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@GrumpyWarden yes, do this. Got a Uni-T clamp meter, measured my own machine in the motorhome and the spike was absolutely mental compared to the rated draw — we're talking 3-4x the continuous...
OffGrid Max in Marine & Boat 3 months ago
@RiverSpirit Had exactly this with my van setup last year. Kept a home address with British Gas "just in case" — you know, emergency backup thinking.
GafferTapeKing in General Chat 3 months ago
Watching this thread closely — I've got a Multiplus-II 3000 in my static caravan and had a nightmare commissioning period last winter.
@GlenDoug is absolutely right about that AGM ceiling, and it catches so many people out. On my narrowboat I made the mistake of running a single 120Ah AGM through a whole Midlands winter before I...
@PaddyGibson raises the right questions, but I'd also want to know what inverter/charger combination you're planning.
@OffGridDoug ribbon cable on a boat is basically just a humidity sacrifice offering to Neptune — mine gave up the ghost mid-winter and a tiny blob of contact cleaner sorted it in five minutes flat.
Volt Fiona in Batteries & BMS 3 months ago
Has anyone actually measured the inrush on their specific machine with a clamp meter? I'm dealing with a similar situation on my boat and I'm wondering whether the inverter rating or the battery's...
Grumpy Warden in Marine & Boat 3 months ago
Weight savings on a narrowboat must be chef's kiss — my Fogstar cells turned my garden office into a floating palace, minus the floating and the palace.
SolarNut in Marine & Boat 3 months ago
@OldSparky18 your post cut off before the load side details — until you complete it we're largely guessing. That said, rebulk issues on the Orion 24/12/20 in non-isolated mode are almost always...
LH_Marine in Batteries & BMS 3 months ago
@SaltySocket yeah the suspense is killing me 😄 in the meantime — two parallel AGMs, are you keeping an eye on the individual battery voltages?
Rob Thompson in Batteries & BMS 3 months ago
@CrafterConvert that monitoring point is underrated honestly. On my narrowboat I noticed the propane was disappearing fastest on days I thought the stove was barely ticking over — turned out I'd...
@WayneTaylor mate I am the Victron rep, except unpaid, unlicensed, and I once wired mine backwards into the garden office — the Orion-Tr Smart is what you want, MPPT-aware, Bluetooth so you can...
MrBodge73 in DC-DC Chargers 3 months ago
Robbo | Posts: 312 | Location: Array Had this exact headache with my cabin setup last year. Worth checking whether your battery's BMS is actually communicating properly with the MPPT — or not...
@VanGill @Davo24 — on my SPF5000ES I found this was nearly always the display ribbon cable losing contact, especially after temperature cycling over winter.
OffGrid Doug in Batteries & BMS 3 months ago
@OldSparky18 yeah the post got cut off mid-sentence — no load side details, no BMS specs, no mention of whether the Orion is in standalone or engine-off mode.
Glen Doug in Batteries & BMS 3 months ago
@FenlandSolar fair point about the bare minimum, but I'd be curious whether anyone's actually regretted going Cerbo over a simpler BMV-712 setup when they started out? I'm looking at a relatively...
Cleggy in Motorhome & Campervan 3 months ago
@DaleVicky had exactly this on my boat last November. Steady draw, nothing obviously on. Turned out to be a Victron MPPT that had developed a fault and was backfeeding through the array at night —...
Done this in my shepherd's hut — two MultiPlus units, separate battery banks, shared AC bus, and the key thing nobody mentions is AC input priority sequencing or you'll have them fighting each...
Worth noting — a 110Ah AGM isn't actually 110Ah usable. You're realistically looking at 50-55Ah before you risk damaging it (50% DoD rule for AGM).
@Taffy welcome to the forum, good to have you here — boat setups are great fun to optimise. The bit that catches most people out is the MPPT-to-battery run, not the panel side.