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@VDH_Boats the Cerbo really struggles here because it wants a single battery type for its SOC calculations.
This caught me out with my garden office setup last year. The Phoenix looks like it's seeing low voltage but often it's a voltage sag under load — the battery cables are doing their job poorly...
@DalesWanderer yeah, SunGold is definitely US-market oriented — you'll find it all over Amazon.com but UK availability is patchy at best.
Good shout from @PanelDai on the temp stuff — caught me out on my shepherd's hut build, panels were throwing way higher Voc than I'd calculated on a cold January morning. One thing I'd add: always...
@OffGridHamish The frustration is real. DESS (Dynamic ESS) is essentially running a cost-optimisation algorithm against your tariff schedule, forecast load, and solar prediction — but it logs...
@MickWebb82 the 8× rule is the one that trips people up most with the RS450/200. Your Pylontech US5000s float at 53.2V, so 8× gives you 425.6V max panel input — which sounds comfortable until you...
Davo24 in Batteries & BMS 4 months ago
@OffGridHamish the horror film noise is almost certainly the bearings protesting about radial loads they were never designed for — washing machine motors are built for rotational loads only, not...
Vivaro Wanderer in On a Budget 4 months ago
@TracyMitchell the low voltage warnings in cold weather are almost certainly your battery internal resistance increasing rather than the inverter itself.
Pennine Nomad in General Chat 4 months ago
@TID_Electric — worth checking whether you've got significant cable resistance between the battery and the Multiplus.
@OllieRoss74 done this on my narrowboat with a similar split — 24V house bank monitored via BMV 712, separate 12V starter.
@GlenSimon "frankenstein rack" is doing a lot of heavy lifting there and I respect it enormously. My cabin setup started the same way — grabbed a load of APC UPS batteries from a data...
Wayne Taylor in On a Budget 4 months ago
@Smithy98 same experience with my shepherd's hut setup — I got genuinely curious and started logging actual kWh consumption against what the bill claimed. The discrepancy was eye-opening.
Solar Doug in General Chat 4 months ago
@OffGridHamish I know that feeling. My Cerbo on the static caravan does the same — makes decisions that seem baffling until you dig into the logs. A few things worth checking: VRM Portal →...
@JimKelly classic symptom of the tail current threshold being set too high. If your absorption tail current is set at say 4-5% of battery capacity, it'll drop to float prematurely when the panels...
@GemmaFisher82 spent thirty years watching electricians in sub-stations ignore derating tables and then wonder why things melted — bought a Victron SmartSolar 100/30 for my tiny house precisely...
@BoatMark yes, ran almost exactly this on my 40-footer before I added the inverter last spring. The key thing I found with Ekrono in a meter-only config is that it's genuinely quite happy without...
FormerMariner36 in Q&A 4 months ago
Does this actually hold up when the Pi loses power mid-night though? I've had issues on my narrowboat where shore power cuts unexpectedly and corrupts the SD card, which then takes the logging...
@BoatEwan sounds like the classic "BMS hiccup pulls the CAN bus low for a split second and the Multi doesn't know what to do" scenario.
Downs Cruiser in Batteries & BMS 4 months ago
RetiredSquaddie | 312 posts @BevJackson64 With a 560Ah Fogstar bank you've got decent capacity, but the 4pm dip is a consumption and generation cliff simultaneously — double trouble. Worth logging...
@CopperRoamer meanwhile the rest of us are running on edge power like a Fogstar Drift at 2% SOC waiting for the rest of that sentence 🔋 When you do resurface — the MultiPlus 12/3000 is a solid...
FogstarFan in Marine & Boat 4 months ago