75 Amps theoretically Need to know if the generator is 3 phase or single phase.
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To find the amperage of a generator, you can use the formula: Amps = Watts / Volts. Assuming a standard voltage of 120V for household generators, you can calculate the amperage as: 8500 Watts / 120 Volts = 70.83 Amps.
In order to determine the amperage supplied by an 8000 watt generator, you need to know the voltage of the generator. You can calculate the amperage by dividing the wattage by the voltage. For example, if the generator operates at 120 volts, the amperage would be 8000 watts / 120 volts = 66.67 amps.
If you need 50 amps you can use a 60 amp generator or any other generator rated to supply more amps. The voltage, 110 v or 240 v, must be the right voltage for the load used.
Watts = Amps x Volts. Amps = Watts/Volts. 10000/120 = 83.3 amps can be used at 120 volts. On a generator that large it is most likely that it also has the capacity to produce 240 volts. 10000/240 = 41.6 amps can be used at 240 volts. What you can connect to the generator will be totals of the amperage of devices that do not go above these amp ratings.
Multiplying 400 volts by 45 amps would give you a power output of 18000 watts, which is equivalent to 18 kilowatts (kW).