Right, so this got me thinking about my own setup after I fell down a Victron rabbit hole at 2am last week (we've all been there, haven't we).
My Kangoo conversion runs a single Multiplus-II and it handles everything beautifully, but I've been scratching my head about a hypothetical scenario — what if you had two separate AC consumer circuits that you wanted to keep genuinely isolated from each other? Not just two ring mains daisy-chained off one inverter, but two circuits with different load profiles behaving independently.
On a boat conversion this would be a fairly common requirement, apparently. Two shore power inlets, two separate AC busses. But it translates neatly to certain tiny house builds too — imagine wanting your workshop tools on a completely separate circuit to your domestic stuff, with different overload tolerances.
A few options I've been mulling:
- Two separate Multiplus-II units running in parallel or split-phase (though split-phase is more of a North American headache)
- Using the AC-out 1 and AC-out 2 outputs on a single unit — out-2 drops when you go off-grid, which suits non-critical loads nicely
- A Quattro instead, which gives you two AC inputs natively
The Quattro route seems elegant if budget allows. Victron's documentation is brilliant but occasionally sends you round in circles trying to confirm what actually happens when loads spike simultaneously across both outputs.
Anyone here running a Quattro or dual Multiplus setup in a fixed tiny house or vehicle install? Curious whether the real-world behaviour matches the spec sheets — it rarely does in my experience! 😄
