Electricity consumption on a Trickle Charger

[AyOneTen]

Planning to convert my A110 GT into a summer car and planning to store it during the winter.
My problem is that my winter storage spot does not have a socket to plug the trickle charger into.

Is it worthwhile to look into buying an external powerbank/Power station?
Does anybody have any idea how much energy is used for trickle charging during one month?
The alpines battery is said to have a capacity of 80Ah, but how much is needed to maintain a charge?

Any ideas or comments?

[indigochim]

There was enough thread yesterday and a suggestion was a cheap solar panel as a trickle charge.

As for how much power it will take to keep it topped up is down to how much parasitic drain the battery has rather than the capacity of the battery.

[a110au]

if it wasn't for the battery posts being so inaccessible with the trim in place I'd say fit a battery post isolator switch and be careful about the windows. There isn't much lost when reconnecting the battery, just the time/date.

[OldGermanHeaps]

Solar panel on the garage roof and a magcode connector.