How long should a battery last?

swimmer_spe wrote:
Typical code 24 battery, how long should it last with lights and electric RV fridge? I am only getting about 24 hours before it gets under 11.5V. Also, would a battery shop have a way to properly test the battery to see if it is actually any good? Would an RV shop be able to properly test it?

if you have drained it down to 11.5, that battery is done. if you put more group 24 batteries in there, you'll just kill them also trying to make it through a weekend.

Like others have said you should only use 50% of the capacity of a lead acid battery MAX, for a lighter dual purpose I would never use more than 40% of its capacity if you want it to last.

What I did with my camper was install four good 6V batteries which gave me 470 AH total and because they are a heavier built battery, I was able to use 50% capacity and still get excellent life out of them. so that gave me around 235AH I could use before charging. that's about 3.5 times what you use in 24 hours, but you won't kill your battery. for boon docking that alone won't be enough, solar panels can help here. with my 5th wheel, those same 4 batteries and 480 watts of solar I don't worry about power, but I don't use a lot of 110. you having that compressor fridge it might be enough, it might not. I would start out with a single 400 watt panel, make sure there is enough room to add a second if you need to and see how it does.