Hopefully it will be but I opened the casing to use the existing wiring and back box on the van system, the casing doesn't match the previous model so I also had to drill through it to match the threads on my mounting plate on the tank frame. On top of that I have sealed the casing to the plate with a marine adhesive to prevent any moisture getting through the back. So It's doubtful the warranty will hold up methinks, I don't want to go through the hassle of rewiring the old one back in to remove it all over again.
I have another on order :

so if I can't get any joy with the suppliers, this one may go off for repair provided it's reasonable.
Franky - I found your post of the guy in Scotland who does repairs so I might try them in a week or two.