Solar Panels & trickle charging

Hi everyone,
I would like to know if there is any problem using a Primus 80w solar panel to trickle charge my camper for extended periods?

Or is it best to purchase a dedicated 10w trickle charge panel for this purpose?

To explain, I have a window incorporated in the top of a custom camper trailer cover installed after the manufacturer offered it as an option. I intend to leave the solar panel connected to the camper either open totally (80w) or folded providing 40w of power. I kind of figured that if 80w was too much power being used to trickle charge, 40w may be ok.

Of course like all of these solar panels, the Primus has a regulator but it occurred to me that I simply don't know enough to make the correct call on this.

There is only one thing worse than going away with a flat battery & thats going away with a cooked one.

By the way thanks to those responsible for managing this site. You feel that the responses you get here are totally impartial & it does offer peace of mind when getting away from it all.

Brad