Fogstar Drift vs. second-hand Victron LiFePO4 — which would you actually choose on a tight budget?

Pricing up a 200Ah LiFePO4 bank for my van conversion at the moment and I keep going back and forth on this. A brand-new Fogstar Drift 200Ah is sitting around £299 right now, which honestly seems hard to argue with for a Grade A cell pack with a proper BMS. But I've also spotted a couple of second-hand Victron 200Ah Smart LiFePO4 units on eBay for around £350–£400 — aged maybe 2–3 years, unknown cycle count, and the sellers are a bit vague about history.

The Fogstar has the obvious appeal: new cells, known state, warranty (however much that's worth when you're living mobile). The used Victron wins on Bluetooth monitoring and native integration with the rest of my system — I'm running a Victron SmartSolar 100/30 and a Multiplus-C 12/800, so DVCC and proper BMS comms would actually be useful rather than just nice-to-have. That said, Fogstar's BMS does support a VE.Bus-style comms setup via a separate CANbus adapter, though I've not seen many real-world write-ups on how reliable that is day-to-day.

Has anyone actually run the Fogstar Drift long-term in a van environment — vibration, temperature swings, the usual abuse? Equally, if you've bought second-hand Victron lithium, how did you verify cycle count and cell health before handing over the cash? Is there a way to pull that data via VictronConnect or does it depend entirely on the seller's honesty?

Really good timing on this thread @WayneJames — I went through exactly this decision last spring for my Luton build.

Personally I'd lean Fogstar Drift new over second-hand Victron, and here's my reasoning: with used Victron you genuinely have no idea how many cycles it's already seen or whether it's been properly managed. A battery that's been sat in someone's boat for three years connected to a dodgy charger could be significantly degraded.

The Drift at £299 gives you a known baseline, a warranty, and Fogstar's UK support is actually decent from what I've experienced.

That said, if you can verify the Victron's history — ideally pull the data from the BMS — and the price is substantially lower, that changes things. But "substantially" to me means at least 40% off equivalent capacity, not just a tenner saved.

Been down this exact rabbit hole when I spec'd out my static caravan build last year.

The Fogstar Drift is genuinely tempting at that price point — I nearly pulled the trigger myself. But here's the thing with second-hand Victron: you can actually verify what you're buying. Pull it up in VictronConnect, check the cycle count, battery health, the full history. That transparency changes the risk calculation completely.

With a mystery Drift off a private seller? You're just trusting someone's word.

That said, brand new Drift at £299 is a different conversation entirely. Fresh warranty, no hidden abuse, proper BMS from the off.

My honest take: second-hand Victron only if the seller lets you interrogate it with the app before handing over cash. Otherwise the Drift new wins on budget builds every time. @LutonDream probably saw similar when speccing that Luton — what condition was yours in when you got it?

Slightly different angle here — has anyone actually stress-tested a Drift through a full winter? That's the bit I keep wondering about for my shepherd's hut build.

The Victron second-hand route makes me nervous purely because battery provenance is basically a mystery. Was it in a van that got nicked? A boat that sat damp for three years? You just don't know.

With the Drift at £299 you at least know what you're buying — fresh cells, known history, warranty you can actually claim.

My one question for @WayneJames though: are you planning any future expansion? Because if there's even a chance you'll want to add a second 200Ah later, matching cells from the same manufacturer matters more than people realise. Mixing batches of second-hand Victron is a proper headache I'd rather avoid.

Great thread @WayneJames. One thing nobody's mentioned yet — with second-hand Victron you're often buying someone else's unknown cycle history. Even a battery that looks immaculate could have 500+ cycles on it already. At least with a new Drift you're starting fresh with a known baseline.

That said, if you can find a second-hand Victron with documented purchase history and ideally some BMS data showing actual capacity, that changes the calculation considerably.

For a van conversion specifically, I'd lean Drift. Weight and space are at a premium, and the Drift's relatively compact form factor works nicely in tight builds. The Victron ecosystem integration is lovely but honestly not essential at your scale — a decent Daly or JBD BMS gets you 90% there for a fraction of the cost.

What's your solar and charging setup looking like? That might affect the answer.

Good point from @KarenWebb there. I'd add that with second-hand Victron LiFePO4 you're also inheriting an unknown charge/discharge history, and unless the previous owner kept meticulous records you've genuinely no idea how many cycles are on those cells. Victron's BMS will log a fair bit but not everything.

That said, £299 for a brand-new Drift with a proper warranty and known cycle count of zero is hard to argue against on a tight budget. For a van conversion especially, I'd lean Drift — you want something you can trust from day one without faff.

If it were a fixed installation with easy access I might take a punt on second-hand Victron, but mobile builds get vibration, temperature swings, and awkward angles. New wins there in my opinion.