You can't tell how strong your charging system to the batteries is
simply by the voltage readings unless there is a serious load at the
batteries. A serious load either from drawn way down batteries, or from
large active vehicle loads that connect to the batteries, or even better
would be both at the same time.

Mark

Steve Williams wrote:
> ..................
> Results...
> 14.01 volts between the alternator and the engine ground strap with the
> engine idling.
> 13.96 volts at both my starting battery and the house battery with the
> engine idling.
>
> Yes, I just went out and checked the readings again because it almost
> seems too good to be true. But then again, I don't have any draw on the
> alternator, would that make a difference? Headlights on? But then I
> wouldn't want to run at idle...
>
> What's a good test?
>
> I THINK a .05 vdc (.36%) voltage drop is totally acceptable. Does that
> sound reasonable to others "in the know".
>
>.................