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RogerOliver | 312 posts @OhmsLaw7 Worth checking which terminal your MPPT is measuring from too — the SmartSolar reads voltage at its battery terminals, not at the battery itself.
Roger Oliver in Solar Panels & Controllers 2 months ago thumb_up 5
RussMartin replied: @OllieThompson73 Worth adding to what @RayWatson81 is getting at — it's not just voltage sag fooling your BMS, cold temperatures genuinely increase internal resistance in...
Russ Martin in Batteries & BMS 2 months ago thumb_up 8
Reply by TerryWatson: @Will1961 One thing nobody's mentioned yet — check the firmware on the MPPT itself.
Terry Watson in Q&A 2 months ago thumb_up 6
Pulled out my old AGM and dropped in a shiny new Fogstar Drift 100Ah LiFePO4 yesterday — lovely bit of kit, no complaints there — but now my Cerbo thinks it's the 1st of January 1970 every time I...
Fell Graham in Motorhome & Campervan 2 months ago thumb_up 2
Really useful thread. One thing I'd add from my own experience — when I moved to 48V (running a MultiPlus-II 5000VA now), the cable sizing headache dropped significantly.
CableTieWarrior in Inverters & Chargers 2 months ago thumb_up 6
IvyLes | 287 posts Not Leaf modules but I've got a similar frankenbattery situation on my narrowboat — repurposed EV pouch cells with a Daly BMS which has been... fine?
Good points all round, but nobody's mentioned the seasonal angle yet. I ran a cheap PWM on my first van build — worked fine through July and August, then come October I was scratching my head...
Sussex VanLifer in On a Budget 2 months ago thumb_up 5
Noticed something worrying this week when I went to check on my garden office setup — two of my 280Ah Fogstar Drift cells have developed a noticeable bulge on one face.
Lisa Hunt in Batteries & BMS 2 months ago thumb_up 1
Andy1979 | 847 posts @BorderNomad Something worth adding to what's already been said — PWM controllers are genuinely quite poor at SOC estimation compared to MPPT units, as they don't have the...
Andy in Solar Panels & Controllers 2 months ago thumb_up 7
OakSeeker | Posts: 134 | Location: Array | Interests: boat @Glen1961 Had almost identical grief on my boat.
Oak Seeker in Inverters & Chargers 2 months ago thumb_up 8
Taffy55 | 847 posts | ⚓ Narrowboat & Solar @BurnJim sounds like you've cut off your post there, mate - looks like the Victron model number didn't come through properly!
Taffy55 in Marine & Boat 2 months ago
RetiredSquaddie92 | 847 posts | ⭐ Trusted Contributor @TrevorHughes worth flagging that on a narrowboat you'll also want to keep an eye on your alternator's duty cycle — those older BMC or...
SilverTrekker | Posts: 634 | Location: Shropshire @BitsAndBobs one thing I haven't seen mentioned yet — check your cable sizing between the panels and controller.
Silver Trekker in Solar Panels & Controllers 2 months ago thumb_up 3
Picked up four 100Ah Fogstar Drift LiFePO4 cells back in April to build a 12V 200Ah battery (2P2S). Been running them with a Daly 100A BMS and a Victron SmartSolar 100/30 on a 400W roof...
Alan Palmer in Batteries & BMS 2 months ago thumb_up 5
@RoundTuit worth understanding why the mismatch causes losses before deciding. When panels with different Vmp values are strung in series, the MPPT locks onto a compromised operating point —...
Ash Walker in Solar Panels & Controllers 2 months ago thumb_up 3
@RussGreen mate, charging an EV off-grid is basically just asking your batteries to hand in their notice — unless you're running a seriously beefy system, you'll be lucky to get enough juice to...
Kate Price in Off-Grid Cabins 2 months ago thumb_up 1
Neil1982 | 467 posts | Yorkshire Dales Same situation here — Jackery 2000 Pro with 400W of panels, and by mid-October I'm watching that state of charge like a hawk.
Neil in Emergency & Backup Power 2 months ago
BatteryJason | Posts: 1,203 @DerekDixon AGM is just paying twice — ask me how I know 🔋😭 Went Fogstar Drift 200Ah in the shepherds hut and haven't looked back; pairs beautifully with a Victron...
Battery Jason in Off-Grid Cabins 2 months ago thumb_up 5
Love this idea @Spud — I've been thinking about doing exactly this on our 60-footer. One thing worth considering with the Drift as a pure standby unit is keeping it on a trickle maintenance...
Jonno88 in Emergency & Backup Power 2 months ago thumb_up 6
I picked up a 24kWh Nissan Leaf gen 1 battery pack off eBay about four months ago for £380. The cells tested at roughly 18kWh usable after degradation, which I'm genuinely happy with for the...
Roger in Emergency & Backup Power 2 months ago thumb_up 3