Anyone else running Fogstar Drift lithium in their van? Curious about charge settings

Picked up a pair of Fogstar Drift 100Ah cells back in April and wired them in parallel for a 200Ah bank in the Transit. Been running them through a Victron SmartSolar 100/30 and so far the whole setup has been solid — no complaints on the solar side.

What I'm less sure about is the charge profile. I've got the Victron set to 14.2V absorption, 13.5V float based on what I've seen kicked around on various threads, but Fogstar's own docs seem a bit vague. Some folk say these cells are happiest not pushing them to 14.6V, others reckon you're leaving capacity on the table if you back off too much.

Also wondering how people are getting on with the Bluetooth BMS that ships with the Drift. Mine drops connection every couple of days and I have to power-cycle it. Mildly annoying when you're trying to keep an eye on cell balance on the road. Is that a known quirk or have I just got a dodgy unit?

KarenEvans | 📍 Yorkshire | ⚡ Transit Custom 180Ah LiFePO4

@Jock nice setup! I've got a single Drift 100Ah in my Custom and the Victron pairing works a treat.

For your SmartSolar settings I'd suggest:

• Absorption: 14.2V
• Float: 13.5V
• Absorption time: keep it short, maybe 20-30 mins max

The Drift cells have their own BMS so don't stress too much about over-charging, but keeping float conservative really helps longevity. Some folks run float as low as 13.3V which is fine if you're plugged in long-term.

One thing worth doing - enable the battery temperature sensor if you haven't already, especially heading into winter. LiFePO4 really doesn't like charging below about 5°C and the BMS will disconnect before damage occurs anyway, but better to avoid the situation altogether.

How are you finding the parallel wiring holding up?

Running mine at 14.2V absorption and 13.5V float in the tiny house rig — Fogstar's own docs say 14.6V max but I've kept it conservative and the Victron BMS integration keeps everything from getting sweaty. 🧊

Wardy16 | 📍 Derbyshire | ⚡ Sprinter 200Ah Fogstar Drift

Got the same cells in my Sprinter — cracking batteries for the money. I've settled on 14.4V absorption as a happy middle ground; pushes them a bit harder than @WattSue's 14.2V but stays comfortably below the 14.6V ceiling. Absorption time I keep fairly short, around 20-30 minutes once it hits that voltage. Float I've dropped right down to 13.4V as these LiFePO4 cells really don't need much float at all — some folks argue you should disable float entirely and just let the BMS handle it.

Worth double-checking your parallel connections are properly balanced before assuming the readings are accurate, @Jock. Two cells in parallel can mask an imbalance if your cabling isn't matched length. What gauge cable are you running between them?