Solar panel charger for leisure battery

A 20w panel should be adequate to keep you battery topped up. I use a 10w one to keep a 12v electric fence battery charged but without a controller and I have not found that to be a problem. Better to have a controller though, much less chance of damaging the battery. I also have a similar set up as SQ on my motorhome but  it is a 120w panel also supplied by Sunstore. Its been toatally reliable these past 6 years.

peedee

If all you want to do is "maintain" the battery and not "charge" it, then a 20-40w panel propped up in a south facing window will do the job. The Amazon one mentioned is pretty much par for the course for that type of thing.

A serious solar setup is going to cost a whole lot more. I've got 3 x100W semi flex panels wired in series through a 30A MPPT controller but a setup like that and you won't get a lot of change out of £700. Of course, with a caravan, payload is a constant concern although semi-flex panels are lighter than framed ones. Lots of info in this thread https://www.caravanclub.co.uk/club-together/discussions/welcome-hobby-talk/tips-for-making-caravanning-touring-cheaper/how-to-survive-a-non-240v-ehu-site/

Agree with all the above...

where do you store you're van?...

if in storage, can you bring the battery home or does it need to run a tracker?

if at home, just use EHU occasionally to top up.

when in the van, are you ever off grid, no EHU? If not, no need to go overboard with large panels, these small panel kits will be ok for a top up if placed in a south facing window.

like CY, Ive got 300w on the roof, MPPT controller, 2 x 92ah batteries but I go off grid and need to charge Ebike batteries while away. Different requirement, different set up.

Recently had a caravan stolen by folk from a certain demographic. The far where I store the van have offered me a spot in one of their barns - it’s quite light and airy and not in any way dark or claustrophobic 

Will a 80 watt solar panel as fitted by Bailey Caravans function in the winter months in barn storage?  Anyone got any experience of this in the circumstances above?

Not if you are undercover I would have thought. If you had an array of say 4 x 100W wired in series, you might get sufficient to maintain a battery but even then you would still not get any significant output. The panel is effectively in permanent deep shade.