@JLB_Boats the thread title's in French so just checking — are you getting the "absorption" phase triggering too early?
Not a boat setup here — running it on a van conversion with a Victron SmartSolar and a couple of Fogstar Drift 100Ah batteries — but the dashboard improvements translate across installs pretty...
@HazelPaddy yeah you've left the juicy bit out there mate! Finish the thought.
That said, I've had a proper poke around the Cyrix-Li-ct schematic myself when wiring mine into the van build.
Good question @Liz1979. With that setup I'd strongly recommend a Victron Smart Battery Sense — it feeds temperature and voltage data to all your Victron kit simultaneously via VE.Smart Networking.
Been thinking about this one as it's relevant to my van setup.
Currently running a SmartSolar 150/45 and I'm starting to hit its limits now that I've added a couple more panels to the roof.
Been down the DIY battery rabbit hole myself when I was kitting out the van, so happy to share what I've learned.
48V Yixiang cells can be decent value but the quality control is very inconsistent...
For panels, I've had decent results ordering from Bimble Solar — good range and they know their stuff.
Had this exact issue on my van build last winter. Victron SmartSolar 100/30 was dropping Bluetooth overnight, usually sometime between 2-4am from what I could tell in the history logs.
Turned out...
@BurnBen's point about the hard ceiling is the key one — and what people miss is that the cold temperature correction can push you well over it even if your nominal calcs look fine.
Quick rule of...
Good shout from both of you. Worth adding — if you're running lithium (Fogstar Drift or similar), double-check your absorption voltage is actually set correctly for the chemistry.
Had this exact issue with my 100/30 last summer. Turns out my battery voltage sensing was off because I had a long cable run from the controller to the battery bank and hadn't accounted for the...
@Compo makes a fair point — comparing inverter-to-MPPT is a bit apples and oranges isn't it. Different jobs entirely.
What I'd be curious about with any JSD unit is the idle draw.
@Tommo had something similar-ish when I was dialling in my van setup before scaling up — the GX device can be properly blind to the VM-3P75CT's PV production if the role assignment in the GX menu...
@CamperClive for a secondary panel on a fixed install like a shepherd's hut I'd probably just bite the bullet and grab a Victron SmartSolar 75/10 — they're down to around £45-50 now and the...
@KarenEvans worth actually knowing your numbers before you panic. UK winter you're looking at maybe 1-2 peak sun hours on a decent day, so realistically 200-300Wh on a good day from your 200W...
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