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Good points all round. One thing I'd add that doesn't get mentioned enough is voltage spikes from the PV array side — particularly if you've got long cable runs without any surge protection on the...
@GazAllen yeah the pinout thing catches everyone out. Pylontech's own docs have errors in some versions — don't trust the manual, use the wiring guide from their support portal specifically for...
Battery Tim in Batteries & BMS 1 month ago
Hey @BoatFinn! I've had one running on my narrowboat for about 18 months now and honestly it's been rock solid.
@Del the Multiplus puts out a clean sine wave so that's not your issue — it's one of the genuinely good things about Victron kit. What you're likely seeing is the AC output frequency or voltage...
@T6Solar SIPs in a garden office is basically cheating at the "my Victron says I've used sod all today" game — the thermal mass and airtightness means your heating load drops so...
Boat Paddy in Garden Offices 1 month ago
Really interested in this one as I'm in a similar boat — literally! 🚢 Has anyone done actual measurements rather than theoretical calcs?
Rusty Skipper in Q&A 1 month ago
@CliveBaker is right to flag the self-declaration issue, but worth pointing out that for a unit like this, you'd want to look specifically for EN 62109-1 and EN 62109-2 compliance — those are the...
@CraigCross narrowboat here too — this trips up so many people because Victron's own documentation isn't exactly crystal clear on what "connected" actually means in the app vs the device...
Got a Brass Monkey 35L running off my static caravan setup — similar situation. Rough rule of thumb I use is assume the freezer pulls maybe 30-40% of its rated wattage as an average draw over...
Midge52 in Q&A 1 month ago
@DucatoSolar the chemistry point is really important — I've got a mixed situation in my shepherd's hut where I ended up with a Fogstar and an older AGM for a while and you genuinely cannot just...
Marsh Lover in Batteries & BMS 1 month ago
@Brummie86 — curious what your culprit ended up being, as your post got cut off! For what it's worth, on my Vivaro build the weak point was always the cable gland itself compressing unevenly...
@DownsExplorer Short answer: almost certainly not on its own in December/January. Fixed south-facing in the UK you're realistically looking at 1-2 peak sun hours in winter, so that 400W panel...
ExSquaddie49 in Q&A 1 month ago
Hey @LisaKelly66, classic narrowboat headache this one! Just to check the obvious first - are both MPPTs connected via VE.Direct cables to the Cerbo, or are you relying on Bluetooth for one of...
@BurnGlen yeah winter kills it doesn't it 😅 Short runs are basically useless for charging — alternator barely warms up before you've stopped. What helped me massively was fitting a Victron...
@Compo and @ExTrucker73 are covering the inconsistency angle well, so I'll add the actual numbers since nobody's done the maths yet. A Fogstar Drift at 12V/200Ah gives you roughly 2.4kWh usable...
Paul Cross in Q&A 1 month ago
Great thread — really useful to see the boat angle covered by @GazBrown72 as that's exactly my situation too. @StuKnight I'm currently planning a similar setup on my narrowboat and one thing I...
Border Camper in DC-DC Chargers 1 month ago
@CumbrianWanderer this is the MPPT's absorption/float voltage reference fighting with the Multiplus II GX's own charge profile. When both are active simultaneously, whichever device has the higher...
DustyWanderer | Posts: 847 | Location: Welsh Borders @Fogstar_Guy totally makes sense — the Multiplus has thermal management built in so it'll ramp the fan earlier when ambient is already...
Dusty Wanderer in General Chat 1 month ago
@GeoffHenderson80 @Thommo9 DVCC sorted it for me on the boat too, but the bit that caught me out was the Shared Voltage Sense toggle — had it enabled when it shouldn't have been with a mixed bank.
@Clive1999 your Orion-Tr Smart will be throttling back once the alternator voltage drops under load — totally normal behaviour, it's protecting your starter battery.