Ditto what Jamie said. Bring your voltmeter with you, After you are satisfied with the Air Conditioner and Microwave, and the Refrigerator on AC, unplug it from shore power for the rest of the PDI. Check your battery voltage when you are done; should be close to 12.6 Volts.
My CW swapped out both my batteries for new Exides during my PDI because they were both dead on a 2016 coach in April of this year.
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