In the current economic conditions, controlling the cost of production becomes important. This simple image just serves to remind us that its not always the most obvious costs that are important.
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This is a simple PI graph of the total cost of ownership of an electric motor in the USA. Energy accounts for 97% of this cost while the original purchase cost represented only 2%.
So in this particular instance, it might be better to switch to more efficient motor if available, which tends to not be what we are thinking of when times are tight! If you were in South Africa it is even more worth considering, because Eskom subsidises the upgrading of motors as part of our electricity savings.