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Standby generators regularly run in the 30% region. They are sized for in rush current.
Gen size = voltage * inrush current(s) * (100 - allowable voltage say in %).
Typical allowable voltage sag is 20-30% depending on the device.
In rush is 3-5 times the operating current, unless you use a soft starter or VFD.
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James
The pessimist complains about the wind; the optimist expects it to change; the engineer adjusts the sails.- William Arthur Ward (1921-1994)
Red-beard for President, 2020
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