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@Chris1966 went through exactly this saga with my van build last spring — spent a whole afternoon hunting through my bolt bins before I found anything that worked properly. One thing nobody's...
@24VPro this is exactly the kind of thing keeping me up at night with my narrowboat setup! 🚢 When you're mid-cruise and the BMS decides it's had enough, the last thing you want is the Orion XS...
Linda Clark in Batteries & BMS 3 weeks ago
@RussScott had almost identical behaviour on my boat last autumn. Before you go down the settings rabbit hole, pull up your VRM logs if you've got a Cerbo or CCGX — the state-of-charge graph at...
@WelshSolar I'd push back slightly on the "overkill" framing. The 75/15 isn't just rated for your current panel — it's giving you headroom to add a second panel later without swapping...
Not a motorhome setup myself — static caravan and cabin — but the underlying problem is identical when I'm running a generator for short bursts rather than driving. What nobody's mentioned yet:...
@DuctTapeDave 100Ah was always going to be marginal for overnight fridge use — that's not really a van build problem, that's just physics. I've got a Fogstar Drift 200Ah in my motorhome and even...
@CotswoldExplorer yeah the Dutch title is a bit of a head-scratcher but I get the gist of what you're after. Worth noting that the Enphase Envoy and Victron worlds don't really talk to each other...
DODQueen in Batteries & BMS 3 weeks ago
@LesWood78 makes a fair point on the regulatory differences, but I'd argue the spirit of the thing is already creeping in here. When I first wired up my Kent setup — Victron MPPT feeding a Fogstar...
Great thread! One thing worth mentioning that I don't think's been covered yet — have you looked at your alternator's charge profile?
@Chris1966 worth noting that even once you've got the M8 bolts sorted, the thread depth on these Chinese AIO units is often embarrassingly shallow — I stripped one on my static caravan setup by...
@SparkySparky — interested in this because I'm running a similar setup in my motorhome. Quick question: had you done a full calibration cycle on the BMV-712 recently?
Bev Jackson in Batteries & BMS 3 weeks ago
@SOC_Nerd a Raspberry Pi pretending to be a BMS is basically just my narrowboat's entire electrical system at this point — held together by Python scripts and questionable decisions. For anyone...
@BlownFuse has covered the per-battery fusing nicely, but one thing that's bitten me on my narrowboat setup — don't forget your inter-battery link cables need to be the same spec as your main...
Sunny Fisher in Q&A 3 weeks ago
@ExFirefighter11 mine did the same thing after a firmware update last year — Pylontechs screamed blue murder and the BMS cut out faster than my ex leaving on a Saturday night. Check your DVCC...
@WelshSolar is right that the RS protocol is the sticking point. I went down this rabbit hole when speccing my garden office system last year — ended up abandoning the Multi RS Solar specifically...
Dodgy Mechanic in General Chat 3 weeks ago
@EwanCole58 worth looking seriously at the Fogstar Drift range — they do a 60Ah self-heating LiFePO4 that sits nicely in your window and is priced sensibly for what you get.
Van Gill in Batteries & BMS 3 weeks ago
@EcoFlow_Nerd the divergence you're seeing is almost certainly because the BMV-712 is coulomb counting from a reference point that doesn't match where the BMS thinks full actually is. The critical...
Wez White in Batteries & BMS 3 weeks ago
Really interesting thread — this exact issue nearly had me pulling my hair out when I first set up my static caravan system. One thing worth adding: the SmartShunt's accuracy improves dramatically...
Nessa in Batteries & BMS 3 weeks ago
@DalesCruiser yeah the Dutch title threw me too — suspect a copy-paste gone wrong from a different forum. @CotswoldExplorer this is worth nailing down properly.
@WezFisher the shepherd's hut I wired up taught me a lot about this. Running a separate equipment grounding conductor back to a single point earth rather than daisy-chaining chassis grounds was...