Preview of IEEE Presentation Electrical energy cost for the past 20 years Energy cost projected for 25 years Colorado Renewable Portfolio Standard Springs Utilities rebate program Federal tax credits Case study – 25 kW system Questions

Colorado Commercial Electric Rate Increases

Colorado Commercial Electric Rate Increases compared to CSU

Relative % Increase

25 Year Price Projection

Colorado Amendment 37 passes November 2, 2004 “In a major victory for renewable energy advocates in Colorado, voters in the state approved Amendment 37 on Tuesday's election day. This is the first time in the Nation's history that a renewable energy portfolio standard was put directly before voters rather than processed through a state's legislature.” Source: renewable-energy-standard-17736

Many enhancements to Amendment 37 –HB : Expansion of Renewable Energy Portfolio Standard to 20% by 2020; To Include Co-ops and Muni's –SB : Established Clean Energy Fund in the Governor’s Energy Office –SB : Limitation of City & County Permit Fees for Solar $500 residential:$1000 commercial –GOV. RITTER CONGRATULATES LAWMAKERS, COALITION OF ENERGY COMPANIES AND ENVIRONMENTALISTS FOR PASSING HOUSE BILL 1365 Gov. Bill Ritter today thanked lawmakers, a coalition of energy companies, environmentalists and Xcel Energy for their support in passing House Bill 1365, the Clean Air-Clean Jobs Act. The bill has bipartisan sponsorship with Reps. Solano and Roberts and Sens. Whitehead and Penry. This historic legislation will cut air pollution, create jobs and increase the use of cleaner energy sources.

Colorado Springs Utilities Renewable Energy Portfolio Standard –2008 Electric Integrated Resources Plan Colorado Springs Utilities’ Electric Integrated Resource Plan (EIRP) is a long-term strategic plan used to guide resource acquisition, conservation and demand-side management decisions to meet customer electric demand through the year The RPS requires Colorado Springs Utilities to generate one percent of retail sales from renewable resources starting in 2008, three percent in 2011, six percent in 2015, and 10 percent in With the existing renewable resources and purchased Renewable Energy Credits (RECs), Colorado Springs Utilities will meet the RPS through Source: Colorado Springs Utilities 2008 Electric Integrated Resources Plan

Colorado Springs Utilities Renewable Energy Portfolio Standard –2008 Electric Integrated Resources Plan Colorado Springs Utilities’ Electric Integrated Resource Plan (EIRP) is a long-term strategic plan used to guide resource acquisition, conservation and demand-side management decisions to meet customer electric demand through the year The RPS requires Colorado Springs Utilities to generate one percent of retail sales from renewable resources starting in 2008, three percent in 2011, six percent in 2015, and 10 percent in With the existing renewable resources and purchased Renewable Energy Credits (RECs), Colorado Springs Utilities will meet the RPS through Source: Colorado Springs Utilities 2008 Electric Integrated Resources Plan

CSU Rebate Program $600K Funding for 2010 fully reserved by January 2010 $3.00 per AC Watt up to 10K residential & 25K for commercial Governors Energy Office program begins on April 19, 2010 –Residential: $1.50 Watt for the first 3 kW – $4,500 –Commercial: $1.50 Watt for the first 10 kW – $15,000 Federal Tax Rebate 30% of total system cost

Economics of Solar PV Systems

Economies of Scale Utility scale systems take up acres of land –Require more complex permitting –Funding and or Power Purchase Agreement Commercial scale systems usually roof mounted –Dan Ritt kW ground mount –O’Briens Carpet One & Dobbin roof mount Residential for Early Adopters –Permitting easy but time consuming

Case Study 1 25 kW flush roof mounted system –Shake shingle roof had to be replaced –Orientation & Tilt 180 degrees South 3/12 or 25 degrees tilt Shading Issues –Adjacent trees –Cheyenne Mountain

Case 1 – Orientation to South

Shading Issues

Solmetric SunEye

Solar Access

Solar Report

Winter Solstice Animation

Summer Solstice Animation

Return on Investment

Engineering & Permits –State Licensed Structural & Electrical Engineers Art of Engineering – Scott Harvey Plant Engineering – Vern Plant –Permits Pikes Peak Regional Building Department El Paso Counting Zoning –Initial Module & Inverter Design Online string calculators

Online String & Inverter Calculators

Case Study 1 – Structural Drawing

Case Study 1 – Electrical Drawing

Boots on the roof

Case Study 1 – Work in progress

Case Study 1 – Inverters

Case Study 1 – Finished Product