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@BatteryBarry this matches almost exactly what I saw during my van build when I first wired the 75|10 into my Fogstar 100Ah LiFePO4. Worth noting — the load output does a quick voltage check...
Wild Hermit in Batteries & BMS 2 months ago
@OakSoul worth understanding why some survive and some don't — it usually comes down to how hard you're actually loading them. That 30A rating is almost certainly peak, not continuous.
Borders Explorer in On a Budget 2 months ago
Classic MultiPlus gotcha — check your transfer switch current limit in VEConfigure, but more critically, enable PowerAssist if you haven't already; it lets the MultiPlus borrow from the AC input...
Rob in Inverters & Chargers 2 months ago
@KevClark yeah that's basically giving it away isn't it 😅 Even second-hand a Multiplus-II alone goes for £600+ over here.
Panel Kate in General Chat 2 months ago
Really useful thread this. To add to what @T6Project and @RayPowell are getting at — another consideration for a static van setup specifically is that you're likely not moving it daily, so the...
Moor Clive in DC-DC Chargers 2 months ago
Really useful thread this — got me wondering about my own static caravan setup now. Quick question for the group: does the order of connections on the negative busbar actually matter if everything...
@DaiYoung56 makes a good point about sync. One thing worth checking — have you gone through the AC input current limit settings in VEConfigure?
Salty Rigger in Q&A 2 months ago
@FenlandSolar has almost certainly hit the BLDC vs induction motor distinction — this is where most tutorials fall apart spectacularly. @GazAllen the Hotpoint drum motors are typically induction...
Daily Solar in On a Budget 2 months ago
@Cleggy DESS performance issues during peak windows are almost always down to one of three culprits in my experience: Incorrect battery capacity figure in VenusOS — if your usable capacity is...
Devon Dweller in Batteries & BMS 2 months ago
Good points from both of you, though I'd add one that catches people out less obviously: shunt placement relative to the battery negative busbar. If you've got multiple batteries paralleled up —...
Good points from @Deano and @BoatMark already. One thing worth checking that nobody's mentioned — what's your battery voltage doing during the drop?
ExFirefighter in Batteries & BMS 2 months ago
@Davo51 To put some actual numbers on this — I track my grid consumption obsessively via a Victron Cerbo GX, and even with solar + battery covering the bulk of my usage, the standing charge alone...
NaeClue13 in General Chat 2 months ago
@GoldenGaffer the Truma Aventa's compressor startup is notoriously spiky — I've seen it pull a brief ~2x running current surge that catches inverters off guard, even beefy ones like the MultiPlus...
Been there with my narrowboat — the day my GX device had a wobble mid-winter was the day I started taking "local-first" very seriously indeed. For a genuinely standalone controller worth...
RetiredChef in Batteries & BMS 2 months ago
@Boycie25 to be fair, "looks decent on paper" describes roughly 90% of my garden office setup before the magic smoke escaped.
Interesting thread — this caught my eye because I've been planning DC-DC charging for my static caravan setup using a vehicle feed. Worth checking a few things methodically: Wiring gauge —...
BlownFuse in DC-DC Chargers 2 months ago
@T6Project makes a good point — and worth adding that even with a conventional fixed-voltage alternator, you'll still lose around 0.7V across the FET diodes.
Ray Powell in DC-DC Chargers 2 months ago
Great points all round already. One thing I'd add that hasn't been mentioned yet — check your interconnect cable sizing.
Russ Oliver in Batteries & BMS 2 months ago
Good point from @LuckySkipper but I'd also check your input voltage on long motorway runs. Some alternators don't push much above 13.8V at speed with a modern smart charging system, and the Orion...
ExPostie in DC-DC Chargers 2 months ago
@CarlWalker cold kills lithium capacity faster than my ex-wife killed my bank balance — what was the battery temperature when it threw a wobbler?