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He provided a rendering of Roseville City Hall with solar panels on the rooftop. <br />When roof repairs are needed, they can take the panels off, stack them near the <br />corners of the buildings to allow them to get at most of the roof. <br />Chair Cihacek inquired when the City will need to replace the roof. <br />Mr. Culver responded the roof on City Hall was refurbished in 2014 and they are <br />on a 20 -year life cycle before major repair is needed. With solar panels on the roof, <br />there is less wear. If they had 25 -year panels on the roof, they would try to delay it <br />as much as possible. If they did not have panels on the roof, it would be redone in <br />about 2036. <br />Member Wozniak inquired what the proposed size of this installation would be. <br />Mr. Weir responded the installation on City Hall would be about 204 kilowatts, on <br />Public Works it would be 299 kilowatts, and on the Skating Center it would be 230 <br />kilowatts. The total for all three buildings would be about 735 kilowatts. <br />Mr. Culver stated the Public Works roof is a little more complicated because it <br />consists of three different roof ages. The largest roof in the middle was redone in <br />2014 and the oldest part is scheduled for major reconstruction neat year. The <br />remaining part is scheduled to be redone in about 10 years. <br />Chair Cihacek inquired how they do roof maintenance. <br />Mr. Culver responded they do annual patching as needed. When it is replaced, they <br />remove all the rock, replace the liner, and reset everything. If there are solar panels <br />on the roof, they would have to be removed and then replaced after the work is <br />done. It usually takes one to two weeks to replace the roof but could possibly be <br />done in a more compressed time if needed. <br />Chair Cihacek inquired what the financial loss would be for the two weeks the solar <br />panels would be down and if it is possible to put them in ground applications during <br />that time. <br />Mr. Weir responded they have in their contract that for 72 hours there would be no <br />financial loss. After that they would factor in an average daily production lost. <br />They would not be able to install them on the ground that quickly and it would be <br />cost prohibitive to build something to hold the solar panel on the ground. <br />He continued his presentation and provided two offers to the City for a community <br />solar garden. One option would not involve any installed solar panels (off site <br />Community Solar Garden) and the other option would involve installing a <br />Community Solar Garden on the various rooftops with an added lease payment. <br />Xcel looks at the last two years bills and averages kilowatt usage hours and allows <br />Page 7 of 16 <br />