QUOTE(Beastdriver @ Oct 29 2006, 10:17 AM)
That woud depend entirely on what type of battery was put in the unit to start with. Batteries come in 12-month life, 24-month life, 36-month life, 48-month life, and occasionally you can find one with a 60-month life. Usually, there is a tag on the battery with the installation month and year punched out but, of course, you have to know the lifetime of the battery that was put in to compute when the battery is "supposed" to wear out. You indicated that your motorhome is one year old, and I am assuming that this means it was brand new one year ago. If this is the case, there is a better than even chance that the batteries are 36-month batteries. If so, you've got about 2 years to go if you take care of them. Hope this is helpful.
Thanks for your prompt reply, we will do some checking on when they were installed and try to find out which batteries were installed.