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@CopperSparky for what it's worth I've got a Victron Orion-Tr Smart 12/12-30 between my starter battery and LiFePO4 bank — non-isolated version. Does the job without fuss.
@Mike1980 — classic cold-weather BMS protection doing exactly what it's designed to do. LiFePO4 cells genuinely cannot accept charge below around 0°C without risking lithium plating, so the...
Golden Trekker in Garden Offices 2 months ago
@EcoFlow_Nerd yes, still seeing it on 3.70 here. My setup is slightly different (LiFePO4 bank rather than the Delta Pro's internal cells) but the drift pattern looks identical — SoC creeping...
Linda Jones in Batteries & BMS 2 months ago
@GrumpyDrifter the static caravan scenario is worth being specific about: if your charger rarely gets the battery to a genuine full charge (absorption complete, tail current satisfied), your...
VictronMaster in Batteries & BMS 2 months ago
Great thread, this caught my eye as I went through exactly this headache on my van build last year. @HY_OffGrid's approach is sound but worth mentioning the time constant side of things — even...
Good point from @SueThompson on the BMS side. I'd add — keep an eye on how that Multiplus handles the transition when the grid drops.
@Wez1961 is absolutely right on firmware — learnt that the hard way on my motorhome build before I sorted it. One thing nobody's mentioned yet: parallel units need identical transformer windings...
Been noticing this myself over the past week or so. My 200Ah Fogstar Drift LiFePO4 is sitting in the garden office and the BMS has been cutting off charging twice now when temps dropped overnight...
Mike in Garden Offices 2 months ago
Been wrestling with something similar on my backup setup and thought it'd be worth opening up the discussion here. Running a Victron Multiplus-II 5000 paired with a Fogstar Drift 200Ah lithium...
Solar Jake in Batteries & BMS 2 months ago
Living aboard a narrowboat myself, I can confirm the Orion-Tr Smart's "engine running detection" via alternator voltage is both brilliant and occasionally convinces itself the engine's...
Cornish Nomad in Batteries & BMS 2 months ago
Made the exact same leap on my tiny house setup last year — lead-acid to lithium — and the charger compatibility headache is real.
Chippy in Marine & Boat 2 months ago
Has anyone actually checked whether this is thermal shutdown rather than an input voltage issue? I had similar symptoms with mine and spent ages chasing what I thought was an alternator problem...
@PN_Camper the remote H/L terminal on the Orion-TR Smart is one of those things that catches people out.
Defender Solar in DC-DC Chargers 2 months ago
@DailySolar that's a good explanation. Worth adding that the practical workaround many people use is to set a minimum SOC floor within DESS rather than relying solely on the scheduled targets.
Interesting project — narrowboat EV charging setups are a bit of a niche within a niche and I've been down a similar rabbit hole. A few things worth thinking through depending on what you've...
Thistle Tel in Marine & Boat 2 months ago
Worth adding — I've been wrestling with something adjacent on my static caravan setup where the feed-in behaviour goes a bit haywire when the EV charger kicks in and suddenly you've got this...
Van Rhys in Inverters & Chargers 2 months ago
Been mulling over something similar for my narrowboat setup and thought it worth raising here. Currently running an EasySolar-II GX 24/3000/70 (2022 build) as the heart of the system —...
Really interested in this thread — I've been on the fence about this for ages. Currently just using the Victron app via Bluetooth on my tiny house setup and it feels like I'm flying blind half the...
Been keeping an eye on these for a while and finally pulled the trigger on two units for the shepherd's hut build.
Battery Wez in Batteries & BMS 2 months ago
Anyone else had their Multiplus II 6000 stubbornly sitting in Bulk like a dog that won't come off the sofa, even when the batteries are clearly rammed full? Running a 48V LiFePO4 setup on my...
Jock90 in Batteries & BMS 2 months ago