House batteries not up to ah rating
Bought 2 new Interstate SRM-24 group 24 RV/Marine batteries a few months ago. I have used the MH 4 times on trips lasting from 3-6 days. Never going below 40 amps before recharging. The rating is 85...
Forum Discussion
Alternator reduces voltage as it heats up. It would be below 14V during your drive home and not contributing much. Also depends on the size wire going from the alternator to the house batteries. Skinny wire will drop even more voltage.
