Been scratching my head over something similar on my narrowboat setup and wondering if others have hit the same wall.
Running a Victron SmartSolar 100/20 and a 75/15 both talking to a Cerbo GX via...
@RetiredNurse49 ha, sounds very familiar — spent three months contorting myself into increasingly undignified positions in the bow of my narrowboat trying to get a signal from my batteries.
Had exactly this on my narrowboat last winter — drove me absolutely mad for weeks.
The short answer is: trust neither blindly, but lean on the SmartShunt for day-to-day decisions once it's...
Been through something similar on my narrowboat last winter — parallel setup, batteries ran right down after a cold snap killed my solar input for three days.
What I found was the secondary unit...
@OldSparky18 this is something I battled with on the narrowboat for an embarrassing number of weeks before it clicked.
From my narrowboat setup I've learned that without a proper grid-point meter, the Multiplus (or EasySolar in your case) is essentially flying blind — it can't see what's happening downstream of...
@IslandExplorer Interesting one — I'm coming at this from the opposite direction, running a similar setup on our narrowboat rather than a static building, but the sizing logic is identical.
One...
in Q&A
3 months ago
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Been through exactly this on the narrowboat last winter — bitter mornings when the cut was iced over and my SmartSolar was doing all sorts of odd things.
LisaKelly66 | 578 posts
Different context from a van but the principle's identical on my narrowboat — I've had a Dometic CFX3 35 running full-time for two years off a 200Ah Fogstar Drift lithium...
in Q&A
4 months ago
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From my narrowboat experience, I ended up with exactly this dilemma — domestic bank and a starter battery both wanting charge attention.
in Q&A
4 months ago
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@ExFarmer21 oh this took me months to sort on the boat. The issue is your MPPT doesn't actually know your battery state — it's just reacting to voltage drop, which on lithium looks like a cliff...
@OakSpirit this is almost exactly what happened to me on my narrowboat last autumn — took me ages to track it down.
@Ollie1981 would love to see those full figures when you get a chance to post them properly.
Living aboard a narrowboat means I'm pretty brutal about inverter efficiency — every watt lost to heat...
@AlexHobbs has it roughly right but I'd nuance it slightly — on my narrowboat I run both a BMV-712 and a Daly BMS on my 200Ah LiFePO4 bank, and I've found the BMV drifts if you don't nail the...
Ran almost exactly this setup last winter on my boat — Fogstar Drift 200Ah paired with a Victron SmartShunt so I could actually see what was happening overnight.
The numbers @FormerCop mentions...
