Solar panels for leisure battery

[quattrodave]

I'm just after opinions on the setup people have for charging their leisure battery. We're off to a campsite in the summer and might have to wait a few days for a hookup so will be running off 12v. The leisure battery is a 75 ah standard battery (not specific leisure - it was in the van when I bought it so don't really want to change) running a 12 v cool box pulling 4amps, eberspacher heater for an evening and a 12v interior light. I'm looking for a solar panel to keep the battery topped up, I'm not expecting to fully charge it but just ease the battery drainage over a few days. Looking for a portable one (folding or other) probably with crocodile clips for the battery. Any recommendations or what not to buy? What wattage should I be looking at ?
Any advice greatly appreciated !
Thanks

[CovKid]

4 amps on a coolbox is unsustainable, with or without solar. If you can take that out of the equation, you have a fighting chance. Theres so much on here regarding solar, you're better off using the search. Hope that helps.

[quattrodave]

Thanks for that, I know the battery isn't going to last long, just trying to extend it to 2 days instead of 1 !
The cool box will be turned off at night as well

[CovKid]

Its possible to get 5 amps off a large panel, but thats on the basis that the sun is beaming down directly on the panel. We don't get that many days throughout the year - at least in the UK. I still say 4amps is a no-no. Lots try this then flatten the battery. Ohms law wins out here.

Just shove some ice blocks or even a 2ltre bottle of frozen water in there before you go. Should last a few days.

I have a HUGE 180ah truck battery in mine and 200 watts of solar and I still wouldn't run a coolbox drawing 4 amps - its way, way too much.

If you lived a little closer to Nuneaton, you could have my 110ah leisure for £20. I upgraded so its redundant.

[quattrodave]

Ok thanks covkid, might look around for a 3 way coolbox, probably cheaper than panels anyway !

[CovKid]

If its only a few days you only need a basic coolbox. Fill it with icepacks or even frozen 2 litre plastic bottles and you're good to go for at least 2-3 days. I see loads at the tip!