westend,
Are you referring to this post?
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"Unless it's very hot out, the voltages your seeing are correct and normal. If you manage to lower them you won't be doing your batteries or anything else any favors."
Yes, it's been very hot. And, my motorhome has spent most of its life (13 years) in the sun belt, from Arizona to Georgia. I'm the only one who has driven it. I've jumped in it when the weather is HOT, and have started it many times, as you can imagine. I always check/monitor the instrument panel meters/gauges right after it starts. THIS is the first time the voltmeter has gone that high, and this is the first time is will NOT go down, at all, no matter how long I run it (within reason). Therefore, I simply have to find out the reason. I'm not going to do nothing, I gotta do something. Right now, I'm simply going to try to eliminate the possibility of the problem being a bad battery. Out of six, batteries, I've got 2 to go. Then, I'll report back. I feel I owe it to everyone to do at least that.
But, I've got to ask, what would you do? OK, I see what you would do. I've already cleaned all the cable-to-battery connections (many), and I've checked the battery voltage, separately with cables disconnected. These two batteries are a bit over 6 years old. That's about the interval that I've always changed the batteries, anyway. Why not now?
