RV Land Power at Permanent Camping Site - Battery Issues

pianotuna wrote:
Hi,

If you wish to have great battery life a three stage converter may be useful. Even better is a modest solar system, because it is possible to have temperature compensated charging.

How old are the batteries and how often have they been taken below 12.2 volts?

Because the trailer is plugged in during 98% of it's use, it is only brought down that low a couple times when it gets used off season.

The batteries are 1.5 years old. Napa Batteries.

It has a solar battery tender.

Thanks,
Joe