Vent in trailer

I had a enclosed trailer that I hauled my Harley in and I insulated the trailer inside. Put a crank up vent in the top. Put a vent cover over it. Put a small air vent on each side. Then I put a thick coat of the white sealer on the roof ( HENERY} that they put on the Park Models etc here in Yuma. Made a big difference in the temp. I had gas cans inside the trailer any time I had the bike inside

Not too difficult. Here's a link to a kit, with all the materials you'll need.

Put a vent in it...no problem. Just a crank up type will do and you can add a Maxxair cover so the vent can be left open as you travel.

The gas can must be a sealed type so no fumes can escape.

The air needs a way to get in as well as out. You'll need a small vent towards the bottom someplace.

I'd go for the model 800 or 900 from Fantastic Vent then, as well as the vent cover. No fan, but hot air will go out, and with the vent cover, this will work regardless of weather.

NO electricity to the trailer. Just a vent for heat buildup. This is a small cargo trailer.

I'd not carry a gas can in the trailer, if I can help it. I'd consider a RotoPax mount and have the cans mounted on the exterior somewhere.

As for a roof vent, make sure your battery on the trailer can handle it. I'd personally go for a Fantastic Vent model that has an Ultra Breeze vent cover, so the fan can be used in the rain. I'd also consider adding a vent or two in the trailer to create an airflow for incoming air... perhaps with a filter in place so the rig doesn't get dusty.

The Fantastic Fan uses about 2 amps on high, so you will need to find a way to replenish the 48 amp-hours per day used. At minimum, if you can get a 200-250 watt solar panel and a cheapie PWM controller, that would offset the battery drain.