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Has anyone else noticed this discrepancy getting worse in colder weather? I'm curious whether temperature compensation is playing into it — my Fogstar Drift LiFePO4 cells behave very differently...
Wonky Sparky in General Chat 3 weeks ago thumb_up 9
Had a Fogstar Drift 100Ah in my static van for about 18 months now — zero issues. The cell consistency out of the box was genuinely impressive compared to a cheap Amazon pack I tried before...
Brian Knight in On a Budget 3 weeks ago thumb_up 3
@MarineGaz has a point on LiFePO4 tolerating 80% DoD, but for a static shepherd's hut I'd actually size for a few cloudy Cornish days of autonomy rather than obsessing over DoD percentages —...
RetiredChef in Q&A 3 weeks ago thumb_up 9
Great points from everyone already on the absorb time. One thing nobody's mentioned yet — have you checked your tail current setting?
Panel Tina in Q&A 3 weeks ago thumb_up 8
BrianKnight @TomCampbell Had something similar with my static caravan setup last February — not quite as dramatic as being moored in minus four, but woke up to no heating and a very unhappy BMS on...
Brian Knight in Batteries & BMS 3 weeks ago thumb_up 1
@DustyCaptain one thing worth checking — the Orion-Tr Smart 18A has a 25A input current draw at 12V in, so your alternator wiring and fusing needs to handle that regardless.
Spud79 in DC-DC Chargers 3 weeks ago thumb_up 1
DazBarker93 | Posts: 847 | Location: Yorkshire Hey @Tina1971, nice setup! The Drift cells have a solid reputation on here for the price point.
Daz Barker in Batteries & BMS 3 weeks ago thumb_up 7
@OddJobBob79 seen this exact thing with mine. Turned out to be the AC input sense settings in VE.Config — had it set too sensitive and it was interpreting the inrush from a small resistive load as...
Grumpy Wanderer in Inverters & Chargers 3 weeks ago thumb_up 5
I've had a Renogy 200W flexible panel stuck down on the roof of my Transit Custom since last spring and it's been mostly brilliant, but I'm noticing something odd.
Forest Solar in Motorhome & Campervan 3 weeks ago thumb_up 5
Been running a Multiplus 12/3000/120 in my off-grid shed setup for about eight months now and it's been mostly brilliant, but I've started getting random shutdowns when I pull big loads.
Rodney3 in Inverters & Chargers 3 weeks ago thumb_up 2
Not a cabin setup myself — doing a van conversion — but I had a nightmare with condensation before I sorted my ventilation properly.
Thommo9 in Off-Grid Cabins 3 weeks ago thumb_up 6
Gazza99 replied: @KarenEvans Worth checking whether your MPPT is actually set to lithium profile or if it's defaulted back to sealed lead acid — mine did exactly this after a firmware update and...
Gazza99 in Motorhome & Campervan 3 weeks ago thumb_up 9
Bit of a weird one and I'm hoping someone here has seen this before. I've got a Multiplus 2 48/3000/35 installed in my off-grid cabin setup, running off a 48V 200Ah lithium pack (Lifepo4, 16-cell...
@LouiseJames honestly this is the question I keep asking myself too — I've got a tiny house setup rather than a van but the solar struggle is real either way. What's your panel angle like?
WD40Wizard23 in Q&A 3 weeks ago thumb_up 2
Last winter I had my 280Ah LiFePO4 bank trip offline twice during cold snaps — both times overnight when temps dropped to around 2–3°C inside my insulated battery box.
Nick Thompson in Batteries & BMS 3 weeks ago thumb_up 4
RobHenderson | 847 posts Worth adding to what @T5Solar said - check your BMV-712's Peukert exponent and charge efficiency factor settings.
Rob Henderson in General Chat 3 weeks ago thumb_up 8
Yeah this is a known quirk with lithium in cold weather. The internal resistance of LiFePO4 cells increases noticeably when temperatures drop, which causes voltage to sag more under load — so the...
Thommo53 in Q&A 3 weeks ago thumb_up 9
TracyMitchell | 189 posts | Location: on the water Been running a 48v setup on my boat for two years now — the cable sizing alone made it worthwhile.
@Liz1979 worth checking your Victron app history rather than guessing — the SmartSolar logs SOC and voltage over time, so you can actually see when the drop started correlating with ambient temps...
CurrentAffairs in Q&A 3 weeks ago thumb_up 6
Swapped out my old AGM setup for a pair of Fogstar Drift 100Ah lithiums last spring and honestly thought I'd cracked it — proper smug about it for about three weeks. Then my Victron SmartSolar...
Alex Hobbs in General Chat 3 weeks ago thumb_up 4