Here's another addition I added to my bus conversion.  I wanted to be able to monitor my RV power grid from the drivers seat and anywhere in the bus. So the wheels got to turning again.

This is a very simple and inexpensive project. However it can save considerable hardship and foresee problems. Total cost for this was less that $40.00.

On my setup, the top meter monitors the house battery. The second meter from the top monitors the chassis battery.  The third and fourth meters from the top monitor each leg of the AC circuits. I can see this while I am driving and from most anywhere in the bus.

Rational:

In the DC circuit:

  • I can watch the to DC monitors and tell how my battery levels are at any given time.
  • I can also tell if my battery isolator is operating properly.
  • I can see the need to shut something down if the low voltage alarm or cut off should fail.

In the AC circuit:

I used two AC meters so I can tell if I am on a 240 volt line or a 120 volt line tied to both legs of my 240 volt wiring. This is good to know if you have two air conditioners in your unit and want to run them both. If both numbers always remain the same no mater what you turn on, you are most likely sharing the same 120 volt line. When you turn on a heater, AC, water heater or any electric appliance with considerable current drain, one line should be slightly lower than the other. It may only be a volt or two but it should be different.

If you have 30 amp service you should only need one AC meter.

As usual there is much more to come. You can view the complete build process at Instructables.com. You can follow my entire school bus conversion and my travels at leonardsteward.com.

Thanks for looking,

Leonard

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Comment by Pat Daly on October 19, 2014 at 3:18pm

Pretty neat and inventive installation!  Thanks Leonard. Folks, check out Leonard's web page

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