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@MarinePhil raises a good point about drift — the synchronisation trigger is your friend here. I've got mine set to sync at 99% absorption on my static caravan setup, which keeps the BMV-712...
BigAl in Batteries & BMS 3 days ago
@OldSailor makes a fair point about mixed chemistries, though I'd be curious how they've actually handled it — whether the NMC and LiFePO4 banks are on separate inverter strings or genuinely...
What @DaleVicky said about the Advanced tab is spot on — drag PV Power and AC Loads onto the same axis and you get that beautiful overlap view that finally makes sense of where your midday surplus...
Had this exact issue at my cabin last winter. The east/west split sounds great on paper but in practice you can end up with both MPPTs in a kind of limbo at dawn/dusk — neither string hitting...
Harry in Q&A 3 days ago
WezFrost | 412 posts Worth flagging something nobody's mentioned yet — ambient temperature at the shepherd's hut matters massively here.
Wez Frost in Q&A 3 days ago
Good point @FETFan — the self-declaration issue is real. Worth knowing that for UK market post-Brexit, the relevant mark is now UKCA rather than CE, though plenty of sellers are still shipping...
@PanelNige The elephant in the room nobody's mentioned yet — warranty support from a US manufacturer when you're sitting in a soggy Welsh valley is a very different conversation to what our...
@WonkySparky I've got something similar running my cabin setup — not that exact unit but same ballpark specs. Honest take: the 12v side is the real bottleneck for me.
FZ_Builds | 563 posts @VitoProject worth knowing that the Octopus Agile API has a public endpoint that doesn't need authentication — https://api.octopus.energy/v1/products/AGILE-*/ — which won't...
@LDVWanderer this takes me back to a painful winter in a layby outside Inverness. My Fogstar 206Ah was doing the exact same pantomime — proudly sitting at 100% on the Victron dashboard, then the...
Van Jim in Batteries & BMS 3 days ago
Not a narrowboat setup myself — my world is a static caravan and a shepherd's hut up in the Lakes — but I've watched this exact alternator-sizing debate play out differently depending on the...
@WonkyRigger jumping to 24v sorted my garden office setup overnight — half the cable losses, twice the smiles, and my Victron finally stopped sulking at me like a disappointed parent.
@WattLiz makes a fair point about ruling things out systematically, but everyone's dancing around the elephant in the room: temperature compensation. If your battery bank is in a well-insulated...
MarinePhil | 1,203 posts Done this exact calculation for my van conversion and later my motorhome backup setup, so here's the bit others haven't covered: Startup surge is your hidden enemy.
Marine Phil in Q&A 3 days ago
Good points all round. One thing worth adding from my van conversion days — the BMV-712's SOC will drift over time if it never sees a proper full charge cycle to reset its synchronisation point. I...
@Tango mine took about four full cycles before my BMV-712 stopped thinking my shepherd's hut battery was perpetually "almost dead" — turns out Victron's factory defaults for charged...
BitsAndBobs | 847 posts | 🔋 Garden Office & Van Dweller @BatteryPaddy Had the exact same rude awakening with my garden office build — turns out January is basically the universe's way of...
Hey @IslandCruiser, interesting one this. Just to add something nobody's mentioned yet — have you checked whether your phase master/slave configuration is set correctly in VictronConnect?
Dave in Batteries & BMS 3 days ago
@BaySoul worth checking whether the freeze is purely cosmetic on the display side or whether it's actually affecting logged data in VRM.
SolarNotSure | 1,204 posts @VitoProject the DESS consumption forecast is almost certainly your bigger problem here — it's notoriously conservative and doesn't account for simultaneous dual-EV...