Sorry if that wasn't clear. The 330 amp bank is just what is in the boat that will need replacement. I was wondering if upgrading to an 800 amp bank was sufficient.
The plan was to run the engine driven fridge an hour in the morning and an hour in the evening. Do you think that is still insufficient? That has been fine for a week at time in the past with a Seafrost system, but we didn't have anything in there that needed to last over a week, either.