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mcduman avatar image
mcduman asked

THD (Total harmonic distortion) figures

Hi. I am looking for the thd figures of inverters and could not see them in the datasheets. Many thanks

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Danakil avatar image
Danakil answered ·

Hi mcduman,

The harmonics are created by your lines and your loads, not by the inverter, that's why there is nothing in the Victron's datasheet.

Set-up a power line anlyser with THD like this one: https://www.chauvin-arnoux.com/sites/default/files/D00QPA50_4.PDF

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mihair avatar image mihair commented ·

That is not true as there is no such thing like perfect pure sine output inverter, hence 0%THD.

The best power inverters are under 3% THD measured on pure resistive load.

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Danakil avatar image Danakil mihair commented ·

Yes you totally right, I forgot about these ones and misread the questions

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JohnC avatar image
JohnC answered ·

Hi Mc. i knew I'd seen them somewhere before, so I went for a look. You're right about them not being in the 'consumer' spec sheets, but seem to be available in the Tech Details section of the relevant model's manual.

< 5% seems to be a common figure, but I did spot one that said < 3%.


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mcduman avatar image mcduman commented ·

thanks for looking. i know < 3% is as good as it gets. however it seems i am unable to locate this spec in the user manual either. there is ac output tolerance which is +/- 3% but this is not what i am looking for.

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