Thor Forums

[Miramar Owner]

Originally Posted by smasiello

We have been loving our Thor Challenger since we picked it up in July, but one thing that eats at me is how long our batteries (don't) last. It seems that anytime we are boondocked overnight the batteries get dangerously low, and have twice gotten low enough where I needed a jump to be able to start the rig. Thank goodness for Good Sam Roadside! The display shows BOTH the house and chassis battery levels get quite low. The last time we had to jump all we had running overnight was the heater (it was around 40 outside).

Is this a result of crappy stock batteries that came with the rig? Should I get some nice interstate deep cell batteries (had them in my previous Class C and they worked like a champ!)? The water level on the batteries is fine. Is there something that I should be doing when I am boondocked overnight that I might not already be doing?

Thanks in advance for any thoughts!

I have a Miramar which is very similar to the Challenger. My house batteries wouldn't allow me to boondock more than a day without starting the generator to recharge. After a year I removed the 2-6 volt house batteries and replaced with 4-6 volt Duracell. No more problems with boondocking.

However, bad house batteries should not draw down your chassis battery. You may have either a bad chassis battery or for some reason it is not receiving a charge from your system.