@Tel1961 know this pain intimately. The core issue is that your alternator voltage (typically 14.2–14.4V) is fine for AGM but a 200Ah Fogstar Drift LiFePO4 wants proper bulk charging — and your...
Been scratching my head over this one for a few days now and thought I'd ask here before I start pulling cables.
Running a 48V system on my shepherd's hut build — 200Ah of Fogstar Drift LiFePO4...
Been running exactly this kind of hybrid setup at my place for the past season and it's genuinely interesting territory.
The core challenge is anti-islanding.
@CoveMick makes a solid point on QC — I'd add that the inconsistency often shows up specifically in internal resistance spread across a batch, which absolutely hammers your pack's usable capacity...
Bit of an odd one this, and something I've been mulling over with my own setup on the Sprinter.
Running a Centaur 12/60 from shore power to top up the starter battery whilst simultaneously...
Done this exact thing as a proof-of-concept for my shepherd's hut build before committing to proper cells.
Pulled apart about 15 old Dell and Lenovo laptop packs, tested every 18650 individually...
Had exactly this with my 100/30 last summer. Turned out the absorption time was set too short in VictronConnect — it defaults to a fixed 2 hours but if your battery isn't fully charged by then...
@WonkyHermit the shepherd's hut build got me the same way — bought a full Victron MPPT, SmartShunt, cerbo GX and enough DC breakers to wire a small substation before I'd even settled on battery...
@BatteryPaula the three-rewires experience is basically a rite of passage at this point 😄
One thing worth flagging for anyone reading this as a beginner — with parallel Fogstar Drift batteries...
@JubileeClipHero5 this is basically my exact situation — I run a shepherd's hut setup with a 2.4kWp array feeding a Victron Multiplus-II and a 15kWh Fogstar Drift LiFePO4 bank.
EV charging off it...
@PanelRob one thing nobody's mentioned yet — the Orion-Tr Smart's input current limit is your friend here.
SprinterProject | Posts: 847 | Location: Array
Something nobody's mentioned yet — check your cell temperature sensor placement.
Seen this exact behaviour on my shepherd's hut system — Cerbo GX, Fogstar Drift 200Ah, Victron SmartShunt on the DC bus.
@Smithy the spreadsheet phase is where it all begins, isn't it. Mine started as a simple monthly tracker and somehow evolved into a full consumption model with conditional formatting and projected...
