Standby Power Rating
The primary application of a Standby Power Rated generator is to supply emergency power for a limited duration during a power outage. These generators do not have an overload capability built into the units. Standby power rating should be applied to the unit where public utility power is available and power cuts are very rare.
Prime Power Rating
The prime power rating is the maximum power accessible at the variable load for an unlimited number of hours per year in a variable load setting. Prime power rated generators should be used if the public utility power is intermittent with frequent power cuts.
Continuous Power Rating
Continuous power rating is used in applications where the need for supplying power is at a constant 100% load for an unlimited number of hours each year. These units are used in applications where the power grid is unreachable, for e.g.: mining, agriculture or military operations.
Elevations and Temperature’s Effect on Power Rating
Beyond the above mentioned considerations, elevation and temperature are also factors to be considered before rating the engine.