Can't find UL listing for ECO-WORTHY 48V 100Ah Rack Battery

Mate, if you're hunting for UL listing on ECO-WORTHY kit you'll be searching longer than I spent trying to find a sunny day in Scotland.

Genuinely though, this is worth flagging — a lot of these Chinese-branded rack batteries floating around on Amazon and eBay carry CE markings but the UL certification is either absent, questionable, or points back to a shell testing lab that's basically a bloke with a multimeter in Shenzhen.

For what it's worth, my emergency backup setup runs Victron paired with Fogstar cells precisely because I wanted something I could actually verify — the paper trail matters when your insurance company starts asking awkward questions after a fire.

A few things worth checking on ECO-WORTHY specifically:

• Does the listing show a genuine UL file number you can verify at ul.com/database?
• Is the certification for the complete battery, or just an individual component inside it?
• Has anyone on here or diysolarforum actually traced a valid certificate?

If it's for a residential install, your DNO or building regs might care about this more than you'd expect — especially with rack-mount LiFePO4 sitting indoors.

Anyone else gone down this rabbit hole with ECO-WORTHY? Curious whether their newer 2024 batches are any different or still the same certification mystery tour. 🔍

@MultiPlusFan pretty much this yeah. ECO-WORTHY, Ampere Time, half a dozen others — CE marked but that's about it. CE self-certification isn't the same as third-party tested to UL1973 or even IEC 62619.

For static caravan/tiny house use it probably doesn't matter legally right now, but the moment you're dealing with insurance after a fire, they'll be looking hard at what's in your setup.

Personally went Fogstar Drift for this exact reason — proper documentation, and they actually answer technical questions. Costs more but I'd rather not argue with a loss adjuster.

Worth checking if your insurer even knows you have a battery bank. Most people haven't told them.

@RelayDream is right that CE is often the ceiling for these brands, but worth spelling out why UL matters beyond just a sticker — UL 9540A specifically covers thermal runaway propagation, which is the test that actually tells you what happens when a cell goes rogue inside a rack system.

For a garden office setup like mine, that's non-negotiable. My insurer explicitly asked about battery certification when I added the office to my home policy. Fogstar Drift cells (LFP, UK-stocked) or a proper Pylontech rack came up as acceptable; generic rack batteries with CE-only did not.

If budget is genuinely tight, at least cross-reference against whether the BMS has independent testing — some of the better Daly units do. But I wouldn't rack these in an enclosed space personally.

@AndyRobinson makes a fair point about why it matters, so I'll add the practical angle from my own setup.

Running a pair of rack cells in a static caravan — my insurer specifically asked for documentation on battery certifications before agreeing to cover the installation. CE alone wasn't sufficient; they wanted either UL1973 or IEC 62619. ECO-WORTHY couldn't produce either.

Ended up going Fogstar Drift, which at least carries IEC 62619. Not cheap, but when you're talking about an unoccupied structure sitting on a site for weeks at a time, the certification question stops being academic fairly quickly.

Worth checking your site's terms too — plenty of caravan parks have clauses that void occupancy agreements if non-certified energy storage is installed. Nobody reads those until there's a fire.

So what actually happens in practice if you're running one of these non-UL batteries in a static caravan and something goes wrong with your insurance claim? That's the bit nobody seems to answer properly.

@Compo you mentioned your own setup — are you on a site with any kind of electrical inspection regime? Because I've got a Victron Multiplus in mine and the site manager started asking questions when I mentioned I was adding rack batteries. Not sure if they can actually refuse me running them or just make noise about it.

Genuine question rather than being difficult — does CE certification satisfy most UK insurers for residential/leisure use, or are they specifically asking for UL/IEC 62619 now?