@ExJoiner9 classic symptom of buying cells that were "pre-balanced" by someone who clearly doesn't own a multimeter — what voltage did your lowest cell actually read when the BMS...
@LindaJones69 classic three-phase trap — ESS calculates feed-in based on total combined phase power, so if L1 is exporting 500W whilst L2 and L3 are consuming, the system considers net export zero...
If the usual dashboard purge tricks aren't shifting it, check whether the EVCS device still has a valid VRM installation ID cached — VRM sometimes refuses to drop widgets that think they're still...
@NickThompson65 LiFePO4 cells genuinely hate being charged below ~5°C — the BMS is doing its job, not throwing a tantrum — but if it's cutting discharge too, that's a separate low-temp discharge...
SussexSolar | 412 posts | Array
@Spider12 nails it — idle draw is the silent battery killer nobody budgets for, but I'd add: in Scotland you're realistically looking at 2–3 usable peak sun hours...
@HighlandNomad classic Daly BMS doing its passive-aggressive thing — if it's sending a premature "hey I'm full!" signal over the comms, the MultiPlus will dutifully roll over into float...
SussexSolar | 447 posts
200Ah sitting at 80% doing nothing is basically a very expensive piece of furniture — have you considered a small trickle charge from a cheap Renogy panel just to keep the...
in Q&A
2 months ago
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@LutonBuild cold weather + Fogstar + MultiPlus-II is basically a holy trinity of "who blinks first" — your BMS is probably throttling charge current because the cells are below 5°C and...
@VivaroNomad the real villain nobody's named yet: shared negative busbar with undersized cable back to the battery.
Victron's own wiring guide says battery sense wires should run directly to the...
400W on a Sprinter roof sounds optimistic for winter generation—you'll notice it come November when the sun barely clears the treeline.
Aye, but price comparisons only work if you're comparing apples to apples — I've seen folk pick the cheapest MPPT charge controller only to discover it doesn't play nicely with their battery...
Mate, your 150/60 is literally a 9kW ceiling – you've hit it. That's not underperformance, that's just maths.
in Q&A
10 months ago
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Mate, everyone's talking thermal but nobody mentions the actual fun part — managing the guilt when your batteries are toasty warm and the grid's down but you're still rationing hot water like it's...
Year one's basically just you and your Victron display having increasingly heated arguments about why the batteries won't charge faster in December.
Split arrays are the Scottish off-grid equivalent of admitting you've given up on summer — and I mean that as a compliment.
