ðɪ ˈaʊtpʊt fɹˈiːkwənsi ænd wˈeɪvfɔːɹm əvən ɪnvˈɜːɾɚ mˈeɪ nˌɑːt ˈækjʊɹətli ɹˈɛplᵻkˌeɪt ðæt səplˈaɪd baɪ mˈeɪnz ᵻlɛktɹˈɪsᵻɾi, ɔːlðˈoʊ ðɪs ɪz nˌɑːt jˈuːʒuːəli ɐ pɹˈɑːbləm.
The output frequency and waveform of an inverter may not accurately replicate that supplied by mains electricity, although this is not usually a problem.