The Holy Spirit
The Augsburg Confession states:
Article V: Of the Ministry.
"That we may obtain this faith, the Ministry of Teaching the Gospel and administering the Sacraments was instituted. For through the Word and Sacraments, as through instruments, the Holy Ghost is given, who works faith, where and when it pleases God, in them that hear the Gospel, to wit, that God, not for our own merits, but for Christ's sake, justifies those who believe that they are received into grace for Christ's sake.
They condemn the Anabaptists and others who think that the Holy Ghost comes to men without the external Word, through their own preparations and works."
Again the Augsburg Confession states:
Article XIV: Of Ecclesiastical Order.
"Of Ecclesiastical Order they teach that no one should publicly teach in the Church or administer the Sacraments unless he be regularly called.
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7. Can lay people consecrate the Lord's Supper?
If the choir can consecrate the Lord's Supper why can't the congregation read the words of institution out loud in the church service?
Walther says the lay people should not consecrate the elements of the Lord's Supper. However, if a layman did consecrate the Supper, Walther writes: "No one doubts the administration of the holy Supper by a layman who had been temporarily called by a whole congregation in an emergency, although not ordained, would be valid and legitimate...But in this way the layman is administering it not as layman but as a minister who has been truly called for a time." Page 136.
Again we note that whoever consecrates the Lord's Supper must do so with a call from the congregation. The pastor has no authority to grant the duties of his office to another. Such an action takes the authority to issue a call from the Voters' Assembly.
From
THIS ARTICLE
So, in other words, the person doing the consecration must be called by the congregation, not by the pastor and not by his own actions. So the way I read it, no, you could not consecrate a Eucharist at home as no congregation has called you to do so.