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It’s going to depend on the size of rides and the size of the park in general. In the US, electricity costs are measured through the units of kilowatt-hours. The kilowatt-hour is defined as the usage of a device rated at a kilowatt (1000 Watts) for a consistent time period of an hour.
For example, if a furnace is rated for a kilowatt and runs for an hour, it uses a kilowatt of electricity. If a television rated for 100 watts runs for 10 hours, it would also use a kilowatt hour. It costs an average of 12 cents per kilowatt hour.
Let’s take a look at an actual situation regarding an amusement ride…
The HUSS Top Spin ride is rated for 220 kW. If this ride were to run at this rate for a 12 hour day, it would cost $316.80 in electricity. Keep in mind that the ride will take more power while in the ride cycle, than while loading/unloading. But this is a very basic, crude estimation for the maximum amount of electricity used.
To find the total amount of electricity needed to run a park, you would need to sum all of the running costs per ride.