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Originally Posted by blaine
Is it not normal for charging system to act this way?
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Yes and no.
It is NOT normal to have the system voltage drop that low......ever.....except when the starter is running.
Then it depends..........
On exactly how your voltmeter is connected. If it is not direct to the battery and the wire is on the thin side, you might not be reading true battery voltage.
Your idle speed might be a tad too low. It might take just a little tweek to get it out of the red.
With your extra lights and your history, what you are seeing might be "normal" but it would make me a little nervous.
How often do you use a battery "tender', if ever.