dec 11, 2008 7:44 pm
I have a question about running my Waeco fridge. I have a second (30Ah) "thumper" battery which I have tested will keep the fridge going overnight (with the fridge set to the second step @5C)
Now I understand that there are many types of battery isolator out there, to cut the main (start) battery out of the circuit when the engine is stopped. So the main battery is not drained (at all) allowing the car to start. I had one in the previous Patrols.
My question is - do I need an isolator with my Waeco which has a "battery saver" switch on the back, which can be set to low (10.4v) medium (11v) and high (12v)
I would assume (perhaps wrongly) that the main battery will start the car if its as low as 12V, so if I set the Weaco switch to high, then have the second battery wired in parallel, then the fridge can use both batteries until they both get to 12V. (is that right, or could one get lower than the other?)
With an isolator, I cant use any of the main battery energy for the fridge (thus extending the capacity of the thumper)
Any advice much appreciated...
Now I understand that there are many types of battery isolator out there, to cut the main (start) battery out of the circuit when the engine is stopped. So the main battery is not drained (at all) allowing the car to start. I had one in the previous Patrols.
My question is - do I need an isolator with my Waeco which has a "battery saver" switch on the back, which can be set to low (10.4v) medium (11v) and high (12v)
I would assume (perhaps wrongly) that the main battery will start the car if its as low as 12V, so if I set the Weaco switch to high, then have the second battery wired in parallel, then the fridge can use both batteries until they both get to 12V. (is that right, or could one get lower than the other?)
With an isolator, I cant use any of the main battery energy for the fridge (thus extending the capacity of the thumper)
Any advice much appreciated...