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<br />Utility Construction Costs
<br />Any greenfield construction project has multiple options for utility power. The local utility company can
<br />provide dedicated power to the site or construct an onsite substation. However, the cost models are very
<br />different between the two options. While many variations exist, a standard set of variables was assumed
<br />in both cases to make the illustration clear.
<br />Assumptions
<br /> The utility voltage provided is all 480V
<br /> The size of the transformer is 1,500kVA, at the cost of $37.5K each
<br /> Due to the range in outcomes of the two models below, an average cost of $150/kW was
<br />used in the project economics
<br />Utility Provided Power
<br />Using this model, the utility company will provide all the necessary equipment and services to
<br />construct, trench the lines, and land power at the site. This option has a lower cost of entry but
<br />does not scale as efficiently as an onsite substation. As shown in the chart below, the cost climbs
<br />quickly
<br />Capacity (MW)3713172733
<br />Capital (M)75,000$ 915,000$ 1,700,000$ 2,745,000$ 3,660,000$ 4,575,000$
<br />Distance (mi)0.02.72.72.72.72.7
<br /># Xfmrs259121822
<br />Xfrmr Volts (V)480480480480480480
<br />Xfrmr Size (A)150015001500150015001500
<br />Cost per Xfrmr37,500$ 37,500$ 37,500$ 37,500$ 37,500$ 37,500$
<br />Total Buildout150,000$ 1,102,500$ 2,037,500$ 3,195,000$ 4,335,000$ 5,400,000$
<br />Cost per Unit (kW)50$ 158$ 157$ 188$ 161$ 164$
<br />
<br />Onsite Substation
<br />Under this model, approximately half an acre would need to be set aside to construct the
<br />substation. This model has a much higher upfront cost due to the substation's initial $1.5M
<br />construction. However, this model is much more cost-effective over the long term.
<br />Capacity (MW)3713172733
<br />Capital (M)1,500,000$ 1,500,000$ 1,500,000$ 1,500,000$ 1,500,000$ 1,700,000$
<br /># Xfmrs259121822
<br />Xfrmr Volts (V)480480480480480480
<br />Xfrmr Size (A)150015001500150015001500
<br />Cost per Xfrmr37,500$ 37,500$ 37,500$ 37,500$ 37,500$ 37,500$
<br />Total Buildout1,575,000$ 1,687,500$ 1,837,500$ 1,950,000$ 2,175,000$ 2,525,000$
<br />Cost per Unit (kW)525$ 241$ 141$ 115$ 81$ 77$
<br />2020 MTC DCLM DC Model (1) Page 19 of 20
<br /> 2020 Excipio Consulting, LLC. All Rights Reserved. This document is proprietary and confidential and may not be duplicated,
<br />redistributed, or displayed to any other party without the expressed written permission of Excipio Consulting LLC.
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