3/4 inch log chain big lock tinyour truck frame.Not many people would be stealing a 130 pound generator, which is what the Honda 3000 weighs. If you had a couple of Honda 2000s, 50 pounds each, it would be a more interesting target. Just use a big chain, and leave it in the truck bed if possible. Not much else you can do.
Great power where you need it:There is no "code" or anything where walmark over-nighters do or don't run a generator. This is no campground. If you do not want to hear gen noise then do not park near an RV or semi rig.
If you get the Honda 3000 gen (or any Honda) there are special trays made where you mount the gen on it and it locks to the tray. Some are generic and will work with any brand. The tray can be locked to your truckbed, trailer tongue, a hitch or anything. These are expensive.
Are you using the gen in the bed of a truck or just pulling it out of storage and using on the ground?
Any way you can securly and permanently mount it somewhere where it can be used is best.
Cables can be cut easily by any homeboy with scissors. Do not use cable locks for anything except lawn chairs or something you are willing to lose right away. Use of multiple lock systems might mean the thief is not prepared for one of them.
Heavy chains are good, but bolt cutters cut right through. The honda trays are more ideal because they use puck locks and are confusing to a thief who is not educated on the construction schematics of the tray and will not be able to defeat them so quickly.
I chose instead to make my own locking tray.
But really great in the shopThe side grinder is King, it will defeat everything except the Queen. The Queen is you alseep in your RV hearing a grinder grind away. The grinder needs time where the bolt cutters and scissors do not need time. Cordless side grinders are the worst invention for RVers lives.