I have a question relative to voltage for the engine and for the house. I have two gauges on my dash each labeled engine and house. The engine voltage appears to read about what I think it should, somewhere between 26 and 27 volts. However, my house gauge displays a pegged out gauge of somewhere north of 28. What should these guages read? Once I have determined that, I need some input on what might be causing such a high reading on the house side and what do I do to diagnose/repair. Thanks for your thoughts.