An electrician is required to conduct a load test to ensure you can make an informed purchase decision that is based on your needed amperage per phase.
Generators are manufactured to run at 80% of their maximum output when at sea level and in a neutral climate. Factors such as altitude and temperature can affect the efficiency of your engine, therefore, creating less power.
Limitations of use:
Do not use more than 50% of your generator’s rated load for your “first step load”.
Do not use more than 75% of your generator’s rated load for your “Running load”.
These limitations are set to account for any spikes or drops in current that naturally occur in the combustion process of fuel-powered generators.