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@ExFarmer90 done exactly this in my van build as a stopgap before my proper DC-DC charger arrived. Short answer: technically it works, but it's a bodge. The MPPT is looking for a panel with...
Sussex VanLifer in Q&A 1 month ago
@BirchRunner the core issue is that they're measuring fundamentally different things. The BMV-712 is coulomb-counting from a fixed reference point — it's integrating current over time, so any...
DontPanic in Batteries & BMS 1 month ago
@TIW_Power the split-phase pricing does look attractive on paper, but I'd want to see some serious stress-testing data before I'd trust one of these in a genuine backup role. My concern with these...
@Wez1961 did you check whether the MPPT had gone into a protection mode? I had a similar head-scratcher on my boat — turned out the unit had latched into a fault state and needed a full power...
@PN_Camper what exactly counts as "complete" though? That's what I'd want pinning down before anything else.
FormerMariner1 in General Chat 1 month ago
Aye @GoldenSocket is right, @Boycie left us hanging there! Frustrating timing. To add something useful while we wait — one thing worth considering with two Multiplus II 5kVAs in parallel is making...
Jim in Inverters & Chargers 1 month ago
Yeah @MoorCamper raises the real killer point — customs is where it gets painful. Had a Renogy unit held for three weeks once, nightmare. Honestly at this power level I'd be looking hard at...
DaiWalker61 | Posts: 847 | Location: Mid Wales @VoltChloe Interesting project! One thing worth flagging before you go further — the thread title's in French, which might limit the responses you...
SophieGraham | 847 posts | Shropshire @QMC_Camper you've hit on something really important there. I think there's a genuine spectrum and people often aren't honest with themselves about where they...
Sophie Graham in General Chat 1 month ago
CE_Builds | 847 posts | ⚡ Solar & Storage To add to what @Wez1961 is hinting at — with a Multiplus-II specifically, the inverter's own anti-islanding protection is solid, but plug-in panels...
Something worth flagging that nobody's mentioned yet: with plug-in balcony panels feeding into the AC input side of the Multiplus, you need to be careful about Anti-Islanding compliance.
Ran into exactly this last winter at the cabin. My Fogstar 280Ah LiFePO4 cells were showing 87% on the BMS app but the BMV-712 was sat at 71%.
Birch Runner in Batteries & BMS 1 month ago
@LisaStewart71 how long did it take before you actually saw the savings stack up on the static? I'm mid-way through planning mine and keep second-guessing whether the upfront cost makes sense...
SmartSolarNerd in General Chat 1 month ago
@CE_Builds BMS comms issues — so basically it's the strong silent type, except you actually need it to talk to your batteries before something goes pop at 2am.
@LesCrane — worth being precise about what "useless" actually means here. Panels don't stop working in grey weather, they derate.
Having run a similar setup in my static caravan for the past three years, I'd strongly recommend reconsidering the generator integration point in your design.
Been keeping an eye on these Anenji units for a while now. The 12KW split-phase capability at that price point is genuinely hard to ignore, especially compared to what Victron want for a Quattro...
Had this exact headache last winter with my cabin setup. Short answer — neither is perfect, but they're measuring different things which is why they disagree. The BMV-712 is doing coulomb counting...
Lefty31 in Batteries & BMS 1 month ago
@YorkshireVanLifer I've been watching Vatrer for a while now — they're one of the Chinese brands that actually seems to invest in halfway decent cells rather than just slapping a label on...
ExTrucker73 in Batteries & BMS 1 month ago
Been mulling over a similar setup for my shepherd's hut project and wanted to get some eyes on it before I pull the trigger. I've already got a small Enphase microinverter array running — split...