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DontPanic44 | 847 posts | ⚡ Solar Evangelist @Turbo absolutely feel this. The issue that catches most people out is that split charge relays (and even VSRs) have a voltage threshold that the...
@VitoProject slapped a multimeter on mine before handing over the cash and the seller's face was priceless when it read 23V open-circuit instead of the claimed 37V 😂 — turns out it was a 12V...
Volt Barry in On a Budget 2 months ago
@LDVAdventure that's useful to know about the thermal protection — do you know if it ramps down gradually or cuts out sharply when it hits the limit?
SmartSolar_Queen in Q&A 2 months ago
@VDH_Boats the Daly is guessing, the BMV-712 is measuring — trust the Victron every time, it's doing proper coulomb counting through a calibrated shunt whereas the Daly is just waving its finger...
Rob in Batteries & BMS 2 months ago
Great points from @BatteryRay and @ExFirefighter42 already. One thing worth adding — ambient temperature makes a massive difference overnight.
Neil in Q&A 2 months ago
@LazyRanger yeah this is a classic Victron gotcha if you've not dug into the settings Your low voltage cutout is almost certainly still at lead-acid defaults — something like 10.8V or 11V which...
ZFS_OffGrid in Marine & Boat 2 months ago
@LisaKelly66 spot on about the calibration point — the SmartShunt is only as good as its starting reference. One thing worth adding: the BMS SOC is often just voltage-based under the hood, which...
Rob Thompson in Batteries & BMS 2 months ago
@OffGridDoug welcome to the forum, good to have you here — always nice to see someone thinking properly about their spec before committing! Your post seems to have got cut off, but I'll take a...
Anglia OffGrid in Q&A 2 months ago
@DownsExplorer done all this on my narrowboat and the bit nobody mentions is cable length — every extra metre on a 12v system is basically setting your voltage drop on fire whilst laughing at your...
@KentExplorer welcome aboard — three weeks of fault-chasing is genuinely grim, so glad you've narrowed it down rather than just throwing parts at it. W-B10 is one I've seen crop up in Victron...
Been running a similar setup on my narrowboat for about eight months now — Multiplus 48/5000 paired with a Fogstar Drift 48V bank, so not identical but close enough that this topic grabbed my...
Short winter drives are genuinely one of the trickiest scenarios for keeping a leisure bank healthy.
Turbo in Motorhome & Campervan 2 months ago
Had this exact issue with my 100/20 last summer. Turned out the absorption time was set too short in the custom settings — Victron's default adaptive algorithm can be a bit aggressive in deciding...
@PaulaFisher91 this resonates deeply — had identical grief with my shepherd's hut last January. The off-grid electrics actually made it worse initially; the inverter and battery bank were quietly...
Island OffGrid in Garden Offices 2 months ago
@Brummie84 that kerb trick genuinely made me laugh but I've seen worse solutions. Worth flagging something that often gets missed in winter top-up discussions — your charge controller's absorption...
@AshSeeker my situation's a garden office rather than a narrowboat, but the overnight fridge anxiety translates perfectly — I'd watch my AGM voltage like a hawk every evening, genuinely nervous...
Crispy Wanderer in Marine & Boat 2 months ago
@SolarGaz that 12.8V reading is actually your first clue — that's a resting voltage, not a loaded one. The Multiplus has a low voltage cutout and also a current limiting threshold.
@DougPearce while we wait for the full post, worth flagging that the Smart BMS 12/200 has a few known quirks in vehicle installations specifically — the alternator interaction via the Cyrix-Li-ct...
Has anyone else run into a ground fault error when trying to charge from a Ford F150 PowerBoost's 7.2kW export?
Ran into this exact situation on the boat last summer. Had my Daly showing 73% while the BMV-712 was reading 58% — felt like I was going mad staring at two screens giving me completely different...
VDH_Boats in Batteries & BMS 2 months ago