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<br /> <br />7 <br /> <br />INVERTERS AND SWITCHGEAR <br />The solar facility will include inverters to convert the variable direct current (DC) output of the <br />solar panels into the alternating current (AC) power that utilities use to deliver power. Each of <br />the inverters will be housed within a single purpose-built <br />steel housing to be placed on top of a concrete slab. <br />Switchgear will be installed for safety and maintenance <br />to electrically control, protect, and isolate sections of the <br />solar array. The switchgear will also be constructed on <br />a concrete slab. While the exact size of these pads will <br />be determined by final equipment selection and utility <br />requirements, the current design calls for ~7’ x ~12’ <br />concrete pads. <br />ELECTRICAL COLLECTION SYSTEMS <br />All the wiring for the solar panels and the low-voltage runs to the inverter/switchgear station will <br />be either underground or in a conduit mounted to the support structure of the array. From the <br />inverters and switchgear, an underground medium voltage electric line will be constructed to <br />Xcel’s electrical interconnection infrastructure. <br />ELECTRICAL INTERCONNECTION INFRASTRUCTURE <br />The Project will connect to the existing Xcel Energy distribution line and right-of-way located on- <br />site. The Project proposes a line tap of the above ground distribution line located at <br />approximately 45.021274° north latitude and -92.884682° west longitude located south of 50th <br />St. N. As shown in the Site Plan provided at Appendix C, the Applicant anticipates Xcel Energy <br />will require up to three new aboveground poles for their electrical equipment to support the <br />interconnection. The access road will be co-located with the point of interconnection to allow <br />Xcel Energy access for maintenance. <br />No other additional utilities or public services, such as septic system or public water service, are <br />required or proposed. The location of existing public utilities are noted on the Site Plan in <br />Appendix C. <br />SECURITY FENCING <br />Security fencing will be installed and located as shown on the Site Plan to encompass all solar <br />Figure 4. On-site electrical infrastructure <br />