Charging An Auxiliary Battery..?

[Yendor]

Cuppa is the guru when it comes to solar, so I will leave that with him.

If I wanted to run my 60L fridge all the time in the trol, what size of solar panel should I use? Lol..seriously, is it even possible to do this? Let say for a week without starting the engine and parked under a porch and the Optima is YT S5.5. Kinda stupid but Im just curious..

If this the only reason you want solar for. I wouldn't worry about getting solar. I would just plug the fridge into mains power while it is under the porch.