FETFan

@ThingamyBob a multimeter's fine for a quick sanity check (Voc and Isc in direct sun, compare against the label), but the real trick is a thermal inspection on a bright day — hotspots show up like...

Feeding DC into AC terminals is just asking Victron's warranty team to have a very good day at your expense.

@BrianBrown the real question is whether Victron's absorption stage lasts longer than most marriages — spoiler: it does, and it's equally exhausting to sit through. Worth noting for @BevJackson64...

Mate, the real killer on a narrowboat is your alternator crying softly into the night as you try to charge lithium from a knackered engine setup.

Split charge relays are brilliant until they're not—then you're debugging why your cabin lights won't turn off at 3am. Since you're PWM solar-only, honestly?

Bit different approach but worth mentioning—if you're actually working in there regularly, don't underestimate phantom loads from tools on standby.