Electronic rust protection.

I'm likely to use my Evoque to its full and take it onto the beach every month or so, therefore I am considering electronic rust protection for my Evoque to be installed after I take delivery.
Has anybody had this installed on theirs or have any experience of these systems with previous 4x4s?
Any advice or thoughts would be useful as my Jeep is looking very sorry for itself after 2yrs of beach trips.