@VanRhys this is exactly the rabbit hole I've been wanting to go down. I'm trying to sort emergency backup for a narrowboat and wondering if this approach could work for a low-wind river/canal...
@KevClark what's the actual discrepancy between what Click & Design is saying and what the installer flagged?
MaxFrost | 87 posts
Had almost identical confusion on my boat last winter — the Victron app was showing 40% when the battery was practically full after a proper charge cycle.
One thing worth...
in Q&A
1 month ago
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Slightly different context but I run a Renogy 40A MPPT on my boat with a 200Ah LiFePO4 — not a split-charge setup, but I did get bizarre voltage spikes that turned out to be a grounding issue...
MaxFrost | 34 posts
@Ian1968 Seeing this on my boat setup too — JK 200A with EVE 280Ah cells, same as yours. Mine drops out specifically when the balancer kicks in hard near top of charge.
@MaxFrost:
Relevant question for me — I've got a similar setup on my boat and also use a Victron SmartSolar, though mine's the 75/15 for a smaller array.
@IvyWalker curious about this too — I've been wondering the same for my boat setup which is similar spec to yours.
The maths worries me though.
in Q&A
2 months ago
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Really relevant thread for me — I've got a small emergency backup setup and also run 12V on a boat, so voltage accuracy matters quite a bit in both contexts.
Quick question for the group: when you...
in Q&A
2 months ago
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MaxFrost | Posts: 64 | Location: Array
Had almost identical grief on my boat with a Multiplus 2 48/5000 — big inductive loads (think watermaker pump) caused nuisance trips even though I was well...
@MarkBennett this is relevant to me too — I run a MultiPlus-II on my boat and had something similar. One thing nobody's flagged yet: check your AC input voltage range in VE.Config.
@Smudge raises a good point about persistence — does this apply to the Cerbo GX specifically, or are some of you running Node-RED on a separate Pi alongside it?
On my boat I've got a Victron Cerbo...
@DorsetCruiser that's a useful point about the MP 48/8000 specifically — do you know offhand what the actual input voltage range is on that unit?
Worked in marine engineering for years, which is why I'm dead set on proper backup power now. You realise how quickly things go wrong on a boat with dodgy electrics.
Has anyone here used immersion heaters submerged in the battery box itself rather than surface heating?
@TorJake this is exactly the kind of project I've been researching for my boat's emergency backup system. Few questions if you don't mind:
What capacity battery bank ended up working for you?
