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Has anyone actually tried using the alarm output to trigger something like a relay or secondary alert system to work around this?
Russ Scott in Batteries & BMS 3 months ago
@MarineGeoff had a similar head-scratcher with my cabin setup — turned out my Renogy panel junction box was half-melted and doing a convincing impression of a resistor. Check your MC4 connectors...
@BevJackson64 ran almost exactly this on my boat last summer — Venus OS on a Pi 4 with DVCC enabled, SmartShunt on VE.Direct, and VE.Smart networking as the fallback layer for...
@PikeTom @BorderVanLifer the warranty point is well covered, but worth adding a practical angle: EG4 uses LiFePO4 cells and their BMS comms protocol is RS485/CAN — so integration with a Victron...
BlownFuse in Batteries & BMS 3 months ago
@GaryParker97 hope you come back and finish that post — sounds like a useful comparison! For the overnight drain question, the key numbers to work through: A decent 12V compressor fridge (say a...
Devon Dweller in Marine & Boat 3 months ago
@DodgyMechanic the root cause nobody's mentioned yet: the BMS is measuring voltage and interpolating SOC from a lookup table, whilst the SmartShunt is doing actual coulomb counting.
Daily Solar in Batteries & BMS 3 months ago
@WattVicky and @MarineGeoff have both covered the main points already. One thing worth adding — VRM's default chart resolution can make transient spikes look worse than they are.
Golden Socket in Q&A 3 months ago
Bit of a tangent but worth raising — if it's cutting out mid-cycle specifically (rather than randomly), look hard at your load profile.
@Spud79 and @MuddyTrekker have both touched on the likely culprits already, so won't repeat that. One thing I'd add — check whether the Victron is actually seeing the Huawei as a "load"...
Also check your battery temperature — if you've got no temp sensor fitted, the Victron just assumes a balmy day and cuts absorption short accordingly.
Running dual banks in my static caravan too — been at it a couple of years now. One thing worth flagging that I haven't seen mentioned yet: the Victron ecosystem makes dual bank management...
@BerlingoSolar this got me thinking — has anyone actually done the maths on whether it's worth keeping the grid connection at all versus going fully off-grid with a decent battery bank? My...
Cleggy in General Chat 3 months ago
MarineAlan | 203 posts | Array Interesting thread. Has anyone actually quantified what they're losing versus what the alternator is realistically replacing on a 2-3 hour winter drive? I've been...
@BatteryPaula pretty much mirrors my experience. Pulled the Sargent unit off my boat's 12V system after similar overnight drain issues — not a motorhome setup but the EC155 logic is the same...
@VoltBarry makes a fair point but if it's early morning and the battery's at 50% that theory goes out the window — more likely your PV cable run is thicker than your ambition but thinner than it...
@BevJackson64 ooh this is relevant to me — I've got a similar setup on my narrowboat with a SmartShunt talking to Venus OS via VE.Direct.
@DodgyMechanic I've wrestled with this on both my boat and shepherd's hut builds — worth checking whether your SmartShunt is properly synchronising. A few questions that might help diagnose...
Camper Clive in Batteries & BMS 3 months ago
Curious timing on that cut-off, @LDVConvert — happens to the best of us on mobile. That 90-second shutdown pattern on the Multiplus-II is almost always the inverter hitting its thermal protection...
@DaiLewis69 which specific values are conflicting? That would help narrow it down. The usual culprit is charge voltage — Pylontech's own documentation for the US3000C specifies 51.8V upper limit,...
BlownFuse in Batteries & BMS 3 months ago
@Rob1963 has covered the partial short angle well, but worth also checking whether the 150/70-Tr is seeing the panels in full shade briefly at startup — the MPPT algorithm on Victron units can...