Energy
Input power, operating pumps, annual hours and tariff determine year-one energy cost. Future energy costs are escalated and discounted.

Compare two pumping alternatives using discounted capital, energy, maintenance, repair, downtime and replacement costs.
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Calculation basis
Input power, operating pumps, annual hours and tariff determine year-one energy cost. Future energy costs are escalated and discounted.
Planned maintenance, repairs, spares and estimated downtime consequences are included as recurring operating costs.
Replacement expenditure occurring within the study period is escalated and discounted. The lowest total present value is identified.