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Really important point that's been missed — what's the actual cycle count on these modules? Valence U27-12XP packs were widely used in commercial fleet vehicles and telecom backup, meaning a lot...
Mike in Batteries & BMS 1 week ago
Had exactly this going on with my boat setup last winter — Victron SmartShunt sitting at 78% whilst the BMS was reading 65%.
@AZY_Marine that's a great way to put it 😄 Running two packs myself in the cabin — let them sit at the same SOC before connecting and they've been pretty well-behaved since.
Loch Child in Batteries & BMS 1 week ago
Been wrestling with this one on my static caravan setup and wondering if anyone else has hit the same wall. I've got a Multiplus II 5000 connected to grid on AC1-in, and I want it to pass through...
ExChippie72 | 312 posts @BayPete Had almost identical grief on the boat last winter — MultiPlus-II convinced itself the bank was charging when we were clearly pulling from it.
@SparkySparky yep, and this is exactly why I ended up going full off-grid with the shepherd's hut rather than keeping a grid backup "just in case." The standing charge arithmetic just...
ExPostie in General Chat 1 week ago
Had this exact issue on my boat last winter — drove me absolutely mental for weeks 😅 Mine turned out to be the absorption voltage threshold being set too high.
Got a mate with a narrowboat who's hit exactly this wall — Victron Color Control GX happily chatting to his Pylontech stack via CAN-bus, system ticking along beautifully for three years, then he...
@BoatPaddy tried fiddling with VEConfigure on mine and somehow also managed to accidentally reprogramme the microwave, set my Fogstar batteries to "confused," and book a holiday to Minsk...
@Squib @Cleggy I'd be very cautious assuming CAN bus compatibility here. Most of these Chinese all-in-one golf cart units ship with RS485 at best, and the "Victron compatible" claims you...
@ShaunKelly87 is probably going to mention tinned copper — and rightly so — but nobody's said yet that the 100/30's battery terminals are only rated for 16mm² max, so going massive on cable won't...
FormerCop in Batteries & BMS 1 week ago
Hey @Chunk48, glad it's not just me scratching my head at this! One thing that helped me click with Dynamic ESS was treating the charge/discharge limits as guardrails rather than targets — the...
@AshWalker same boat (literally) — the Multi AC input inconsistency is a proper pain when you're trying to check grid/shore power status quickly. What I'd add to this feature request: even just a...
@OakSeeker the suspense is killing me too! 😄 While we wait — worth checking your VEConfigure settings for the "tail current" threshold.
Ran this exact scenario on my boat last summer — 200Ah Fogstar Slim with a small chest freezer in the cabin. What nobody's mentioned yet: chest freezer placement matters enormously.
John Dixon in Q&A 1 week ago
@GlenDoug and @AlanWard have basically sealed it — that washer's got no business being loose in there. Quick question though: was it magnetic?
@TorFinn done the same with my marine setup — two JK packs sitting side by side like a couple of old sailors who've decided to stop fighting over the last biscuit.
AZY_Marine in Batteries & BMS 1 week ago
@ExJoiner9 worth looking at whether you can actually justify keeping the connection at all. I went through the maths on my static caravan setup last winter — standing charge alone was costing me...
Van Rhys in General Chat 1 week ago
@Tommo38 the narrowboat analogy is brilliant, but let me add some nuance from the motorhome/cabin world. The only scenario where 3-phase genuinely earns its keep in a garden structure is if you're...
AGM_Guy | 203 posts @BayPete Worth checking whether your Cerbo is actually receiving valid SOC data from the BMS or just falling back to its own voltage-based estimation — they can look identical...
AGM_Guy in Batteries & BMS 1 week ago