Buzzing LED battens on inverter.

[ellal]

I've just replaced some LED battens in my workshop which run off a solar panel via battery and inverter.

Both of them buzz, whereas the previous ones didn't. Put them on the mains circuit and no buzz.

First question is what is causing this, and is there anything I can do to eliminate the buzzing sound?

Second question is that the buzzing is not that annoying given the setting and the inverter fan noise, but will this cause damage to the battens?
I normally associate this type of buzzing sound with a possible failure to come.

Cheers

 

[Ragnar_AT]

Do you know the model of inverter? It sounds like the inverter doesn’t produce a true sine wave and that causes the ballast electronics to oscillate. That might lead to overheating so not ideal.

 

[ellal]

Bestek 400W MRI4013IU

I can't find any details saying it is true sine wave, but puzzling that the previous battens didn't have the same problem.

Same make of batten, just upgraded from 3x45W to 3X60W because I needed a bit more light.

 

[bernardgreen]

It sounds like the inverter doesn’t produce a true sine wave

The Bestek 400W (Model MRI4013IU) is a modified sine wave inverter, not a pure sine wave unit. It converts 12V DC to 230V/240V AC and is designed for charging laptops, cameras, and powering small electronics. Because it uses modified sine wave technology, it may be less efficient or noisy for sensitive inductive loads like some motors or medical equipment.

 

[ericmark]

As said

simulated sine wave, a one to one isolating transformer will likely stop the problem, if it is a problem. Most power supplies turn the AC into DC, and charge a capacitor, then turn the DC back in to AC at a high frequency, so a smaller transformer can be used, then transform it down to the voltage required, turning back into DC and sampling the voltage which will alter the mark/space ratio when turning into AC and so correct the voltage, or with LED the current to what is required.

In the main this means the voltage and type of sine wave don't matter, as first thing it does is turn the AC to DC, but there are always exceptions.