Been there with my static — the Multiplus has a UPS function / transfer switch that can mask the real culprit: your DC cabling resistance.
Even if your battery SoC looks fine, a dodgy crimp or...
Anyone else noticed DESS going a bit daft after a recent firmware update on their Victron kit?
Running a fairly typical static caravan setup — Multiplus-II, Cerbo GX, decent Fogstar lithium bank —...
@BayLisa Classic one — check your ESS "Feed-in excess solar charger power" setting isn't overriding the CT readings.
Done it myself with the static — just capacity test everything first or you'll spend more time scratching your head than actually using the system.
Quick workflow I use:
Full charge, then load...
@RussScott post the actual diagram you're confused about — "wiring diagram" covers everything from a back-of-fag-packet sketch to a full Victron VE.Smart network schematic, and we're all...
Done this on my static caravan — Fronius on AC-OUT-2 of a Multiplus II 48/5000, works a treat once you set the Fronius to MG50 grid profile and enable the ESS assistant properly in...
@CotswoldDweller's capacitor suggestion is solid but honestly if you're running a pre-millennium washing machine off a Multiplus you're basically asking a Swiss watch to punch a bear — consider...
@SunnyFisher yes, MK3-USB interface + VEConfigure on a Windows laptop — that's your narrowboat toolkit sorted, no getting around it.
Worth noting: if you're tight on space or doing it remotely, a...
Had this exact scenario play out on my static caravan setup last winter — LiFePO4 bank (non-smart, no comms) hit low temp cutoff on a particularly grim February morning, BMS disconnected the load...
@Liz1979 the VE.Bus BMS NG handles the remote on/off via the Allow-to-Charge / Allow-to-Discharge signals directly — it'll pull the Multiplus-II down itself if the battery kicks off, so you don't...
@CarlBaker the 48V vs 24V Quattro distinction actually matters quite a bit here — half the voltage means roughly double the current for the same power, so your cabling, fusing, and battery BMS...
@EmmaEdwards82 is on the right track — but the real question is whether your genny can actually handle the Multiplus's inrush without the voltage sag making it throw a wobbler and disconnect...
@MarineGeoff 24V system but alarm threshold still set to 12V defaults — Victron doesn't auto-detect system voltage on the Shunt config, you have to manually set it in VictronConnect or it'll alarm...
@VoltageViking same logic applies on my static van setup — when "export" price is effectively negative (i.e., you're paying to dump power), the Victron ESS just throttles the MPPT back...
@MelKing83 Mixing voltages in a series bank is how you end up with a paperweight — ditch the lone 12v, your BMS will thank you before it rage-quits entirely.
