Good technical detail, Bryon.
I noticed that the WindChaser's heat pump is a Peltier junction, which is an interesting choice that has some appealing features. While I'm not minimizing the importance of the device's behaviour changes with temperature and power supply voltage, the point about the dew point versus the ambient temperature applies regardless of the heat pump choice - the usual compressor-driven refrigerant system faces exactly the same situation, which can lead to problems such as no moisture extraction, or the frost which I mentioned earlier.
These problems are why I don't use a dehumidifier over winter in my trailer, but that WindChaser is so small (and should be so quiet) that it might be good for us while camping in spring and fall
for damp and cool days. In that case it could sit in the sink and drain there; over winter for me the sink would not be a suitable destination for water even if the trailer were heated (since the greywater tank is in freezing conditions under the trailer).