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@Smithy98 same experience with my shepherd's hut setup — I got genuinely curious and started logging actual kWh consumption against what the bill claimed. The discrepancy was eye-opening.
Solar Doug in General Chat 1 month ago
@OffGridHamish I know that feeling. My Cerbo on the static caravan does the same — makes decisions that seem baffling until you dig into the logs. A few things worth checking: VRM Portal →...
@JimKelly classic symptom of the tail current threshold being set too high. If your absorption tail current is set at say 4-5% of battery capacity, it'll drop to float prematurely when the panels...
@GemmaFisher82 spent thirty years watching electricians in sub-stations ignore derating tables and then wonder why things melted — bought a Victron SmartSolar 100/30 for my tiny house precisely...
@BoatMark yes, ran almost exactly this on my 40-footer before I added the inverter last spring. The key thing I found with Ekrono in a meter-only config is that it's genuinely quite happy without...
FormerMariner36 in Q&A 1 month ago
Does this actually hold up when the Pi loses power mid-night though? I've had issues on my narrowboat where shore power cuts unexpectedly and corrupts the SD card, which then takes the logging...
@BoatEwan sounds like the classic "BMS hiccup pulls the CAN bus low for a split second and the Multi doesn't know what to do" scenario.
RetiredSquaddie | 312 posts @BevJackson64 With a 560Ah Fogstar bank you've got decent capacity, but the 4pm dip is a consumption and generation cliff simultaneously — double trouble. Worth logging...
@CopperRoamer meanwhile the rest of us are running on edge power like a Fogstar Drift at 2% SOC waiting for the rest of that sentence 🔋 When you do resurface — the MultiPlus 12/3000 is a solid...
FogstarFan in Marine & Boat 1 month ago
@Smithy98 this caught my eye because I noticed exactly the same thing on my narrowboat last winter. Barely drew anything from shore power for weeks, yet the bill told a different story. Turned out...
WattAMess25 in General Chat 1 month ago
Done this on both my garden office and the boat, so can chip in properly. The maths that catches people out: it's not just the watt-hours, it's duty cycle vs ambient temp.
CE_Builds in Q&A 1 month ago
@VDH_Boats interesting one — I've been tempted to do something similar on my boat where I've got legacy AGMs I don't want to bin yet but want to add LiFePO4 capacity alongside them. Quick question...
KangooDream | 203 posts | Joined: Aug 2020 @FormerMechanic "dirty secret" is exactly right 😄 What got me was the phantom loads I'd never thought about before — living in the van you...
Kangoo Dream in General Chat 1 month ago
Hey @OllieRoss74, sounds like a great setup! Just to clarify something that might help — the BMV 712 measures the voltage across its shunt, so the common ground connection is really just giving it...
My Victron setup does mysterious things at 3am and I've genuinely started anthropomorphising it — "what are you thinking?" I mutter at the Cerbo like it owes me an explanation. Seriously...
@LisaStewart71 yeah done something similar on my shepherd's hut setup — Cerbo GX is brilliant for this kind of thing tbh The Node-RED flows on VenusOS can talk to pretty much anything if you're...
@DodgyMechanic and @ExChippie30 — curious what you settled on in the end. I've been running DESS with the "scheduled charges" approach rather than leaning heavily on the consumption...
Lakeland Wanderer in Q&A 1 month ago
Had something weirdly similar on my narrowboat setup a few weeks back — single MultiPlus-II rather than a 3-phase rig, but the principle felt the same.
Boat Ewan in Batteries & BMS 1 month ago
Mixing battery chemistries on a Cerbo GX is something I stumbled into almost by accident on the boat last year, and honestly it's been a rabbit hole ever since. I was running a pair of Victron AGM...
Spent a Saturday afternoon wiring up a salvaged Hotpoint drum motor to a bit of scaffold pole and now my shepherd's hut either makes electricity or sounds like it's auditioning for a horror film —...
OffGrid Hamish in On a Budget 1 month ago