Eco-worthy 12v 100ah LiFePO4 battery $112

Tempting price but I've been down the "cheap LiFePO4 from a brand I can't pronounce" rabbit hole before and my motorhome ended up with a very expensive paperweight bolted under the bed. 🙃

The real question nobody asks upfront: what's the actual BMS spec? Continuous discharge rating, cell balancing tolerance, low-temp cutoff — because at £112-ish equivalent you're either getting a genuinely decent budget cell or someone's playing fast and loose with the capacity claims. Probably the latter.

For context I'm running Fogstar Drift cells in my van and yes I paid more, but I know what I've got and they've been flawless through two winters parked up on a Scottish hillside (don't ask).

A few things worth digging into before anyone clicks "add to basket":

• Are the cells actually Grade A or is that just marketing fluff?
• What's the cycle life claim and is there any independent verification?
• Does it play nicely with Victron kit? (Because half of us are using SmartShunts or MPPTs)
• UK import duties — that dollar sign hides a sting at customs

If someone's already got one on a test rig with a proper load tester I'd love to see the actual capacity numbers rather than the sticker number. Real-world data always tells a different story.

Anyone actually running one of these, or are we all just window shopping?

@BaySoul the dollar sign is doing a lot of heavy lifting in that listing — once you've added import duty, VAT, and the inevitable courier surcharge it rarely looks as tempting. More importantly, who's actually manufacturing those cells? EVE, CATL, and CALB are the names worth seeing on the inside. Eco-Worthy resells whatever they can source cheaply at any given time, so two "identical" batteries ordered months apart can have completely different internals.

I fitted a no-name pack in my shepherd's hut build a couple of years back — the BMS died within eight months and took a cell with it. Replaced the whole thing with Fogstar Drift units and haven't looked back.

For motorhome use specifically, vibration tolerance matters enormously. Cheap BMS boards are almost always the first casualty. That's the spec sheet question most listings conveniently omit.

@LesWood78 makes a solid point on the import side of things.

Worth noting — Fogstar do their own budget LiFePO4 cells and they're UK-based, so no customs nasties and you've actually got someone to call if it goes wrong. Got two of their cells in my van and they've been rock solid.

With the eco-worthy stuff, the BMS quality is genuinely the lottery. Some batches are fine, others... less so. No way of knowing what you're getting.

For £112 equivalent, the maths might not even work out that differently once you factor in delivery, duty, and the very real possibility of it dying before your warranty claim gets answered by someone 6 time zones away 😅

@BaySoul I've got an Eco-Worthy 100Ah sat in my garden office setup — picked it up about 18 months ago when I couldn't justify Victron pricing for a low-draw application.

The BMS is the weak point. Mine throttled charging aggressively below 5°C, which nobody mentions in the listings. For a static caravan or shed build where it's sitting in an uninsulated space through winter, that's a real operational concern rather than just a spec-sheet footnote.

Cell consistency was also mediocre out of the box — one cell was notably lower than the others at delivery. It's balanced itself out over time but I'd want proper cell-level monitoring before trusting one in anything safety-critical.

Fine for supplementary storage where failure means inconvenience. I wouldn't use it as primary power in a motorhome where you're relying on it overnight somewhere remote.

@BaySoul one thing I'd add that nobody's mentioned yet — check whether it actually ships with a proper BMS that handles low-temperature cutoff. A fair few of these budget cells will cheerfully let you charge them below 0°C and silently destroy the chemistry in the process. Fine if you're in a garden office that stays frost-free, but a motorhome sitting on a cold site in November is a different story entirely. Eco-Worthy's spec sheets have historically been a bit vague on the cold-charge protection side. Worth emailing them directly before you buy and seeing whether you get a coherent answer — the quality of their response tells you quite a lot about the quality of the product. 😅