My new to me and used RV came with two 12V House Batteries and would show 10.8 V just a short time after unplugging from shore power, so I knew I had to replace them. Some off brand car batts. Yep, th...
My first A had 12 volt batteries and I wasn't very happy with their performance My second coach had (2) 6 volts and they are still performing for the new owner after almost 8 years of use. I think your 7-10 years is realistic if you have a good charger. I had a progressive with charge wizard.