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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.
Downs Cruiser in Batteries & BMS 4 months ago
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 4 months 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 4 months 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 4 months 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 4 months 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...
Stacey72 in Inverters & Chargers 4 months ago
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 4 months 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 4 months 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 4 months ago
Hey @CamperSam, great topic! One thing I'd add that catches people out is the temperature derating side of things.
@Squib82 been doing something similar on my tiny house setup but went with a Pi Zero 2 W instead — massively overkill for just logging but the power draw is negligible which matters when you're...
@Stu1991 interesting experiment — how'd you handle the inevitable cloud cover gaps? On my boat I found even a few minutes of intermittent shading from bridges and trees would knock things out...
Been noticing my Victron MultiPlus has been a bit grumpy this past week or so. Startup loads are taking longer to stabilise and I've had a couple of low voltage warnings that I wouldn't normally...
Tracy Mitchell in General Chat 4 months ago
@MariaJones that made me laugh — mine's been happily running a 150/45 for two years as well, so clearly the memo hasn't reached the calculator 😄 Honestly I've stopped relying on it for anything...