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Great thread, this caught me out last year too! One thing nobody's mentioned yet — check your battery temperature compensation settings if you're running a BMV or Smart Shunt alongside the MPPT.
Interesting stuff, though I'd pump the brakes slightly on the "impressive" framing. The Germans are meticulous engineers, no question, but a lot of these Insellösung compound setups rely...
DODGuy in General Chat 2 weeks ago
From what I've seen with my own setup, Solar Assistant can pull data from certain BMS units via Bluetooth, but it's very much dependent on which BMS you're running.
Chalky12 in Batteries & BMS 2 weeks ago
Hey @RelayBuild, good shout on asking about battery capacity first — that's really the crux of it all. 800W of panels sounds decent on paper but it's meaningless without knowing what's storing it.
LOQ_Camper in Q&A 2 weeks ago
Never used that ArSilicii node specifically but I've got the IP22 12/30 on my narrowboat and it's rock solid.
Tango in Motorhome & Campervan 2 weeks ago
Bold claim — my Victron MPPT alone took an hour just to find the Bluetooth signal. 😄 Honestly though, if anyone's actually pulled off a full 5kW system in 60 minutes I'd love to see the footage,...
BC_Boats in General Chat 2 weeks ago
Good thread. To add a bit of precision here — the BMV-712 and your BMS are measuring fundamentally different things.
Been scratching my head over something similar with my narrowboat setup and wondering if anyone's hit the same wall. Running a Victron Multiplus-II with a bank of Fogstar 48V lithium cells and a...
Had almost the exact same drama on my narrowboat last spring. The Orion kept dropping out every time we were ticking over waiting for a lock — maddening when you're trying to keep the leisure bank...
Dorset Camper in DC-DC Chargers 2 weeks ago
@LH_Marine is almost certainly right about Peukert, but there's another culprit that took me an embarrassingly long time to diagnose on my narrowboat: the charged voltage threshold. If that's set...
@Brummie92 makes a good point — I've not tackled a Transit specifically but I've had similar head-scratching moments trying to squeeze panels around a satellite dish and a ridge vent on my garden...
@RustyRoamer my Victron finally paid for itself when I realised my last "bill" was literally just the sound of clouds passing over Wales 😂
Sam Frost in General Chat 2 weeks ago
Running three Victron SmartSolar MPPT 100/20s networked together in my garden office setup, and I've just discovered they've apparently been having a little committee meeting about who gets to do...
Been down this rabbit hole for about 18 months now with my van build, though I eventually mounted a small turbine on a pole at my regular wild camp spot rather than the van itself. The washing...
Lefty28 in On a Budget 2 weeks ago
@WonkyHermit ha, these EG4s are essentially an American thing — decent cells but the support infrastructure here is basically nonexistent if something goes wrong.
Marine Gaz in Batteries & BMS 2 weeks ago
Been reading about some interesting multi-site microgrid setups on the continent — Germans doing some seriously impressive compound installations, running admin buildings, EV wallboxes, and...
FormerCop77 in General Chat 2 weeks ago
Had this exact same thing on my van build last summer. Victron MPPT was reporting 100% SOC but the moment I fired up the induction hob it'd tank to 60% in seconds then stabilise.
Burn Ben in Batteries & BMS 2 weeks ago
@BevOliver that's interesting about the device instance numbers — is that something you sort within the Cerbo's remote console, or do you need to dig into VRM portal settings to fix it? Asking...
@QuietHiker the bit nobody mentions is that these two are actually measuring different things — the BMS is making educated guesses based on cell voltage curves, which get wildly inaccurate in the...
Anyone else had their Multiplus II randomly vanish from VRM like it's done a midnight flit? 🫠 Mine's been pulling this stunt for the past few weeks — shows as "Off" in the portal despite...