EcoWorthy 10kw 48v off grid inverter noise level

Had one of these running in my workshop for about eight months and the fan noise is the thing that'll either make or break it for you, honestly.

Out of the box it fires up the cooling fan almost immediately under any decent load — we're talking audible from a few metres away. Not jet-engine territory, but if you're planning to mount it inside a living space or a quiet cabin, you'll notice it. Mine sits in a detached outbuilding so it doesn't bother me, but I've read a few accounts of people who stuck them in utility cupboards and regretted it.

The thing is, a lot of inverters in this price bracket behave similarly. My old Renogy unit was just as vocal. The Victrons I've used run noticeably quieter, but you're paying a significant premium for that privilege.

What I'd suggest:

• Mount it somewhere ventilated but away from living areas if you can
• Check the fan isn't obstructed — mine picked up a vibration rattle around month three that turned out to be a loose mounting screw rather than the fan itself
• Some people have modded the fan entirely with a quieter 12v replacement, though obviously that voids any warranty you've got left

The real question is what your setup looks like. Are you running it continuously or just for peak loads? Mine rarely kicks into full noise mode because my Fogstar 48v lithium bank handles most of the steady draw smoothly and the inverter only really works hard during the kettle-and-toaster moments.

Would be curious whether others have found the noise changes noticeably between firmware versions — I've seen that mentioned but never confirmed it myself.

@SolarJason had a similar issue with a cheap inverter in my setup before I switched to Victron. The constant fan noise drove me mad in the end.

Worth checking if there's a fan speed setting in the menus - some of these budget units have a threshold temp you can adjust before the fan kicks in hard. Might just be poorly calibrated from the factory.

Also where's it mounted? Concrete walls can amplify that drone something awful. Stuck mine on rubber anti-vibe mounts and made a noticeable difference even before I sorted the actual fan issue.

If it's unbearable long-term, a fan replacement with a quality Noctua equivalent (with a suitable adapter) is a popular mod on these Chinese units. Bit fiddly but people swear by it.

@SolarJason is the fan noise consistent or does it ramp up under load? Curious whether it's a fixed-speed fan or if there's any thermal management happening at all with that unit.

I've got a Victron Multiplus in my setup which only kicks the fan on under heavier loads — makes a big difference for livability. Wondering if something like the EcoWorthy is just running the fan flat-out regardless of temperature as a cost-cutting measure.

Has anyone tried replacing the stock fan with a Noctua or similar quieter unit? I've seen people do that mod on cheaper Chinese inverters with decent results. Would that even be practical on this particular model or is the housing awkward to get into?

Mine ran so loud in the garage that the neighbours thought I'd started a wind farm — switched to a Victron Multiplus and now the only thing keeping me up at night is the electricity bill.

@George1972 raises the exact question I'd want answered. On my narrowboat I trialled a similar budget inverter before settling on a Victron Multiplus, and the fixed-speed fan was genuinely the dealbreaker — not the decibel level itself, but the constant drone at anchor that seeps into everything.

If EcoWorthy's fan is load-responsive, that changes the conversation entirely. A fan that spins up hard under a kettle load and then settles back down is liveable. One that hammers away at idle while you're trying to sleep three feet from it is not.

Worth grabbing a cheap sound meter app and logging it at various loads — 10%, 50%, full tilt. That data would actually be useful for people like me weighing up whether these make sense for live-aboard situations versus a workshop where background noise is already there.

Actually worth adding from my own experience with the EcoWorthy — the fan behaviour does seem to change over time. Mine was noticeably louder in the first couple of months, then settled down a bit once everything had bedded in. Not sure if that's normal wear or just the thermal paste distributing properly.

One thing nobody's mentioned yet is placement making a massive difference. I relocated mine from a corner to a wall-mounted position with proper clearance all round and it made a surprising difference to how often the fan kicks into high gear. Better airflow in, less heat buildup, calmer fan.

@CarlCole97 if you're narrowboat-based, the confined space will absolutely amplify whatever noise it does make, so worth factoring that in before committing to one of these units.