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Motor Energy Cost Comparison

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  1. This calculator allows users to compare the annual electricity costs for two electric motor options.
  2. The two motor options considered may operate for different hours per year and have different mechanical efficiencies.
  1. The electric motor mechanical efficiency is constant or the average mechanical efficiency is known.
Step 1: Motor Option 1
1.1 Hours per day of operation
1.2 Days per year of operation
1.3 Actual motor horsepower (rated conditions)
1.4 Motor efficiency (ie: 95%)
1.5 Cost of energy ($/KWh)
Step 2: Motor Option 2
2.1 Hours per day of operation
2.2 Days per year of operation
2.3 Actual motor horsepower (rated conditions)
2.4 Motor efficiency (ie: 95%)
2.5 Cost of energy ($/KWh)
Step 3: Solve
3.1 Proof steps
3.2 Solve for Motor Energy Cost Comparison