In search of drier trailers

I have a box trailer with an aluminium skin. It keeps the glider pretty
dry, but in condensing conditions I do sometimes notice that the glider
skin feels damp first thing in the morning. I'd really like to prevent
this if possible. The main possibilities seem to be:

- fit passive ventilators
- fit a solar powered ventilator: the type with a built-in solar panel.
- line the trailer with a sheet of 2-3mm foam plastic of the type sold
as wall paper under layer.

An externally powered ventilator isn't on because my trailer is parked
over 100m from any power supply. I'm also based in the UK, so how
effective would a solar ventilator with integral solar cell be in our
somewhat damp and cloudy climate?

How effective are any of these solutions?


--
martin@ | Martin Gregorie
gregorie. | Essex, UK
org |