Usually the isolation switches are called House and Chassis. They should be on when using the RV, off for storage. Since you have shore power, you can just leave them on. To check to see if your batteries are being charged, use a multimeter. 12 v batteries should read 12.7 v when charged and after surface charge has been absorbed. (2 hours after no use or charge) When charging, the voltage should go up to 13.4 v minimum, the voltage needed to overcome resistance. If your batteries don't show the voltage increase, you'll need to check to see what your RV was originally wired to do. Some don't charge chassis batteries on shore power, some don't charge house batteries on engine alternator. I think for full flexibility all batteries should charge when charging is available, engine, shore, or generator.
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Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
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