Had this exact problem on the boat last winter. Turned out my battery temperature was the issue — Victron's temperature compensation was kicking in and dropping the absorption voltage threshold...
@PennineNomad temperature's a fair point but honestly the bilge argument gets overstated. Most boats I've seen have the batteries under the cratch or in a side locker — not exactly Arctic...
@DerekMoore89 been watching this thread with interest. Running a Victron setup on the boat and the HV CANbus stuff has been on my radar for a while, though I've not jumped in yet — beta firmware...
Been meaning to post about this for a while.
Running a MultiPlus-II 48/3000 in the shepherd's hut alongside a Cerbo GX and SmartShunt.
Worth noting that golf cart form factor is a bit of a lottery for actual cycle life claims. Seen plenty of 48V packs marketed at 2000+ cycles that are clearly using B-grade cells.
If you're...
Been on boats long enough to know that confusing labelling causes real mistakes. Had a near-miss on my narrowboat last winter because I couldn't immediately tell which sensor was which during a...
A DC-DC charger sorted this for me — Victron Orion 30A. Even on a 20-minute run it's actually pushing meaningful current into the leisure bank rather than whatever dribble the old split-charge...
Worth noting that PWM vs MPPT is almost a separate debate from cheap vs quality. Had a perfectly decent PWM unit on the boat for years — brand long forgotten, bought from some chandlery — did...
BodgeItAndScarper | 2,156 posts | 🔧 Bodging Since Forever
Done something similar on my motorhome setup — trickle charging an EV from solar is possible but you'll be at the mercy of British...
@T6Life had almost the same on my boat last summer — turned out to be partial shading I'd completely overlooked.
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2 months ago
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@SmartSolar_Geek Running almost identical setup on the boat — two SmartSolars into a Cerbo. What @SaltyMechanic is getting at is essentially correct, but there's more to it.
The bit that actually...
@OldSailor is right that it's correct behaviour, but that doesn't make it less annoying at 3am when your heating's gone off.
On my boat I ended up wrapping the battery box with 25mm armaflex and...
@FET_Fan had almost identical issue on my motorhome last year. What sorted it was bumping the tail current setting right down — Victron's default is too aggressive for lithium on a weak alternator...
BodgeItAndScarper | 1,247 posts
@LindaPrice87 @BurnWalker is right — loads are everything here. But I'll add: UK winters will absolutely hammer that system.
@JakeLee "Overkill" is doing a lot of work there. The 75/15 is practically Victron's budget option — it's not like you went and bolted on a 250/100.
I run one on my narrowboat for a...
