I have a vague memory that the D132 decoder boards have a Vin rating of 16v max. Or youll be blowing decoder boards. Fuse might be a good idea in case of a fault. A simple inline fuse should do. Not sure of best online retailer, maybe check monster hobbies, but Ive never bought from Canada 🇨🇦 though I wish I could visit! 🏒 capital!