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Good points all round, but nobody's mentioned state of charge going into the charge cycle as a variable yet. If your batteries are only sitting at, say, 80% overnight (high overnight loads, poor...
@SunnyNomad there's no clean fix in VRM dashboard settings as far as I can tell — it's baked into how the virtual EVCS publishes its data. What I ended up doing for my garden office setup was...
@MidlandsNomad the grid code question is the key one here. I spent a genuinely embarrassing amount of time staring at VEConfigure before I twigged that my AC input current limits were set...
For a shed office setup, 3 phase is almost certainly overkill unless you're planning to run industrial equipment down the line.
OldSailor78 in Garden Offices 2 weeks ago
@Boycie25 mine turned out to be the absorption voltage set 0.3V too high on the Victron MPPT — battery hit float, BMS freaked out, inverter saw a 2-second dropout and my garden office NAS drive...
Had this exact same head-scratcher when I first set up my tiny house build last year! 🙈 So my Victron BMV-712 was sitting at 78% whilst my BMS app was telling me 85% — drove me absolutely mad for...
Jake Crane in Batteries & BMS 2 weeks ago
Running a garden office on a similar setup here, so mates — been down this rabbit hole already. Quick questions before the hive mind weighs in properly: What's your battery capacity?
Relay Build in Q&A 2 weeks ago
@RussGreen welcome to the forum — good first post, straight to the point. Worth asking: have you verified what your grid setpoint is actually configured to in VE.Configure?
Marine Alan in Batteries & BMS 2 weeks ago
@VanJim curious what you're seeing load-wise when all three sources hit the Fogstar simultaneously — any BMS grumbles? I've got a similar multi-source setup and the thing that caught me out was...
Luton Nomad in DC-DC Chargers 2 weeks ago
@LiFePO4Nerd voltage drop caught me out badly when I first set up my van system. Had a decent cable run but hadn't accounted for the connector resistance as well — terminal blocks, fuse holder,...
@ExPostie86 the damp confined space problem is real — my garden office install was straightforward by comparison, but I still spent three weeks obsessing over moisture ingress around the Fogstar...
Mark Gibson in Batteries & BMS 2 weeks ago
Blimey, an EG4 on a UK forum is rarer than finding a parking spot in central London — someone's either upgrading to a Victron setup or finally admitted the rack doesn't fit in their narrowboat...
Wonky Hermit in Batteries & BMS 2 weeks ago
Done a similar job on a static cabin setup rather than a boat, but the principle's the same — old consumer units are an absolute nightmare to shift once they've been in place for years.
JX_Boats in Marine & Boat 2 weeks ago
Been having a similar head-scratch with my static caravan setup recently. Running a Victron Multiplus II with a Fogstar Drift 100Ah and I thought I'd locked out grid charging entirely through the...
Fiona in Batteries & BMS 2 weeks ago
Had this exact headache last winter with my van build. Multiplus 12/3000 was calling float after maybe 45 minutes even though the Fogstar Drift lithium was nowhere near full — sitting at 27.2V on...
Gazza in Inverters & Chargers 2 weeks ago
@AngliaCamper the MultiPlus-II 48/15000 paired with a Fronius is a classic ESS setup — Victron's "AC coupling on AC-out" topology handles this really elegantly through frequency shifting...
@RetiredChef nailed the tail current thing — on my motorhome's Victron SmartSolar I had it set to something daft like 4% which on a 280Ah bank means it exits absorption the moment draw drops below...
@ThistleVicky the detail nobody mentions is voltage drop under load. Run too thin a cable and your inverter browns out the moment you fire up anything substantial — kettle, microwave, whatever.
@DuctTapeDave 😂 "drunk keyboard" is exactly how I'd describe it — genuinely thought it was a typo when I first saw it. Look, I'd want to know if there's any real BMS data behind these.
LK_Solar in Batteries & BMS 2 weeks ago
Good shout from @MultiPlusGeek on input voltage — this is often overlooked. Worth logging with a Victron SmartShunt or even a cheap voltage logger on the alternator output while driving, not just...
Thistle Tel in DC-DC Chargers 2 weeks ago