Slow starting, low voltage on VMS-PC
Well, another example of how the KISS system works, even if I don't do it the right way.
Recently it seems like my starting batteries are not as strong as they have been, slower cranking the starter, lower voltage on the VMS_PC ( saw 9 while cranking once). Batteries are 2 Group 34 Durlast Platinum batteries, 750 ca each with 3 year full replacement which is good until this November. I have an ECHO charger installed and also solar going straight to my house batteries, so I should be fine, I think.
Yesterday took the coach over to AutoZone to have the batteries tested.They tested the bank together which showed good, but I asked them to separate the batteries to get a true reading. Both separate batteries read good on the load test- good news and bad news. I asked them to leave the batteries disconnected while I clean the connections, then I re-connected and tightened them myself. The tech did say one of the connections was not real tight. After I cleaned and tightened, I went in to start without using the boost button. She fired up right away- success.
We then drove to the campground we are staying in and I turned off the coach while we went in for the process of checking in. When I returned to the coach again I started it up without using the boost button, and she fired right up.
Moral of the story, I thought I was using the KISS idea about checking the batteries first ( after all they are still under full warranty), but the cause of the problem was either the loose connection, dirty connections, or both. Thought I would share my experience to help others figure out starting issues if they have them. Check the simple things first- KISS
Cya down the road 
Topic: Slow starting, low voltage on VMS-PC