I have charge house battery for 3hours and I check it and it only shows 11.58 volts it was showing 11.5 volt before I charge it, I just got my motorhome from cam ping world in which they had it for 3...
When checking battery voltage after charging, the battery needs to "rest" before the voltage measurement is made. Let the battery sit for a few hours unloaded and then take a voltage reading. A fully charged rested battery should be very close to 12.7 volts with no load.