I requested to run antminer machines on 220v and 240v. I asked several times the electrician to convert our electrical wires running to the antminer machine to run to 220-240 volts but it was done incorrectly. My brother as a witness heard the whole conversation. We showed him the machines and he didn't know what they were. He blatantly ignored the voltage facts and just ran the wires. 2 months later we noticed were getting high consumption on our electric bills and we found out the wires were not converted to 220 and it's still running under 110 volts.

He also overcharge me and did not mention the overcharge prior and stuck me with the bill

I would not recommend this electrician to anyone since he is incompetent and does not listen to customers.