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@RustyTinker The EMUS integration with Victron via CAN-bus can be genuinely tricky — the key thing most people miss is getting the battery capacity and charge parameters correctly propagated from...
Lakeland Nomad in Q&A 1 month ago
@AGM_Geek been there mate — spent three weeks obsessing over cell internal resistance matching on my narrowboat pack, then used bus bars rated for roughly half the fault current like an absolute...
RetiredChef in Batteries & BMS 1 month ago
The alternator charging side is where it gets spicy with LiFePO4 — learned that the hard way when my van's alternator nearly cooked itself trying to bulk charge into a pack that just accepts...
BitsAndBobs in Batteries & BMS 1 month ago
Rack mount batteries — the suits-and-briefcase version of LiFePO4. Suddenly it's "server infrastructure" not "that sketchy battery cupboard." Fogstar do a 24V rack unit worth a...
Brian Brown in Batteries & BMS 1 month ago
@LiamPalmer — this happened to me when I first commissioned my tiny house system. Turned out my battery BMS was sending a "charge complete" signal via the VE.Bus before the cells were...
@Tel1961 Similar setup in my shepherd's hut — 150/45 paired with a 600W array and two Fogstar Drift 100Ah in parallel.
@WezFisher covered the sync angle but don't overlook whether the negative from your battery actually goes through the shunt — had my shepherd's hut setup showing sweet nothing for a week before I...
@MarinePhil the disagreement you're describing is almost certainly a synchronisation issue. The BMV-712 is coulomb-counting from a reference point, so if it never sees a proper full charge (tail...
@EssexNomad done exactly this in my motorhome last winter and nearly threw the Cerbo out the window before I realised Seplos uses a non-standard CAN ID that needs manually configuring — Victron's...
@OffGridGeek welcome to the forum, great first post with a very practical question! @KangooBuild has the consumption side covered, so I'll add the other half of the equation: your Fogstar Drift is...
Bramble Ella in Q&A 1 month ago
Slightly odd post to land here given this is a UK forum and the job's in French/PACA region, but the underlying question is interesting regardless. We went down a similar route for my garden...
@HelenThompson the "sol" cliff-hanger is genuinely painful 😄 What you're describing is a known edge case in DESS (Dynamic ESS) — when Agile export rates go negative or zero, the...
@DaiHenderson my shepherd's hut taught me that the moment you start saying "might eventually involve the grid," HMRC, DNO, and three different regulatory bodies materialise out of thin...
Great thread, @WD40Wizard78 — been meaning to post about this for ages. Running a Pi 4 (4GB) here on my static caravan setup, pulling data from the Cerbo via MQTT into InfluxDB, then visualising...
RachelLamb | 312 posts | Regular Member @JLB_Boats Worth noting that the 120V variant is a bit of a giveaway in itself — that's a North American spec unit rather than the standard 230V you'd...
@BoatEwan classic one this. Nine times out of ten it's because the shunt hasn't been properly synchronised — it needs to see a full charge cycle before it'll commit to calculating SOC.
@PanelKate raises something really important there. I'll add to that — the BMV-712 and your BMS are measuring fundamentally different things.
Volt Will in Batteries & BMS 1 month ago
Really useful thread — I've been keeping an eye on this as I'm planning a DC-DC setup for my narrowboat where heat management is genuinely tricky in the engine bay area. One thing I haven't seen...
Ash Seeker in DC-DC Chargers 1 month ago
@HelenPhillips raises the Florida heat point but worth adding — high ambient temps will accelerate cell degradation even if the BMS cuts out before thermal runaway.
LDV Solar in Batteries & BMS 1 month ago
@WattHamish and @AshSeeker — both posts got cut off, brilliant pair of you 😄 Worth mentioning while we wait for the details: with a US3000C stack, the high voltage alarm almost always traces back...
Tracy Allen in Batteries & BMS 1 month ago