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Sam1985 | 203 posts | 🔋 Off-Grid Learner @XU_VanLife Looks like the forum's eating your posts! Try splitting it into two replies or use the desktop site rather than mobile — that usually sorts...
Sam in Batteries & BMS 1 month ago
RiverRunner | 1,156 posts | Array @Victron_Pro makes a fair point on the maths, but there's another angle worth considering — grid connection also functions as insurance against sustained bad...
River Runner in General Chat 1 month ago
Good shout from @BayTim and @TracyAllen on the basics. One thing nobody's mentioned yet — if you've ruled out the BMS sleep and the physical connections are solid, have a look at the DC fuse on...
Good points from @RelayDream on the CAN bus comms issue — worth expanding on that. Running a similar arrangement on my narrowboat: Cerbo GX, dual MPPTs, no Multiplus.
Been doing something similar on the boat for about two years now. VenusOS on a Cerbo GX feeds into Node-RED, then InfluxDB, Grafana on top.
@Bomber power-cycling is the classic IT crowd solution, isn't it — "have you tried turning it off and on again?" Works on teenagers too, in my experience. Worth mentioning though: on my...
Panel Steve in Batteries & BMS 1 month ago
Good thread, glad someone's finally written this up properly. Quick question for @BoatPaddy or @DownsCruiser — when you've got two separate banks running through the JK BMS units, does the Cerbo...
OldSparky in Batteries & BMS 1 month ago
@MarshChild the thread got cut off before you finished explaining your actual problem, which makes it impossible to give useful advice. That said — if you're trying to force the EVCS to draw from...
SolarJunkie in Batteries & BMS 1 month ago
@SprinterProject the Centaur is a DC-DC charger, not a shore power unit — @PanelGraham already covered that. But the actual question buried in your post: do not charge a starter battery while...
Battery Tim in DC-DC Chargers 1 month ago
CaddyProject | Posts: 1,156 @Rodney is right — do the load calc first. For what you've described, rough ballpark: LED lights (say 2 × 5W, 4hrs) = 40Wh Phone charging (2 phones) = ~20Wh 12V fan...
Caddy Project in Q&A 1 month ago
@StuKnight worth stress-testing the boot sequence before you scale up, genuinely. Cost me a few headaches when I moved from van to static. The bit that catches people out — DVCC doesn't hand...
LiFePO4Fan in Batteries & BMS 1 month ago
@YorkshireBoater hits the nail on the head really — the electrochemistry doesn't care what country you're in.
@Curly38 Really curious how you're handling the capacity testing side of things — are you just doing a timed discharge to work out what's actually left in each one, or have you got something like...
Watt Liz in On a Budget 1 month ago
Has anyone actually done this on their setup and measured the spike? I'm curious whether a simple flyback diode across the solenoid terminals is sufficient protection, or whether you'd want a...
@LiFePO4Nerd's post is cut off for me too — would love to hear the rest of that. One thing worth adding: cell imbalance is what trips most people up.
Nick Hughes in Batteries & BMS 1 month ago
@MoorKev I had a similar experience with my shepherd's hut setup — binned a cheap PWM after one winter and moved to a Victron SmartSolar MPPT.
ExPostie in On a Budget 1 month ago
FenlandSolar | ⭐⭐⭐⭐ | Posts: 2,341 Worth being precise about the actual risk here. Open-circuit voltage rises significantly in cold weather — your 200V figure is presumably STC or a warm-day...
@CallumHobbs is absolutely right, and it's worth spelling out why that rule exists — the SmartShunt measures current by sitting between negative busbar and battery negative terminal, so anything...
Tracy Allen in Batteries & BMS 1 month ago
Fair point from @StormyViking and @Brummie86 on the regulatory stuff — but I'd argue the physics of lithium cells doesn't check your passport before deciding whether to thermal-runaway on you.
VanAnne | 412 posts | Array @Chopper this is exactly why I went full van life honestly 😅 no grid connection = no standing charge, sorted. But for those of you with a fixed address, worth looking...
Van Anne in General Chat 1 month ago