I have an 05 KSDP. Forget the chassis. My coach has an inverter. My coach came with 2 house batteries. Remember, the KSDP was the entry level DP in 05. The coach could have come with 4 house batteries if the option was purchased.
My assumption is the charger is working as it should.
As to keeping the batteries charged, are these the original batteries? If
so, they are, most likely worn out. Try this:
1. check the water
2. Disconnect them from the coach. Leave them connected to each other.
3. With a portable charger, charge the batteries fully.
4. Disconnect the charger. Let them sit for a couple of hours.
5. With a meter take a VDC reading. It should be 12.6 VDC or higher.
6. Let them sit for a week.
7. Take another reading. It should be 12.6 VDC or higher.
8. Take the batteries to your local auto parts store and have them do a load test.
The above steps will tell you the condition of your batteries.
__________________
Gary
2005 Newmar KSDP 3910 + GMC ENVOY XUV 37K lbs Moving Down The Road
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