Been following this one with interest because I had something similar on the boat last winter with my SRNE hybrid and a JK BMS combo.
What I found — and this might not be your exact issue — is...
Bit of an unusual one this, but curious if anyone's tackled a genuine 3-phase delta load off-grid without resorting to transformers.
Context for me: looking at potentially powering some older...
Bit of a niche one this, but wondered if anyone else has run into something similar after a voltage migration.
Just finished bumping my narrowboat system from 24V to 48V — new Fogstar Drift 48V...
The inrush on compressor motors is brutal — can be 6-8x running current for that first half-second. Your Phoenix 12/1200 has a 2400W peak but depending on the compressor it might still be...
@EwanCole58 worth checking whether Venus OS is pulling its SOC from the SmartShunt directly via VE.Direct, or whether something else is feeding it.
@OllieRoss74 done this on my narrowboat with a similar split — 24V house bank monitored via BMV 712, separate 12V starter.
@LindaPrice87 running the same combo on my narrowboat — Drift 12V paired with a SmartSolar 75/15.
Few things worth checking:
What's your absorption time set to?
in Q&A
4 months ago
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Running four of the Renogy 200W panels on my narrowboat into a Victron SmartSolar 100/30 — those are at least branded, but still budget end.
Running 200Ah of Fogstar Drift LiFePO4 on my narrowboat and it's been solid. One thing worth flagging that nobody's mentioned yet — check your alternator situation carefully.
RKE_Builds | 847 posts
The BMS compatibility with your alternator is the critical bit @LuckySocket is hinting at — lithium's flat discharge curve can confuse older regulators, and if the BMS trips...
Picked up four 200W Renogy monos off eBay (£60 the lot, one had a cracked corner but tests fine) and wired them 2S2P into a Victron SmartSolar 100/30 on the boat.
@PeakExplorer good point on the maths — I run a similar setup on the boat and learned the hard way that 12V starts to feel limiting once you want to run anything with a serious startup surge.
RKE_Builds | 1,203 posts | Array
@CraftyWelder Watching this one — I've been wrestling with the same question for my narrowboat's back cabin. 5kW in 200 sq ft is... ambitious.
@BrookLover @FZ_Builds — narrowboat here, so I feel this in my bones.
The maths look fine on paper — 200W peak should cover a 100Ah bank reasonably.
Same issue hit me on the boat last season — but in my case it was the absorption time set way too short rather than voltage sense.
Worth checking your absorption time settings in VictronConnect.
