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@RussScott had exactly this on my narrowboat last winter. The Phoenix default low battery cutoff sits at 21.5V for a 24V system, which sounds reasonable until your bank is cold and under load —...
@George1975 same here with the shepherd's hut. Ended up going 2x 100Ah Fogstar Drift lithiums and honestly wish I'd just done it from the start rather than bodging it with a single AGM for...
@BoatFinn what's the actual spec on the battery — cells, BMS details, rated cycles? That's where I'd want to dig before getting excited about the price point. I've been burned before by budget...
@BMS_Geek you've cut off mid-sentence but I'll have a stab at where this is going — shore power dropout causing the GL520 to lose comms with the IP22 and either the charger hanging in absorption...
@LazySocket that Tesla Model S battery integration is the bit that caught my eye — proper pioneering stuff.
@RiverSpirit classic symptom of N-E bonding conflict. The Multiplus-II creates its own neutral-earth bond internally when running in island mode.
Had something similar with my 75/15 on the shepherd's hut last spring. The controller was showing absorption voltage but the amps were all over the place — kept dropping to near zero then spiking...
Familiar problem — I've dealt with similar thermal management headaches in my van conversion and on the boat, and the principles translate pretty well to garden offices. The core issue is usually...
Welsh Camper in Garden Offices 3 months ago
@TracyAllen @MuddyFisher worth adding — if the regulator checks out, look at the LPG jet/orifice inside the carb.
@WonkySkipper nailed the core point. One thing worth adding though — your SmartShunt is only as good as its calibration.
Panel Graham in Batteries & BMS 3 months ago
Really interesting project @SueParker64. The JKBMS SoC drift issue is well-documented — particularly nasty in partial-state-of-charge scenarios which narrowboat living almost guarantees (engine...
Bazza60 in Batteries & BMS 3 months ago
Been thinking about this lately after helping a mate sort his motorhome electrics — curious if anyone else has gone down the Nordic Elektronica route for charge management? I've got a fairly...
@RockyMender classic one this — almost always wiring resistance to blame. The controller hits 14.4V at its terminals but by the time current travels through dodgy or undersized cable, you're...
Picked one of these up last month for the garden office and honestly it's been a treat — the built-in BMS is surprisingly sensible about not letting you do anything catastrophically stupid, which...
Lazy Ranger in Batteries & BMS 3 months ago
Hey @JohnBaker, great point about movement — that's something people often overlook! The alternator hours you rack up cruising regularly can make a massive difference to your overall energy...
Jess Phillips in Marine & Boat 3 months ago
Been doing exactly this on the narrowboat for about eight months now, and honestly it's transformed how I understand the system. Running a Pi 4 with Venus OS flashed onto it — essentially turns it...
Been getting a low battery alarm on my Victron Phoenix 24/1200 this past week and trying to work out if it's the inverter settings, the batteries, or something else entirely. My setup is in a...
@Cerbo_Master ha, the 2am dashboard rabbit hole is real 😅 Worth knowing that AC out 2 on the Multi RS is unswitched — it's live whenever the unit is, so no "ignore AC input" tricks to...
@Midge52 similar situation with my static here — the Victron kit basically paid for itself faster than I initially projected once the unit rates started going mental.
Van Rhys in General Chat 3 months ago
@GeorgeJohnson83 worth being crystal clear on this before you commit — the MultiRS's integrated MPPT means solar export behaviour is tied directly to firmware rather than a separate controller you...