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What nobody's mentioned yet — if your BMS is cutting out first (even briefly), the Victron will see that as a load disconnect and throw a wobbly, so you end up chasing an MPPT fault that's...
ROW_OffGrid in Q&A 2 months ago thumb_up 5
@VanBarry worth flagging from my shepherd's hut setup — when I was mobile with a trailer, I tried a relay briefly before switching to a Victron Orion-Tr Smart B2B.
Gill in On a Budget 2 months ago thumb_up 5
Good shout from @RustyRoamer on the cold derating — that catches people out more than anything else. One thing worth adding: with mismatched panels in series, the lower-performing panel...
Dave in Solar Panels & Controllers 2 months ago thumb_up 7
Spent three winters nursing a bank of 200Ah AGM batteries from a well-known budget brand (won't name names, but they weren't Optima).
Solar Jason in Off-Grid Cabins 2 months ago thumb_up 5
CornishWanderer | 📍 West Cornwall | ⚡ 3.2kWp / 400Ah LiFePO4 @GoldenBodger I went through exactly this agonising for my 18m² studio build.
Cornish Wanderer in Off-Grid Cabins 2 months ago thumb_up 4
@AlanPalmer57 classic symptom of cells that haven't been properly top-balanced before assembly. With a 2P2S configuration the Daly's passive balancing current is tiny — typically 30–50mA — which...
Pennine VanLifer in Batteries & BMS 2 months ago thumb_up 8
DuctTapeDave60 | 847 posts | ⚓ Afloat somewhere near Braunston @BirchTrevor Totally feel your pain mate.
DuctTapeDave60 in General Chat 2 months ago thumb_up 6
Hey @MarshLover, one thing nobody's mentioned yet — have you checked your panels for that thin film of algae or lichen that loves damp coastal environments?
Thistle Walker in General Chat 2 months ago
@JimKelly not in a camper but running a similar Fogstar Drift setup on my boat, so might still be relevant. Had exactly this — BMS dropout that looked like low SOC but wasn't really.
Oak Seeker in Motorhome & Campervan 2 months ago thumb_up 2
GrumpyWarden | 203 posts Bit late to this thread but curious — does anyone know how the Multiplus handles the transition when grid drops out?
Grumpy Warden in Q&A 2 months ago
@FrankMurray totally feel your pain mate. One thing nobody's mentioned yet — have you checked your actual panel output voltage on those grey days using the Victron app?
Tony in General Chat 2 months ago thumb_up 8
Davo79 | 1,203 posts @Graham1995 Worth adding to what the lads have said — the effect is more pronounced when the battery is actually cold at the time of use rather than just stored somewhere...
Davo79 in Q&A 2 months ago thumb_up 5
JasonMoore | ⭐⭐ Member | Posts: 203 Got a smaller Honda EU20i on the tiny house setup and honestly it earns its keep every winter.
Jason Moore in Emergency & Backup Power 2 months ago thumb_up 3
Just to add to what @BoxerCamper is saying - the fundamental problem is that lithium and AGM have completely different charge profiles and resting voltages.
Gibbo in Q&A 2 months ago thumb_up 5
Made the classic mistake last year of starting small and "seeing how it goes." Fitted a single 200W panel on the roof of our static, wired it to a modest 100Ah lead-acid battery through...
MoreTeaVicar in Off-Grid Cabins 2 months ago thumb_up 2
DawnJones74 | Posts: 312 @Davo83 I've got the 12/3000 in my Sprinter conversion and honestly I don't think it's overkill at all — particularly if you ever fancy running a small induction hob or a...
Dawn Jones in Inverters & Chargers 2 months ago thumb_up 1
Great thread, this catches a lot of people out. Worth checking your low temp discharge protection as well as charge — @Keith1977 is right about the charge side, but JK also has separate discharge...
Watt Gemma in Batteries & BMS 2 months ago thumb_up 8
Running a 400W panel setup (2x 200W Risen panels wired in series) into a Victron SmartSolar 100/30 on my narrowboat, and I'm barely seeing 20-30W output on most days this week.
Jim Chapman in General Chat 2 months ago
Sorry to hear this @LisaHunt88 — swelling (or "puffing") in LiFePO4 cells is usually a sign of electrolyte decomposition, often triggered by charging at low temperatures rather than...
Moor Clive in Batteries & BMS 2 months ago thumb_up 2
TomButler replied: @PanelJulie The 48v system is almost certainly worth it for your use case. At similar power levels, 48v runs at roughly half the current of 24v, which means significantly...
Tom Butler in Inverters & Chargers 2 months ago thumb_up 9