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building. He indicated he would like to do one of the Solar Capacity Credit options either on City Hall or the maintenance building. Acting Chair Wozniak asked why they would not want to do both. Mr. Culver stated they could do both. Member Misra wondered if there was a trade-off if the City were to do both. Mr. Culver stated there was not. The City could use up to 120 percent of the power. They are obligating some of City Hall's energy to the Community Solar Gardens, so staff would need to keep an eye on that to make sure that between the two they are not exceeding the City's actual consumption by more than 120 percent. He thought the more systems they have the more roof tops they need to take up then the more risk there is from the standpoint of future roof maintenance or other damage. Mr. Culver thought if they got the solar rewards program and one of the larger systems in they can see how it goes and then if they like it and it is going well then, they can accelerate the skating center roof redo and get a larger system on the skating center in 2020. If the City is really in this the skating center is a preferable roof because of the amount of energy that is consumed in that building and the building will not be going anywhere for a long time. There was a short discussion regarding price increase of energy over a twenty-year period. Member Kruse asked if a full life cycle analysis of the system could be done and at the end of the life cycle what the cost of removal would potentially be. Mr. Chris Psihos stated in regard to O and M costs when there is a traditional solar array they are doing a straight O an M relationship on it. If the City were to look at someone to maintain the solar array it would cost the City $300 to $500 per year to pay for that and the savings on the solar array is around $5,000. The solar equipment is warrantied for 25 years. When the equipment does need to be disposed of, it is considered electronic waste (E - waste). The cost today is $15 to $20 a panel and charge by the pound. In todays present economy the cost would be around $10,000 to dispose of the equipment for a 40 -Kilowatt system. This would be the same cost as what would be saved in the year 25. This would be a swap in energy cost. He stated when they get past the point of transferring the ownership over, the only burden is the continued insuring of the item and dealing with the O and M and maintenance of the asset. Mr. Rich Ragatz stated after 25 years the equipment will still have 80% of the production output from the panels. He thought it would be doubtful that after the warranty is expired the City would want to dispose of the panels. The City would want to keep them up there because they are still producing or if the City did want to dispose of the panels there would be someone to take the panels off the City's hands.