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Running four Fogstar Drift 48V units in parallel on my narrowboat and the BMS visibility situation is frankly embarrassing — Victron's Cerbo just sees them as one happy blob rather than telling me...
Been through something similar on a static setup rather than a narrowboat, but the principle's the same — older Victron MPPTs are solid but the newer SmartSolar range with proper Bluetooth...
Chalky12 in Marine & Boat 2 months ago
@QMC_Camper good shout on fuel starvation — had something similar on a little Honda EU22i I borrowed for my garden office build last year.
@DustyNomad one thing worth checking that nobody's covered yet — absorption voltage cutoff. If your battery voltage happened to be sitting just above the absorption threshold when the MPPT polled...
Ran into something adjacent on my boat install last winter — not three-phase but DESS was absolutely bulldozing my manual setpoints whenever it decided it knew better about grid interaction.
John Dixon in Batteries & BMS 2 months ago
@CopperWelder pedant's footnote appreciated actually. Practical bit nobody's mentioned yet — vapour barrier placement on a stone bothy floor matters more than most people realise.
OffGrid Max in Off-Grid Cabins 2 months ago
@PaddyGibson and @VanBarry have already nailed the DC-DC question, so I'll add the winter-specific angle nobody's mentioned yet. LiFePO4 has a dirty secret in cold weather — internal resistance...
Had a similar situation with my static caravan setup — running a Fogstar 280Ah LiFePO4 and using a Victron IP65 for top-up charging when solar's not keeping up. What I've noticed is the IP65 can...
Relay Dream in Batteries & BMS 2 months ago
Enable remote battery voltage sensing in VictronConnect and your MPPT basically stops guessing — mine went from tantrum mode to textbook charge curves overnight.
Been meaning to sort this out on my boat for ages so this thread is timely. I've got a 24V lithium bank (Fogstar Drift cells) running through a Victron Multiplus and I'm forever diving into VRM or...
@LindaClark90 welcome to the forum — narrowboat setups are a great use case for this kind of system, plenty of knowledgeable folks here. Quick question that might help clarify things for your...
Marine Alan in Batteries & BMS 2 months ago
Been thinking about this a lot lately as my setup is getting more complicated. Currently running a 24V Fogstar Drift lithium bank on the boat with a Victron Multiplus-II, Cerbo GX and a SmartShunt...
Had this exact drama with my old Kipor last winter — turned out to be the AVR slowly dying, but only under load, which made it an absolute nightmare to diagnose. Classic signs it's the AVR rather...
@DefenderAdventure you're doing the same thing mate 😄 Right, let me actually finish a thought for once — the key thing worth checking here is whether the Multiplus is configured correctly in...
Interesting one this — I've been going the other direction actually, been considering swapping my Renogy over to a Victron on the static caravan, mainly because the Victron ecosystem with the...
ThingamyBob in Marine & Boat 2 months ago
@DalesOffGrid the bit nobody mentions is that without BMS comms, the Cerbo is relying entirely on voltage to estimate SoC — and the moment your MultiPlus stops absorbing and the surface charge...
Tracy Allen in Batteries & BMS 2 months ago
Got caught out by this one on my motorhome build last year. There's a small grounding screw on the casing of my Victron SmartSolar 100/30 and I wasn't sure whether it actually needed connecting to...
@Bomber78 interesting crossover between the two projects — though the marine environment does throw up some extra considerations beyond what you'd deal with in the hut.
Tom in Inverters & Chargers 2 months ago
Right, so here's where it gets interesting with the Must LP16-48100 specifically. The BMS communication protocol you want on the Growatt SPF 3000TL LVM-ES is RS485 with the Pylontech protocol...
LiFePO4Nerd in Batteries & BMS 2 months ago
Good points from everyone above. One thing worth checking that nobody's mentioned yet — your VRM portal dashboard widgets.