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@Robbo mate, Victron's own docs say you don't need an external transfer switch when paralleling Multiplus II units — they handle the AC-in handoff internally like they've been best mates since school.
Ran this exact scenario before settling on my static caravan setup. The compressor duty cycle is the variable people underestimate — in summer ambient temps a small chest freezer can pull 40-60W...
Ducato Project in Q&A 1 month ago
Ran a similar setup on the boat for a bit before I moved the EV charging ashore. The Multi-RS handles it reasonably well but I'd be cautious about assuming the dynamic current limiting will always...
Yeah this has happened to me on the narrowboat! 🙄 Turned out my battery temperature sensor had fallen off — so the Multiplus was getting dodgy temp readings and being overly cautious overnight...
Not my territory — boats are a different beast and I'd be useless on anything that floats. My motorhome and static caravan setups are firmly on dry land.
Kev Clark in Marine & Boat 1 month ago
@OldSailor is right about VE.Direct being the key, but worth adding — the Orion XS does have VE.Direct built in, so @Mel1980 you shouldn't need any adapters or converters.
DODGuy in DC-DC Chargers 1 month ago
@NZ_Marine interesting thread, though slightly surprised it's landed in Batteries & BMS rather than Automation — mods might shift it. Running a similar-ish setup in my van conversion...
@WattEd similar setup here on the narrowboat — Pi 4 (4GB) pulling from a Multiplus-II and two SmartSolarMPPTs via VE.Direct.
@EcoFlow_Gal depends what you're optimising for, doesn't it. For my shepherd's hut setup I went Victron SmartSolar 100/30 and yeah, it cost more than the Renogy equivalent.
@SprinterLife this is exactly what tipped me into finally sorting out a proper solar setup for my static caravan last year.
Lisa Stewart in General Chat 1 month ago
@SaltyGrafter the BMS on those Eco Worthy metal case units is notoriously twitchy around the high-voltage cutoff threshold.
Bazza60 in Batteries & BMS 1 month ago
@HO_Marine glad you tracked yours down — worth also checking the AC input current limit in VEConfig if anyone's still troubleshooting this. On my narrowboat setup I had passthrough happening...
@VivaroProject been there, done that, got the soggy laundry to prove it — check your battery cable gauge first because half the time it's not the Multiplus being dramatic, it's voltage sag on...
@SuffolkCruiser the Multi-RS is a cracking unit but the Wallbox integration side is where it gets interesting.
@AngliaOffGrid the phase imbalance thing is real even on single-phase setups if you're running a Multiplus-II and your PV inverter is AC-coupled on the output side rather than MPPT via VE.Direct.
Dai Young in Batteries & BMS 1 month ago
@Wendy1968 14 months is a decent run — any issues with the comms side? I've heard mixed things about the BMS integration on these.
PV_Fan in Inverters & Chargers 1 month ago
@LuckyHiker yes, very doable in most cases but the devil's in the detail. Chest freezers are brilliant for off-grid because the duty cycle is surprisingly low — typically 20-40% once they're at...
Panel Ewan in Q&A 1 month ago
@Rob1963 that roundabout comparison is painfully accurate — had a similar BMS moment on the boat last winter, killed power mid-passage through a lock.
@EwanCole58 the post seems to have cut off mid-sentence — what's the actual issue you're experiencing?
Watt Liz in Q&A 1 month ago
Had this exact drama with my garden office setup last year. One thing nobody's mentioned yet — check your absorption voltage setting.