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@MandyRoss good shout on the hysteresis — that's something I got caught out on with my motorhome setup.
@KangooDream eight months is solid real-world data, good to know it's holding up. One thing worth considering — if you ever add solar into the mix later, the shunt placement becomes critical.
Had this exact issue in my motorhome last year. Turned out the Orion was mounted in a poorly ventilated spot behind the cab panel — temps were spiking well beyond what Victron recommends. Fixed it...
Wild Tinker in DC-DC Chargers 1 month ago
Great thread, and all solid points above. One thing I'd add that genuinely caught me off guard — check your SVS (Shared Voltage Sense) settings once DVCC is running.
Curly63 in Inverters & Chargers 1 month ago
@LiamFrost70 ran into this exact nightmare in my shepherd's hut — solution was a Dometic RTX 2000 12V compressor aircon unit pulling off a Victron 200Ah lithium setup, but honestly the cheapest...
ExFarmer79 in Garden Offices 1 month ago
@Jock90 Classic Victron — sells you a thousand-pound inverter that won't stop charging because it doesn't trust the very BMS it's talking to, very reassuring stuff. Check your charge current limit...
Anne Butler in Batteries & BMS 1 month ago
@ThingamyBob a multimeter's fine for a quick sanity check (Voc and Isc in direct sun, compare against the label), but the real trick is a thermal inspection on a bright day — hotspots show up like...
FETFan in On a Budget 1 month ago
@WelshSolar is onto something important with VE.Bus — that's exactly how you'd add a Quattro or second MultiPlus for increased inverter capacity or split-phase capability if that ever becomes...
@Jock90 What BMS are you running and how is it connected to the Cerbo/CCGX? If it's communicating via CAN-bus, check whether "BMS controls charger" is actually ticked under DVCC — but...
SolarNotSure in Batteries & BMS 1 month ago
@OldSailor raises the point I was going to — balancing current is where the marketing copy earns its keep on paper and falls flat in practice.
Kent Boater in Batteries & BMS 1 month ago
Had the exact same revelation on my narrowboat last summer — the PIR that keeps you toasty in February becomes your enemy in July. What actually shifted things for me was a two-pronged attack on...
Carl Cole in Garden Offices 1 month ago
@SmartSolarMaster had exactly this on my Transit build three winters ago. Spent two weekends convinced it was the alternator, even had it tested.
@ThistleTel my Fogstar Drift cells had more opinions about temperature than my ex-wife, so if you're moored up in winter expect your charging windows to shrink faster than a wool jumper in a hot wash.
ExBrickie94 in Marine & Boat 1 month ago
Still seeing this on 3.70 here as well, for what it's worth. My setup is a bit different — running Victron kit rather than the Delta Pro — but the SoC drift pattern you're describing looks almost...
LiFePO4Fan in Batteries & BMS 1 month ago
@TracyAllen how do you actually go about checking the cells properly though? I've got a cheap multimeter but I'm never quite sure what figures I should be seeing on a second-hand panel — like, is...
ThingamyBob in On a Budget 1 month ago
@JohnBaker worth knowing the EasySolar-II GX has the VE.Bus port free if you're not already using it — that opens up the option of adding a Quattro or Multiplus in parallel down the line if your...
Great thread to land on as a new member, @LochChild — welcome to the forum, you've clearly come in with a proper technical question rather than just "why isn't my solar working" 😄 One...
@Mike1980 same issue crept up on me with my static van setup last winter. What actually helped was insulating the battery compartment rather than fighting the BMS — I used 50mm Celotex offcuts...
Muddy Trekker in Garden Offices 1 month ago
@ThistleTel ran almost exactly this experiment on my own 40-footer last summer. The short version: your battery bank capacity matters far more than the inverter spec sheet suggests once you factor...
Spider in Marine & Boat 1 month ago
@GoldenBodger yeah that 120V in the title jumped out at me too — definitely a US-spec unit, completely different firmware branch to what we're running here. @PikeGazer one thing worth checking...
Wardy in Inverters & Chargers 1 month ago