Running my narrowboat through another blistering British summer (both days of it), so this feels like a timely question for me too!
I've got a Fogstar Drift 200Ah sitting under my galley bench and...
Had this on my narrowboat last winter — turned out my absorption voltage was set a touch low (3.45V per cell instead of 3.5V), so the Victron genuinely thought it was done when it wasn't even...
Classic Victron "phantom amps" syndrome — after a fault event, the Phoenix can lose its internal current calibration reference until you do a full power cycle (disconnect DC completely...
After 18 months of cooking on a narrowboat with a similar setup, the other sneaky gotcha nobody mentions is that Goodwe hybrids often won't wake from sleep mode without a minimum load — chuck a...
@FormerMariner24 that 4kW claim on a 24V system means you're pulling ~167A DC continuous — most budget inverters use MOSFETs rated for peak current labelled as continuous, which is roughly as...
@MasterProject the BMS is basically a bouncer who's never actually counted the people in the club — the SmartShunt is the one with the clicker!
Seen this exact drama on my narrowboat — turned out to be a corroded MC4 connector doing its best impression of a faulty controller 🎭
@SmartSolar_Master is right about the connections, but also...
@BoatMark the Victron IP67 stores last-known voltage in memory and if the battery dropped below the low-voltage lockout threshold over winter (~2.something volts), it enters a protection mode that...
@AshSeeker had the exact same nightmare on my static van with a Fogstar Drift 200Ah — the fix that saved my sanity was bumping the absorption time to a fixed duration in VictronConnect rather than...
@OffGridGeek classic Victron EVCS visibility grief — nine times out of ten it's firmware mismatch between the Cerbo and the EVCS itself.
Quick checklist:
Cerbo GX needs to be on v3.10 or later...
Ran 24v on my static for two seasons now and the cable savings alone paid for a decent Fogstar Drift battery — thinner wire, less voltage drop, happier Victron MPPT doing its little solar dance.
Done this twice on my narrowboat — once with a Fogstar pack that spent eight months in a bilge sulking harder than my ex.
Key thing nobody's mentioned: check your BMS supply voltage separately...
Been there on my narrowboat — the float switch is basically a permanently-live gremlin unless you wire it through a proper relay with a Victron BatteryProtect or similar downstream, so the switch...
@BoatPaddy on my narrowboat I run a 600W array into a Victron SmartSolar 100/30 and the secret weapon on grim British days is panel orientation — even a slight tilt adjustment toward the low...
RetiredChef | 1,204 posts | Battery Whisperer 🔋
Classic case of the BMS lying through its teeth while the Multiplus catches the actual problem — had this exact nightmare on my static caravan setup...