Boy, you guys are good.
Forgive me for not giving all the details from the beginning. I do also use a Honda EU 2000 generator for charging. I typically charge the batteries , in the morning, using the generator (plugged into the A/C in on the back of the boat). This, of coarse, uses the Heart smart charger to do it's business. I would run the generator about 45 min-1 hour until the link 2000 started the float stage of the charge. In the late afternoon or early evening, the batteries would be down around 12.45 and I would charge again. This time with the engine alternator so battery charging and water heating could go on together.
The Engine alternator has a built in regulator and all voltage readings were made by just looking at the readout on the link. It was a good suggestion to turn off all breakers and see if the voltage recovered at all. Who knows, the refrigerator may have been running to cause to voltage to read low.