I see what you are saying now. I've never had my fridge cut out, but I don't expect to ever have it do that because I tend to keep my batteries at around 12.5v or higher, and I'm pretty fanatical about voltage drop anyway. I'd turn off the fridge or charge the batteries before it ever reached that point. I monitor them via system-wide (battery bank) monitors since I have other draws than just the refrigerator and don't use any particular automatic cut-offs. Anyway, I still don't favor the low (to my mind) cut-offs on most fridges, and I don't want them "calculating" what they think my voltage drop must be and then taking it upon themselves to compensate for it. But then we all run our systems to our personal taste and it sounds like it works well for you. :smiley_drive:
I understand about the 50% just being a guideline. It presumes that one wants to make the batteries last as long as (reasonably) possible time-wise but still allow a certain discharge - a good balance for many. I can see a good case for doing it another way in certain set-ups (lightweight rigs where you have easy access to buying new batteries and no big inverter, etc. loads). That would be to carry fewer batteries and run them down to 25% or so, then replace when they die. Even if it's twice as often, you are only buying half as many, plus you're not hauling around "extra" lead.
I do the more "conventional" way (stay above 50% [usually above 75%]) and make them last longer time-wise. This is because I don't always have access to places to buy new batteries, it's difficult for me to hoist them in and out, and the weight isn't a problem (it balances my rig side to side with water/tanks on the other side). But if I were to rig my previous small/lighter weight van again, I might do the "carry half the batteries, replace them twice as often" method.
I understand about the 50% just being a guideline. It presumes that one wants to make the batteries last as long as (reasonably) possible time-wise but still allow a certain discharge - a good balance for many. I can see a good case for doing it another way in certain set-ups (lightweight rigs where you have easy access to buying new batteries and no big inverter, etc. loads). That would be to carry fewer batteries and run them down to 25% or so, then replace when they die. Even if it's twice as often, you are only buying half as many, plus you're not hauling around "extra" lead.
I do the more "conventional" way (stay above 50% [usually above 75%]) and make them last longer time-wise. This is because I don't always have access to places to buy new batteries, it's difficult for me to hoist them in and out, and the weight isn't a problem (it balances my rig side to side with water/tanks on the other side). But if I were to rig my previous small/lighter weight van again, I might do the "carry half the batteries, replace them twice as often" method.