Jay Honeck writes:


The JPI has its own built-in voltage indicator. It will usually read
13.4 or 13.5 volts. We also have a stand-alone, panel-mounted digital
voltage/amperage meter, mounted a few inches below the JPI. It
usually reads a few tenths of a volt different than the JPI. (I can't
remember if it's up or down...)

a) Is this normal? Why would they read different voltages?

Yes normal. Many reasons, all of the don't bother ilk.

b) What voltage is normal? Is 13.4 too low?

That is low. A charging L-A battery will be at/near 14.4v.
You'll have some drop between it & the buss, but...

....Under what load do yue see 14.4? How long after starting?

What is the voltage at moderate RPM with no loads,
& with the JPI on so you can see its reading?

With every frigging thing on, including the Jacuzzi and the landing
lights? [We'll skip cycling the gear....]

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