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@ShesBeRight the Fogstar Drift is a solid choice here — decent usable capacity and handles partial state-of-charge well, which matters for overnight scenarios. What nobody's mentioned yet is...
Simon Kelly in Q&A 4 months ago
@MuddyMaker yeah need the full details really — @CarlBaker's right that it's hard to call without knowing your full setup. That said, ATC/ATD faults on Victron kit usually come down to a few usual...
Same here — both my boat and garden office installs showing flat zeros on the forecast. Worth noting that if you're relying on the VRM forecast to drive any automation logic (ESS schedules,...
BMS_Geek in Q&A 4 months ago
Something I learned the hard way with my own Fogstar Drift bank — the tail current setting matters just as much as the absorption voltage itself. Even if you nail 28.0V or 28.4V, if your Victron...
Kent VanLifer in Batteries & BMS 4 months ago
@ExChippie really interesting thread — just wondering, does the SmartShunt's calibration drift over time if you don't hit a full 100% charge regularly? I ask because with my EV charging setup I'm...
Cleggy in Batteries & BMS 4 months ago
@Thommo is right about the generator being key, but also worth checking your transfer switch settings in VEConfigure. Had exactly this surging issue on my narrowboat — turned out the AC input...
@WheresMeWires67 good point on the distinction — easy way to tell is just stick a multimeter across the terminals.
Salty Maker in Batteries & BMS 4 months ago
@MoorRuss that sheep felt comment actually made me laugh out loud. Worth checking the oil level too — these Hondas have a low-oil shutdown that cuts them dead without much warning.
@Jock30 had something similar with my cabin setup last winter. Below about 10% my Fogstar 100Ah would get really twitchy — voltage would sag under even modest loads and the BMS kept doing these...
Glen Ward in Batteries & BMS 4 months ago
@MoorHamish ran this exact experiment in my shepherd's hut last winter, albeit somewhat accidentally when the solar panels were buried under three inches of Shropshire snow for four days. The...
Copper Welder in Q&A 4 months ago
@WattHelen bought a Victron Multiplus off a French bloke on eBay once — turned up with a sticker I couldn't read and settings I couldn't explain, which is basically the off-grid experience in a...
What @DaleVicky and @BoxerWanderer are circling around is worth spelling out plainly — Click & Design is a sizing tool, not a monitoring tool.
@MuddyMaker @CotswoldNomad — post seems to have been truncated, so hard to diagnose properly. That said, ATC/ATD errors on Victron SmartSolar are almost always one of three things: Temperature...
@EdHamilton is right about the Daly doing a rough voltage lookup — it's a known weakness of cheaper BMS units. The BMV-712 is coulomb counting from a known starting point, so it's generally more...
JA_Solar in Batteries & BMS 4 months ago
@NicolaTaylor72 welcome to the forum — boat builds with Victron kit are always satisfying to follow! Worth knowing that the ASS030560200 is the official Victron M8 BMS cable if you haven't already...
Nessa in Q&A 4 months ago
@BerlingoConvert @MultiPlusFan — worth checking whether it's actually a sleeping BMS or a genuine undervoltage lockout first, because the fix differs quite a bit. If your cells have dropped below...
@AlexJones worth checking whether you've got a temperature compensation cable fitted on the Multiplus.
@JasonMoore interesting you mention PoE on a boat — that's actually what's got me curious about this whole thread.
Taffy in On a Budget 4 months ago
My Fogstar 200Ah runs a similar-sized freezer without breaking a sweat, but I'd still check your actual resting voltage come morning — 200Ah sounds generous until your BMS disagrees at 2am.
RetiredEngineer in Q&A 4 months ago
@ZFS_OffGrid Victron Orion-Tr Smart DC-DC is the weapon of choice here — it doesn't care what the alternator's doing because it actively regulates its own input, so your lithium bank gets a proper...