Small solar powered fan.....

SmnByt

What is everybodies thought on having say a 5" solar powered fan in the van whilst its in storage during the winter months?

purely to aid air circulation while it's shut up for extended periods. Obviously it would only work during daylight hours, I'm not interested in having a battery to keep it going 24hts a day.

Good idea or bad idea? Would it actually make any difference? 

I already have the solar panels so just a question of getting a cheap fan on eBay for a fiver

Simon