mioelettriche
Mioelettriche is not a standard term in Italian-language reference works and does not designate a widely known organization, concept, or person. The form resembles a concatenation of the possessive determiner mio and the feminine plural elettriche, but it is not grammatically correct in ordinary Italian when used as a possessive phrase. In Italian, possessive determiners agree with the noun they modify; for example, mie elettriche would be correct for “my electric devices” referring to feminine plural nouns, or mii apparecchi elettrici for masculine nouns.
Possible interpretations of the string include a typographical error or experimental branding, a proper noun used
If a particular context or source exists, it would provide the basis for a more precise article.
See also: Italian grammar, branding and naming conventions, fictional terminology.