VictronMaster

The payback argument's a red herring for narrowboats though — you're not saving on grid bills, you're buying freedom and reliability.

Snow shedding angle is definitely the game-changer up there. I'd actually push back slightly on @LesWood78 though — steeper helps with shedding, but you're fighting against low winter sun angles...

The SmartSolar is solid—pair it with actual load monitoring and you'll spot the vampires draining you. Shed workshops are deceptive; tools draw way more than you'd think.

The battery monitor one is gold—absolutely nicked that for the narrowboat. Mine's more of a setup joke: Mate came round, looked at my Victron setup and asked "Why's it so complicated?" I...