In my research of this option, I found that UltraHeat offers a few control improvements. This Master Power Control Kit
I have linked to here, could help with not having the unit come on unless it is needed. I like the options also to install separate controls for each tank. If only the fresh water needs monitored, I do not have to waste the power on the gray and black, or just the fresh and gray, or whatever. You may have to be somewhat of a master do-it-yourselfer to get this done, but taking it to your dealer for these upgrades to protect your warranties and electrical system would be wiser. If I were planning a winter trip, this would be an ideal upgrade. If you are determined to use this as a winter storage package, which probably is not a good idea, some of these control improvements would help a great deal, particularly in an area such as Texas that can be 75 on Christmas and 20 on New years.