HomeMy WebLinkAboutCouncil Presentation 08/15/2017 - Solar Energy CouncilEnergy Savings from SolarAugust 15, 2017
Saving with Solar•Since 2007 in Arizona:–Increase in average utility rates: 37%–Decrease in solar energy prices: 31%•Town’s (2016‐17) cost of electricity: $1.1 MillionYear‐over‐year (2010‐17) increase varies: 1% to 12%•Cost Reduction Measures:–Generating Power from Solar ‐Consultant: SOLON Corporation–Energy Audit for other Energy Savings ‐Consultant: Wendel•LED Lighting, Efficient HVAC, Insulation, Water Meters, Irrigation Systems
Saving with Solar•Solon Corporation–Based in Tucson–Develop, design, install, finance, and service solar power plantsMarana Health Center Pima County Sheriff Administration
Saving with Solar•Solon Corporation’s Assessment–Existing Town Meters: 136 locations–Suggested Town Meters suited for Solar: 6 locations•Marana Municipal Complex •New Public Safety Building•Ora Mae Harn Park and Pool•Crossroads Park•Marana Operations Center•Wastewater Treatment and Recharge facility•Funding Options–Solonbuilds and owns; Town leases –No upfront capital cost•Solar Service Agreement (SSA)–Town builds; Solonmaintains ‐$7.5 Million upfront cost•Clean Renewable Energy Bonds (CREBS)
Saving with SolarHow does solar save money ?Non‐demand based rate plans bill only kWh (no KW charges)Approximate cost of TEP power: $0.14 ‐$0.17 / kWhCost of Solar power: $0.05 ‐$0.13 / kWhNet meteringPower produced by solar but not immediately used (weekends, holidays, etc…) can be banked for later use
Saving with SolarTiming ‐Why Now?Arizona Corporation CommissionForced rate plan transitionAll presented meters forced onto demand‐based rate plansDemand‐based or 3 part rate plans have large kWh and kW billing components Traditional net metering is being eliminatedHow to “Grandfather” savings?Submit solar interconnection applications before end of TEP phase‐II rate case (Fall 2017)Federal Credits (CREBS) due to expire by December 2017, unless renewed by Congress Public Safety BuildingWill the parking lot be designed with solar?
Saving with SolarSSA(SolonBuilds and Owns; Town Leases for 20 years, then buys)Utility bill if solar is not installedUtility bill after solarSolar billTotal 20‐year Savings: $615KTotal 25‐year Savings: $3.42M
Saving with SolarSSA(SolonBuilds and Owns; Town Leases for 6 years, then Buys)Total 20‐year Savings $2.8MTotal 25‐year Savings $5.6MLease Own
Saving with SolarCREBS(Town secures $7.5M @ 1% and pays off in 20 years; Solonmaintains)Total 20‐year Savings $2.4MTotal 25‐year Savings $5.7MLoan Payments + MaintenanceUtility bill after solar
Saving with Solar•Next Steps–Council may direct staff:•to continue reviewing all options best suited for Marana•authorize the Town Manager to sign agreements to lease, construct, operate, and maintain alternative energy facilities and equipment for the Town’s use.–If we decide to own solar facilities:•Return to Council for budget authorization