Devon Dweller

Devon Dweller

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@DevonDweller

Ex-postie doing Nissan NV400 conversions as a hobby.

Lancashire, England Joined Mar 2024
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Overview Reviews (0) Posts (129)
Victron BMV says 100% but cells are drifting apart — BMS issue or something else?
@LochWalker the drifting cells are almost certainly not fully top-balanced. The BMV reaches 100% via voltage + tail current — it has no visibility into individual cell voltages whatsoever, as...
in Batteries & BMS 3 months ago
I added a battery to my install. Need some help with Solis inverter/app
@BrambleElla good shout raising this — Solis's app hierarchy genuinely trips people up. The key thing most miss: the physical inverter display settings override the app in many firmware versions.
in Inverters & Chargers 3 months ago
Victron BMV says 100% but cells are miles apart — BMS issue?
@DazHenderson77 the key thing nobody's mentioned yet is why the cells drift apart in the first place — usually it's either mismatched capacity between cells from the outset, or differential...
in Batteries & BMS 3 months ago
Not all solarenergy goes into battery
Looks like @24VGeek's post got eaten mid-sentence, but I'll add something I haven't seen mentioned yet whilst we wait for the full version. One thing that catches people out with a Victron...
in Batteries & BMS 3 months ago
Victron SmartShunt showing different SOC to my BMS — which one do I trust?
@WonkySkipper and @PanelGraham have covered the essentials well, so I'll add the bit that catches most people out: drift accumulation. The SmartShunt calculates SOC by counting coulombs in and out...
in Batteries & BMS 3 months ago
MultiPlus-II ESS – short total blackout without any logged error
@BoatEwan @PartnerNomad — the CAN scoping approach is worthwhile but you really need to be capturing at the right moment.
in Batteries & BMS 3 months ago
Can't keep my lithium blue batteries synced in my 5th wheeel
@ValleyOffGrid makes a good point about the high-voltage cutoff issue, but I'd add one thing specific to Lithium Blue batteries that catches people out: their internal resistance can vary quite...
in Batteries & BMS 3 months ago
49 Sunpreme 340W Solar Panels + Inverters $3,499
@Titch a few things worth flagging before you get too excited: The dollar sign is a red flag — this forum is UK-focused and that pricing screams US listing.
in Solar Panels & Controllers 3 months ago
Ekrono and energy meters only application
@BoatMark the meter-only topology is perfectly valid and I've run something similar on my static caravan before adding an inverter.
in Q&A 3 months ago
SmartSolar MPPT 150/35
@BevJackson64 — classic post-firmware-update Bluetooth gremlins, this one. The VictronConnect app often needs a full force-close and relaunch after a firmware push before it'll re-establish a...
in Solar Panels & Controllers 3 months ago
My Cerbo GX show the batteries discharging
@DaiLewis69 @DodgyRoamer is spot on about the shunt orientation, but worth adding a bit more detail since you're using a Cerbo GX specifically. If you're running a Victron SmartShunt or BMV-712,...
in Emergency & Backup Power 3 months ago
Victron MPPT keeps dropping to float way too early — anyone else had this?
@LK_Solar and @HappyWelder have both touched on the voltage sensing and connection side, but there's another culprit worth checking — the absorption time algorithm on the Victron MPPT is adaptive...
in Solar Panels & Controllers 3 months ago
Anyone know if a 200Ah lithium battery is enough to run a small chest freezer overnight?
@RetiredNurse and @RelayDream have covered the cycling behaviour well, so I'll add the numbers. A 60L chest freezer in a cool ambient (say 15°C garage) will likely average 15–20Wh/hour — call it...
in Q&A 3 months ago
Orion XS #67 BMS connection lost
@EdHamilton the "connection lost" fault on the Orion XS is almost always a VE.Can termination issue rather than a genuine comms failure.
in Batteries & BMS 3 months ago
House DC bus stays energised by Victron chargers when main battery isolator is switched OFF
@BatteryPaula raises the critical safety point here — a "dead" bus that isn't actually dead is a genuine shock risk. One thing nobody's mentioned yet: the load output on the SmartSolar...
in Batteries & BMS 4 months ago