Anyone else running a 24v system with cheap Chinese LiFePO4 cells — worth it or a headache?

So I took the plunge last autumn and built a 24v 200Ah bank from raw EVE 280Ah cells off AliExpress. Total cost was around £380 including the JBD 100A BMS, which felt almost suspiciously cheap compared to the branded stuff. Been running it through the winter in my Transit conversion with a Victron SmartSolar 100/30 and a Renogy 200W panel on the roof.

Honestly, it's been largely fine — cells balanced well after the initial top balance, BMS hasn't thrown any tantrums, and I'm seeing genuine usable capacity that absolutely wrecks my old lead-acid setup. But I did have one slightly sketchy moment in January where the BMS cut out at -3°C overnight and I woke up with no 12v (well, 24v stepped down) for my heating. Turned out low-temp protection kicked in, which is technically doing its job, but still not ideal when you're in a layby in Shropshire.

Has anyone else gone the DIY cell route rather than buying a complete battery like a Fogstar or Epoch? I'm curious whether people are adding self-heating pads to their builds for winter use, or just accepting the cold-weather limitations. Also wondering if a 24v to 12v Orion-Tr is genuinely worth the money over a basic DC-DC converter from Amazon.

Hey @MistyNomad, snap! Running virtually the same setup here — EVE 280Ah cells in a 24v configuration with a JBD BMS. Mine's been ticking along nicely for about 14 months now.

One thing I'd flag that I don't see mentioned enough: top balancing before first use is absolutely critical with these cells. I spent a weekend doing it properly and honestly think that's why mine have been so well-behaved since.

The "suspiciously cheap" feeling never fully goes away does it 😄 but the EVE cells specifically have a decent reputation — they're actually used in quite a few commercial builds. Just make sure you've got your BMS parameters set correctly for charge cutoff voltages. JBD's PC software is a bit rough around the edges but it does the job.

What inverter are you running with it?

Hey @MistyNomad! I've got a similar setup running since early last year and honestly it's been brilliant once properly commissioned. One thing neither of you have mentioned — did you top-balance your cells before first use? I skipped this step initially and had the BMS tripping constantly until I sorted it. Takes a few hours but makes a massive difference to how evenly the pack behaves long-term. Also worth checking your cell interconnect torque periodically; mine worked loose over a bumpy winter and caused some resistance issues. The EVE cells themselves seem genuinely solid quality — I've had zero capacity concerns. What capacity are you actually seeing in real-world use? I'm getting around 185-190Ah usable which I'm perfectly happy with at that price point.

Been running EVE cells for about 18 months now — slightly different configuration, 8 cells in series for 24v with a Daly BMS rather than JBD, but similar ballpark cost.

One thing nobody's mentioned yet: top balancing before first use is absolutely critical with these cells. Mine arrived with wildly different state of charge between cells and I nearly had grief early on because I rushed that step.

Also worth checking your cell internal resistance with a proper meter when they arrive. Had one batch where a single cell was noticeably higher than the others — seller replaced it without much fuss once I had data to back up the claim.

@MistyNomad £380 all-in is genuinely impressive. What grade cells did you get — A grade or B? Makes a difference to long-term capacity retention in my experience.

Built my static caravan setup around 8 × EVE 272Ah cells (slightly older batch) in a 24v config about two years back now. The part nobody really warns you about is top balancing before first use — spent an embarrassing weekend scratching my head wondering why my Victron SmartShunt was reading nonsense, turned out two cells were wildly out from the factory.

Worth adding to what @LutonDream said about the Daly — I eventually swapped mine for a Seplos BMS purely for the CAN bus integration with the Victron kit. Night and day difference in monitoring.

The cells themselves? Genuinely solid. Cold winter mornings in the van, dipping to maybe 3°C inside, and they've never complained. Just make sure your compression jig is decent — foam padding from B&Q and some threaded rod does the job fine.

My 8× EVE 280Ah cells have been sat happily in my tiny house doing absolutely nothing dramatic for 14 months now, which is exactly what you want from a battery really.

One thing nobody's mentioned — top balancing before first use is the difference between a system that works and one that keeps you up at night wondering why cell 3 is being funny. Did mine with a bench power supply and a pot of tea; took an afternoon but worth every minute.

Pair it with a Victron SmartShunt and you'll actually know what's happening rather than just hoping for the best — the JBD app is fine but Victron's data logging is on another level for spotting early drift between cells.

£380 for 200Ah usable at 24v is frankly embarrassing value if you do the prep work properly.

Great thread! I've had a similar setup running for just over a year now — 8× EVE 280Ah in 24v with a JBD BMS, and honestly the main thing I'd flag that nobody's mentioned yet is cell matching before you build. I bought a basic capacity tester off Amazon for about £35 and ran every cell through it before assembly. Two of mine were noticeably underperforming compared to the rest — not dramatically, but enough that I'd have had balancing headaches down the line. Worth every penny of that £35. Also make sure you're torquing the busbars properly; I've seen people on here mention loose connections causing resistance issues. @MistyNomad — what BMS settings are you running for your charge cutoff voltage? That makes a surprising difference to long-term cell health.

Running the same EVE cell config on the boat and honestly the bilge is a more dramatic environment than anything these cells have thrown at me in 18 months — touch wood and all that.

One thing nobody's mentioned: top balancing before first use is non-negotiable unless you enjoy watching your BMS have an existential crisis at 3am when you're anchored somewhere inconvenient.

Fogstar do pre-tested cells if the AliExpress lottery gives you anxiety, though your wallet will know about it.

The real headache wasn't the cells — it was convincing my Victron Multiplus that a £380 battery deserved its respect, but once I tweaked the charge profile it's been smoother than my narrowboat's journey through a lock on a Sunday afternoon.