4 volts = 4,000 mV.
about 0.5 volts per potato (big one)
Two wires are needed for 220 volts.
The formula you are looking for is I = W/E. Amps = Watts/Volts.
At 120 volts it will pull 4.166 amps. At 240 volts it will pull 2.08 amps.
45 volts
1000
230 Volts
Zero volts.
1.55 volts
230 volts
4160 volts
neither...it should have 14.63 volts
3 Kv = 3,000 volts.
12 volts.
1 megavolt = 1,000,000 volts
2 volts