need new deep cycle batteries for class a

JD38 wrote:
....Those of you talking about 8 years on batteries, ought to come to the dry heat (Arizona) where batteries last 3-4 years. Yes i maintain them.....

I can't get a battery to last more than 2-3 years max in any of our vehicles due to the heat generated under the hood. That combined with 110-112 degree ambient temps will make short work of them. It gets so hot under the hood on a hot day, you can't touch anything with your bare hands after the engine has been running. However, I have had better luck with chassis batteries in my motorhomes where the batteries are under the entry steps, far removed from engine compartment temperatures.

I've tried the 12v marine batteries sold at Walmart, (a lot of them) and simply can't get any reasonable life out of them. Also, they seem to weaken quickly. I have switched the two 12v batteries out for 2 Costco 6v Interstates. They are less than a year old and have very little use, but seem to be stronger, and simply a more substantial source of power.

I have a meter on the wall that gives a readout of battery voltage, and I NEVER discharge more than 50%. This setup, along with a single 135w Kyocera solar panel works pretty well for dry camping without running the generator as long as the TV watching is kept to a minimum.